0
A Existing Site
_
_
_
_
_
_

Neighborhood Analysis
Site Analysis
Site Drawings
Floor Plans
Architectural Assessment
Engine...
Neighborhood Analysis
Powell Elementary School is located at the corner of 14th Street NW and
Upshur Street NW. The school...
Site Analysis

Load/Unload

| Existing Site |

The east-west orientation of the site presents an excellent opportunity for...
A

Site Plan - Existing

0

25

| Existing Site |

Site Drawings

B

50

A North Elevation - Existing
2.June.2013

B Build...
DN

DN

DN

T

MAINT.
LOUNGE
224 SF

WEL.
CENTER
335 SF

VESTIBULE

HEALTH
SUITE

VP OFF.

PRE-SCHOOL
754 SF
PRE-KINDERGAR...
JAN. CL.
TEACHER'S
LOUNGE
377 SF

MUSIC LAB
676 SF

DN

THIRD
GRADE
760 SF

FIFTH
GRADE
773 SF

FIRST
GRADE
697 SF

DN

BK...
Classroom - 1959 building

Millwork - 1959 building

Window - 1929 building

Window - 1959 building

Existing Classroom Co...
Hallway - 1959 building

Entry Vestibule - 1929 building

East Stair- 1929 building

Abandoned Attic Fan

Administrative A...
Roof Structure at Cafetorium

‘59 Roof at ‘29 Bldg

Roof Structure at ‘29 Classrooms

Boiler Room

Abandoned Attic Fan

Ma...
water main

main TER

Plumbing Assessment Summary

IT/AV/Security Assessment Summary

Food Service Assessment Summary

Bui...
Existing
PROS
- Clear entry and circulation scheme
- Room to expand while keeping outdoor space
- Good site orientation fo...
Preferred Concept
Option 3 - Expand West + South in Two Phases
PROS
- Logical extension of Building + Circulation along Up...
Master Plan - Site Plan

Master Plan
2.June.2013

0

25

50

| Proposed Plans |

Site Plan - Proposed

B3
APPROVED SCHEMAT...
DN

FIRST
GRADE
864 SF

KINDERGARTEN
1003 SF

FIRST
GRADE
864 SF

KINDERGARTEN
1003 SF

KINDERGARTEN
1053 SF

KINDERGARTEN...
FIFTH
GRADE
834 SF

FIFTH
GRADE
848 SF

FIFTH
GRADE
849 SF

SCIENCE
STO.
328 SF

FOURTH
GRADE
848 SF

STUDENT
INTRV. RM +
...
sf

%

sf

CORE ACADEMIC AREA
Pre-School Classroom

810

1,175

1,027

-12.6

-148

Pre-School Classroom

811

1,175

1,00...
Existing Spaces
Area

Ed Spec Area

BLDG A,B,C,D
Space Provided

sf

SPACE NAME (ED SPEC IF DIFFERENT)

sf

sf

%

sf

DIN...
Building Concepts
This proposal envisions Powell Elementary School as an exceptional place
for learning and an example of ...
Sustainability
Successful sustainable design strategies employed in new schools and public buildings in the District
and a...
Perspectives

| Design Narrative |
C3
2.June.2013

APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL

ISTUDIO
architect...
Perspectives

| Design Narrative |
C4
2.June.2013

APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL

ISTUDIO
architect...
Perspectives

| Design Narrative |
C5
2.June.2013

APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL

ISTUDIO
architect...
FURNITURE:

CEILING:

F3

F3

F3

F3

F3
L5
F4B

L9B
L1

L9B

L9B
L2
F4B

L4B
L4A

Linear Pendant Fixture + Acoustical Cei...
FURNITURE:

CEILING:

F3

F3

F1B

F1B

F1B

L4B

L5

L9B

L4A
F4A

L3

L1B

L9C

SMART
Board

L3

L1B

Linear Pendant Fix...
FURNITURE:

CEILING:

L5

F3

F3

F3

F1

F1

L4A

L9A

L1
L3

L4B
F4A

Linear Pendant: LITE CONTROL - ARCOS
Linear Pendan...
Civil Recommendations

Mechanical Recommendations

Electrical Recommendations

New 6”-8” sanitary sewer connection(s) will...
Plumbing Recommendations

IT/AV/Security Recommendations

Food Service Recommendations

A full video auger scan of the exi...
The project scope calls for the existing Powell Elementary School Building to be
expanded to include a new addition to be ...
A full engineered sediment control application will be required to be filed to the
DDOE for review and approval.
5. STORM ...
The project site area will comprise of four components that will consist of the
following:
1. The new building C addition ...
| Detailed Reports |

Civil Assessment

Civil Assessment

D4
2.June.2013

APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SC...
Structural Assessment

Foundations:
Per the project geotechnical report, the new building will be founded on deep
foundati...
Non-Structural Elements:
Exterior walls are expected to consist of cold-formed steel (metal stud)
framing with large exten...
Phase 1 Modernization:
No structural work anticipated.

Phase 2 Modernization:
No structural work anticipated.

Phase 3 Mo...
Mechanical Assessment

INTRODUCTION

equipment (see 2011 ASHRAE Handbook – HVAC Applications, Table 4 – this table is
prov...
Photo M-7: Window AC Unit in Cafeteria/Gym

Photo M-5: Vacuum Pumps

2.1.2

2.1.3

Cooling Systems
Throughout the building...
Restrooms are heated through radiators and convectors (Photos M-17 and M-19). They
are exhausted through two fans located ...
The warming kitchen is heated with a steam radiator and cooled with a window AC unit
(Photo M-25). An exhaust fan is dedic...
The LEED credits achievable for the school Additions with this type of system are listed in the
following table, which is ...
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
Powell Elementary School Approved Schematic Design (June 2, 2013)
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Powell Elementary School Approved Schematic Design (June 2, 2013)

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Transcript of "Powell Elementary School Approved Schematic Design (June 2, 2013)"

  1. 1. A Existing Site _ _ _ _ _ _ Neighborhood Analysis Site Analysis Site Drawings Floor Plans Architectural Assessment Engineering Assessment B Proposed Plans _ _ _ _ _ _ Vision: Powell Elementary School will be a healthy, secure, + inspiring place for learning that promotes the school’s focus on academic rigor in a nurturing multicultural community. Concept Studies Preferred Concept Master Plan - Site Plan Master Plan - Floor Plans Program Comparison Plan to Program Comparison C Design Narrative _ _ _ _ _ Building Concepts Sustainability Perspectives Classrooms Building Systems D Detailed Reports Civil Assessment Structural Assessment Mechanical Assessment Electrical Assessment Plumbing Assessment IT / Security Assessment Food Service Assessment | Contents _ _ _ _ _ _ _ 2 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  2. 2. Neighborhood Analysis Powell Elementary School is located at the corner of 14th Street NW and Upshur Street NW. The school is well served by public transportation. Metro bus lines 52, 53, and 54 run north-south on 14th Street NW and stop at the northwest corner of the project site. Metro bus lines 60, 62, 63, and 70 stop on Georgia Avenue 0.3 miles east of the site. The Petworth metro station is 0.6 miles away to the Southeast. Neighborhood Analysis The school is located in a residential area which consists primarily of row houses, although there are a few midrise apartments integrated into the neighborhood at prominent corners. There is a concentration of schools nearby to the north and east including Roosevelt High, Hospitality High, Sharpe Health School, Community Academy Public School, and MacFarland Middle School. Piney Branch Park is one block west of the site and provides a connection to Rock Creek Park. Immediately across the street to the north is Upshur Park and Community Center which includes a baseball field, a soccer field, outdoor basketball courts, a playground, an outdoor swimming pool, a computer lab, a kitchen, and a multi-purpose room. The Center offers several classes, camps, and afterschool programs. The Petworth Library is located two blocks to the east at Georgia Avenue. Several small scale commercial areas are within walking distance from the school. | Existing Site | Corner of 14th St NW and Upshur St NW A1 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  3. 3. Site Analysis Load/Unload | Existing Site | The east-west orientation of the site presents an excellent opportunity for solar access because the broad walls of the school face north for even, consistent daylight and south for opportunities to modulate winter and summer solstice sun angles. Prevailing winter winds come from the northwest and prevailing summer winds come from the south-southwest. The school sits up quite high from the street, and there are excellent views to the north and west. Steep slopes along Upshur St. NW and 14th St. NW present both ADA access challenges and storm water runoff challenges. There are privacy and security issues along the alley to the south and residential properties to the east. Drop-off occurs along Upshur St. NW near the primary entrance which includes a broad staircase up to the original 1929 building entrance. The school has only one ADA ramp west of the multi-purpose room which can only be accessed from the alley at the rear of the site. This back entrance is also used for deliveries to the school but presents a security challenge because the gate must remain open at times and cannot be monitored by security. The teachers and staff enter the building on the east side of the auditorium near the parking area. Site Analysis The original building is a 2-story structure built in 1929 with brick walls, a slate roof, and a finely detailed interior. It has an “L ”-shaped footprint. The school was expanded in 1959 to the east with a flat roofed brick building. This addition has an “L ”-shaped footprint mirroring the original building to create a courtyard space that is currently being used for parking. The existing brick walls are in fair condition and will need to be repaired and repointed at selected locations. The windows and security grilles are in very poor condition. The school’s play area is located on a large asphalt expanse to the west of the original building. Overflow classrooms are housed in a temporary structure known as “The Cottages” and connected to the auditorium with a very high temporary canopy. At the far southwest corner of the site, on school property, are gardens that the community uses. A2 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  4. 4. A Site Plan - Existing 0 25 | Existing Site | Site Drawings B 50 A North Elevation - Existing 2.June.2013 B Building Section - Existing APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL A3 ISTUDIO architecture | design | planning
  5. 5. DN DN DN T MAINT. LOUNGE 224 SF WEL. CENTER 335 SF VESTIBULE HEALTH SUITE VP OFF. PRE-SCHOOL 754 SF PRE-KINDERGARTEN 1024 SF ADMIN. WK. LOBBY KINDERGARTEN 1043 SF CORRIDOR CORRIDOR GIRLS KITCHEN 272 SF PRE-SCHOOL 810 SF PRE-KINDERGARTEN 778 SF PRINC. OFF 197 SF ELEV. COUNSELING RM. 401 SF KINDERGARTEN 783 SF BK. RM. 103 SF STUDENT SUPPORT CENTER 463 SF BOYS DINING/AUDITORIUM 2957 SF VEST. KINDERGARTEN 683 SF PRE-K 914 SF VEST. GIRLS FOURTH GRADE 508 SF Existing Building Summary sf Core Academic / Spec Ed BOYS CORRIDOR 16,455 Media Center FOURTH GRADE 536 SF 1,255 Administration / Health FIFTH GRADE 509 SF 1,078 Arts / Music Labs CRAWL SPACE 1,312 Student Dining + Food Serv 272 Auditorium / Stage First Floor Plan Existing 15 4,105 Subtotal CUST. OFFICE 0 2,523 Mech, Elec, Toilets, Custod BOILER ROOM Circulation 30 UP MECH. RM STO. Subtotal Construction Factor TOTAL AREA Basement Plan - Existing 27,000 9,456 36,456 0.16 43,445 43,445 | Existing Site | THIRD GRADE 536 SF Floor Plans DN 68,24 68, A4 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  6. 6. JAN. CL. TEACHER'S LOUNGE 377 SF MUSIC LAB 676 SF DN THIRD GRADE 760 SF FIFTH GRADE 773 SF FIRST GRADE 697 SF DN BK. RM. 84 SF BK. RM. 112 SF COLLABORATION ROOM 773 SF BOYS SECOND GRADE 683 SF CORRIDOR CORRIDOR BK. RM. 109 SF FIRST GRADE 685 SF ELEV. LIBRARY 1078 SF ART 666 SF BOYS COMPUTER LAB 502 SF FIRST GRADE 698 SF GIRLS SECOND GRADE 692 SF SECOND GRADE 689 SF DN Existing Building Summary sf EDU. COTTAGE ROOF Core Academic / Spec Ed 16,455 Media Center 1,078 Arts / Music Labs 1,255 Administration / Health 1,312 Student Dining + Food Serv 272 Auditorium / Stage Mech, Elec, Toilets, Custod Second Floor Plan Existing 2,523 4,105 Subtotal 0 15 30 Circulation Subtotal Construction Factor TOTAL AREA 27,000 9,456 36,456 0.16 43,445 43,445 Floor Plans STAGE STO. 81 SF | Existing Site | STAGE STO. 80 SF 68,24 68, A5 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  7. 7. Classroom - 1959 building Millwork - 1959 building Window - 1929 building Window - 1959 building Existing Classroom Condition Boy’s Toilet Rm - 1929 building Girl’s Toilet Rm - 1929 building Girl’s Toilet Rm - 1959 building Girl’s Toilet Rm - 1959 building Existing Toilet Rooms Condition Many teachers report that it is difficult to control the temperature in the classrooms, and it is often too hot or too cold. Some teachers choose not to run the window A/C units because they are too loud. At times, the heating system is running so hot that the windows need to be opened. The windows are single pane throughout the school and are in very poor condition. The 1929 building has wood windows that pivot and slide to open. The 1959 building has non-thermally broken metal windows that are casement and fixed types. The windows are not properly sealed and are significantly rusted. Several glass panes are cracked or replaced with translucent plastic or solid panels. 1929 Classroom Finishes: Paint is peeling, and plaster is cracked at several locations on the walls and ceiling. Tape marks are visible throughout. The VCT floors are in fair condition. Closet doors often sit partially open because the hardware is difficult to operate and/or broken. Original stained wood crown, door, and window trim is a distinctive feature, but needs to be refinished. The tile wainscot is in fair condition with some chipping and cracks noted at many locations. It has been found to contain hazardous materials. Conduit and data cable chases run on the surfaces of the walls. The existing toilet rooms are in fair condition. Toilet rooms are not in full compliance with ADA. There are two boys’ rooms and one girls’ room that have ADA toilet stalls, but the doors into those rooms and lavatory fixtures are not in compliance. The toilet partitions appear to be relatively new and in good condition. Although the fixtures are old, they appear to be in good condition generally. The tile floors and walls are in fair to poor condition with several areas of cracking and mismatched patching noted, especially in the 1929 building. The plaster walls and ceiling in the 1929 building have cracks and peeling paint. 1959 Classroom Finishes: The original interior CMU walls are in good condition. The VCT floors and rubber base are in fair condition. The acoustical ceiling tile is in poor condition. The cabinetry below the windows on either side of the unit ventilators is in poor condition with several broken doors and shelves noted. The metal interior doors and frames need to be repainted. The tile floor in the Pre-S, Pre-K, and Kindergarten bathrooms is in poor condition. Architectural Assessment Doors and Millwork - 1929 building | Existing Site | Classroom - 1929 building A6 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  8. 8. Hallway - 1959 building Entry Vestibule - 1929 building East Stair- 1929 building Abandoned Attic Fan Administrative Area Kitchen Library Administrative Area Auditorium Existing Hallways and Stairs Condition Existing Support Spaces Condition Building B, 1929 has terrazzo flooring in the halls which is in good condition. Stained wood millwork at the building entry is a distinctive feature but needs to be refinished. There are areas of significant water damage in the west stair and neighboring janitor’s office. There is significant cracking at the floor line in the east stair of the 1929 building. In the auditorium, water leaks (now repaired) have damaged the plaster detailing at the crown at several locations. The plaster walls are cracked, and the paint is peeling. The tile wainscot is in poor condition with several areas of cracking, poor patchwork, and missing tile. The east and west exits from this space to the exterior are heavily used and are consequently in very poor condition, particularly the wood doors and trim. Building A, 1959 has VCT floor tiles that are in fair condition with several patched areas with mismatched tile. The glazed block wainscot is in fair condition, though several cracks and drill holes were noted. The painted CMU wall finish above the wainscot is in good condition. The acoustical ceiling tile is in poor condition. The metal doors and frames need to be repainted throughout. The kitchen finishes are in fair condition. The finishes in the administrative areas, teachers’ lounge, and support areas are generally in poor condition with peeling paint, cracked plaster, and chipped tiles noted. The wood doors and trim need to be refinished throughout and are in worse condition at hightraffic areas. Architectural Assessment Hallway - 1959 building Entry Lobby - 1929 building | Existing Site | Hallway - 1929 building A7 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  9. 9. Roof Structure at Cafetorium ‘59 Roof at ‘29 Bldg Roof Structure at ‘29 Classrooms Boiler Room Abandoned Attic Fan Main Dist. Panel 1929 building classroon 1959 building classroon Electrical Assessment Summary Review of public utility records made available did not indicate the exact location (vertical and horizontal) of utilities found within the project work limits, except for an inlet on the asphalt surface and other indiscriminate tops/covers. The horizontal locations of utilities within the project limits were determined according to those known and available records. The horizontal location of gravity systems is indicated on the existing conditions plan. However, the vertical location of the non-gravity systems, (i.g. gas, telephone, electric, etc) was neither field verified nor confirmed. Therefore, the absence of as-built plans and field test holes will require the contractor to engage in an exploration for non-gravity utility systems in advance of engaging new utility/site work to assure clearances are adhered to between new and existing utilities. Both Building A, 1959 and Building B, 1929 are heated with steam and hot water produced in a boiler room located in the basement of Building B, 1929. Steam and hot water are distributed to the building systems through piping in a crawl space adjacent to the boiler room. The steam piping to the radiators in Building B, 1929 appear to be in poor condition. And the hot water piping to the unit ventilators and convectors in Building A, 1959 appear to be in fair condition. The building is presently served from an underground electric service. The incoming service enters the main electrical room located at the basement underground level of Building B, 1929 and terminates at the power company’s current transformer cabinet with the power company’s meter. From the main service entrance a disconnect switch with sub-feed serves the Building A, 1959 distribution panel. The main line service switch feeds the main distribution panel (MDP). In addition to the main panels, the branch circuit panels are located throughout the building. Most of the components of this system are old and in poor condition. Throughout the existing buildings, all cooling is done using window AC units (about 2 tons each). These units were probably installed in 2008, and appear to be in good condition. The classrooms are provided with steam radiators in Building B, 1929, and unit ventilators in Building A, 1959. The unit ventilators are connected to openings on the side walls for ventilation. Due to the nature of its heating systems, Building B, 1929 receives no mechanical ventilation during the heating season. The overall condition of the air-side systems is fair. Structural Assessment Summary The original 1929 building (Building B) foundations are deep concrete piers with the bottom of the piers approximately 25 feet below first floor elevation. The ground floor and second floor are reinforced concrete joist and slab systems supported on reinforced concrete columns. Exterior walls are threewythe unreinforced brick masonry. A steel roof truss system clear spans over the second floor and supports a concrete roof slab and a lathe and plaster ceiling below. Interior walls are hollow-clay-tile (terra cotta) and were in some cases significantly damaged by the August 2011 earthquake. Additionally, there is a natural ventilation system in Building B, 1929, with openings in classrooms ducted to the attic where a large fan rejects the air drawn from the classrooms to the exterior through the cupola. The fan is no longer working, however. There is no emergency power to the building. The existing fire alarm system is old and outdated. The existing building interior is illuminated with the combination of recessed, surface, and stem mounted 2’x4’ or 1’x4’ fluorescent lighting fixtures. Generally, these 1’x4’ fixtures are in poor condition. The main corridors are provided with recessed mounted 2’x4’ fluorescent lighting fixtures, which are in fair condition. The classrooms are also provided with pendant mounted 1’x4’ fluorescent lighting fixtures. Overall, the lighting in the 1929 building appears to be old and in bad condition, but the lighting in the 1959 building is in fair condition. The site lighting is provided by building wall mounted lighting fixtures. The 1959 addition (Building A) building foundations are concrete belled caissons, with the bottom of caisson approximately 45’ below first floor elevation. The ground floor, second floor, and roof are reinforced concrete joist and slab systems, supported on reinforced concrete columns. Exterior walls are composite brick and CMU block construction. Interior partition walls are CMU block. Engineering Assessment Mechanical Assessment Summary | Existing Site | Civil Assessment Summary A8 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  10. 10. water main main TER Plumbing Assessment Summary IT/AV/Security Assessment Summary Food Service Assessment Summary Building B, 1929 has a combined system serving both sanitary waste and storm water. The piping is connected below the original building slab and exits the building as an 8-inch line north towards Upshur Street. Building A, 1959 has separate storm and sanitary waste within the structure and discharges to the north alongside the original 8-inch combined sewer. A main telecom equipment room (TER/”MDF”) exists in the health suite in the main office suite of Building B. A second telecom room (TR/”IDF”) is located in the secondfloor teachers’ lunchroom also in Building B. Corridor cabling is routed through a combination of surface mounted raceway and EMT conduit. In classrooms, cables are run in smaller surface mounted raceways, EMT, and also run exposed to the classroom. The cabling is not secure and is prone to casual damage. The current food service operation is in the main auditorium in Building B and serves meals prepared off-site. These meals are served on a traditional serving line to students in multiple lunch periods. The pantry supporting the operation consists of the minimal amount of equipment required to support this type of operation both in terms of functionality and sanitation. There are 2 walk-in refrigerator units located in the auditorium. The storm drainage system of Building B, 1929 consists of downspouts that discharge into a boot just above grade at each downspout location. These downspouts are connected to the combined sanitary/storm sewer under the original structure. Building A, 1959 has a flat roof with old roof drains located just inside the roof parapet. The storm and sanitary sewer of Building A combine outside the building footprint before discharging to the combined public sewer. The current condition of the gas service and associated piping is good, although further coordination with Washington Gas will be required to determine the capacity of the existing gas service. The existing building does not have a fire protection system. Data/telephone/video distribution racks are located in the two telecom rooms described above, and at the demarc in the boiler room. Both the telephone and the data network have their head end equipment in the TER/MDF. Classrooms are currently minimally wired with only a few data outlets near the teacher’s desk and 2-4 in the rear of the classroom for students’ PCs. There is no built-in audio-visual infrastructure for interactive whiteboards or for interaction between a teacher’s computing device and the display device in each classroom. Kitchen exhaust fan Kitchen sink The existing facility does not meet the current operational goals and requirements of DCPS Foodservice Department, as new elementary schools are utilizing on-site preparation, cooking, and serving methods. The current intercom headend console is located in the entrance to the health suite. The console is outdated and may no longer be supported by the manufacturer or capable of expansion. The burglar alarm seems to be in disrepair at many doors, where the contacts do not appear to be aligned. The door entry system is also in disrepair and does not operate the door reliably. The school has complained of a lack of security camera coverage. The CCTV head end is located in the TER/MDF in a locked cabinet. It is unclear whether the system is currently functioning. Engineering Assessment The hot water system consists of an outdated gas fired 100 gallon storage type water heater along with an old 210 gallon horizontal storage tank, which may contain hazardous insulation materials. 1929 building cabling | Existing Site | The school’s domestic water system is supplied by a 4-inch line entering from the west. The domestic water system throughout the original 1929 building is steel. Building A, 1959 has primarily copper distribution piping with steel mains. second TER A9 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  11. 11. Existing PROS - Clear entry and circulation scheme - Room to expand while keeping outdoor space - Good site orientation for energy efficiency / passive strategies (east-west) CONS - Separate academic clusters, distant from support spaces - No good connection to outdoors - Limited direction for expansion (west + south) - Not much green space Option 1 - Expand West in Two Phases Option 2 - Expand South in Two Phases PROS - Engages alley side of site + parking - Separate outdoor Green Spaces for older + younger ages CONS - Site orientation less optimal for energy efficiency / passive strategies (east-west) - Does not follow Cluster Concept, Support Spaces are not centralized - If phases are reversed, Academic Clusters are distant | Proposed Plan | CONS - Does not follow cluster concept. Support Spaces are not centralized - If phases are reversed, Academic Clusters are distant Concept Studies PROS - Logical extension of building + circulation along Upshur Street - Separate Green Spaces for older + younger ages - Good site orientation for energy efficiency / passive strategies (east-west) B1 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  12. 12. Preferred Concept Option 3 - Expand West + South in Two Phases PROS - Logical extension of Building + Circulation along Upshur St - Separate outdoor Green Spaces for older + younger ages - Good site orientation for energy efficiency / passive strategies (east-west) - Good clustering, Academic cores are close to Support Spaces - Engages alley side of site + parking - Follows Cluster Concept - Support Spaces are centralized CONS - This master plan is intended to meet the growing needs of the school and establish a vision for Powell Elementary School as a safe, healthy place for learning with a well-established connection to the natural environment. The preferred concept (Option 3) proposes to extend the mainly east-west orientation of the existing buildings and maintain the Cluster Concept of the Education Specification – Academic Clusters and centralized Support spaces. In this master plan, a new Academic wing extends west of the existing school from the point where the main hallway exits to the school grounds. A two-story Support wing extends south from this same connection point. The two wings form the north and east edges of a large Green Space providing ready access to the outdoors both physically and visually. Play equipment and shade trees are located at the perimeter while the center remains open for the greatest flexibility of use. Equipment here is intended for use by the older students, particularly those in the academic clusters of the new wing. A Patio on the south side of the Academic wing connects the classrooms to the Green Space and provides hardscape play area. An Outdoor Classroom located in the northwest corner near the exit stair provides a landscaped place for gathering, screened with plantings from the streets below. Curriculum Gardens are located near the entrance of the existing Community Gardens to the south. Green Space is proposed for the area enclosed by the existing school wings in what is currently the parking lot. These spaces may provide outdoor education and play areas for the younger children, with easy access from the nearby academic clusters. 2.June.2013 The proposed Academic wing is a north-facing two-story line of classrooms that looks out on Upshur Park across the street. The hallways here provide visual access and a direct connection to the outdoor spaces. The Support wing is adjacent to the existing Auditorium and looks out onto the Green Space to the west. An open Atrium provides a buffer between new program spaces and the Auditorium, allowing daylight to come in through the tall arched windows. A new secure entrance is proposed here at the rear of the site. Parking for visitors and staff is provided nearby in lots with alley access and require some coordination with DDOT. Loading takes place at the rear of the building near the kitchen, with screened areas for waste and recycling. The Main Entry is landscaped with paved patios and an accessible ramp to navigate the one-story change in height from street level to school. The ramp provides a well-located drop-off site and connects with the stair landings leading to each of the building entrances. Plantings that are native or non-invasive and drought-tolerant provide a healthy, low maintenance outdoor environment. Stormwater management will be provided for quantity and quality with Low Impact Development strategies such as bioswales, rain gardens, permeable paving, and rainwater harvest for irrigation. Critical areas for management include the parking strips, the Green Space, and the landscaped slope on the north edge of the site. Spaces in the proposed plan are located using the Cluster Concept outlined in the Education Specification as a guide. Support spaces are located in the heart of the main building, Building B, 1929 along with the Auditorium. Here a new Welcome Center and a Security Desk are proposed for the Lobby area. Pre-school through grade 2 classrooms are located partly in this building and occupy most of Building A,1959. The new two-story Academic wing to be built in 2013 will house grade 3 through 5 classrooms along a daylight hallway. Expanded Support spaces will be housed in the future 2-story wing adjacent to the existing Auditorium. Student Dining, Kitchen, and Service will be located on the first floor with access from the rear of the site. A glass Atrium will fill the space between the Dining and Auditorium spaces and provide a staging area away from the classroom hallways. Overlooking the Atrium are the Media Center, Computer and Music Rooms on the second floor. A Grand Stair connecting the two floors will be built where the three wings conjoin. The Cottages currently in use will serve as additional space until the support wing is built in the future. APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL | Proposed Plans | Plan Concepts Site Plan Concepts Preferred Concept Cluster Concept Diagram B2 ISTUDIO architecture | design | planning
  13. 13. Master Plan - Site Plan Master Plan 2.June.2013 0 25 50 | Proposed Plans | Site Plan - Proposed B3 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  14. 14. DN FIRST GRADE 864 SF KINDERGARTEN 1003 SF FIRST GRADE 864 SF KINDERGARTEN 1003 SF KINDERGARTEN 1053 SF KINDERGARTEN 1000 SF VESTIBULE GIRLS UP JAN. CL. 55 SF DN PRE-KINDERGARTEN 1000 SF LOBBY ELEC. CORRIDOR GALLERY UP ATRIUM GRAND STAIR WEL. CENTER 440 SF RECORD RM. MAIL RM. 141 SF 118 SF FAMILY RESPECT CNTR 426 SF DINING/AUDITORIUM 2682 SF CORRIDOR SECURITY 76 SF CORRIDOR SE RESOURCE ROOM 408 SF BOYS ADMIN. WK. 163 SF PRE-SCHOOL 1000 SF PRINC. OFF / CONF RM 446 SF HEALTH 355 SF TEACHER'S TOILET PRE-KINDERGARTEN 1022 SF PRO. LITERACY RM. 347 SF PRE-SCHOOL 1000 SF BK. RM. 170 SF DN UP VEST. DN UP CUST. OFFICE 252 SF RECEIVING AREA 612 SF CRAWL SPACE CUST. OFFICE 150 SF TOILET / SHOWER 200 SF BOILER ROOM UP First Floor Plan 0 16 32 Master Plan MECH. RM Basement Plan GIRLS * PRE-KINDERGARTEN 1000 SF AUDITORIUM 2964 SF VEST. KITCHEN 1616 SF ATRIUM ELEC. RM. PRE-SCHOOL 1027 SF Master Plan - Floor Plans FIRST GRADE 864 SF | Proposed Plans | FIRST GRADE 835 SF DN B4 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  15. 15. FIFTH GRADE 834 SF FIFTH GRADE 848 SF FIFTH GRADE 849 SF SCIENCE STO. 328 SF FOURTH GRADE 848 SF STUDENT INTRV. RM + GUID. OFF. 817 SF SUPPORT SUPPORT OFFICE OFFICE STAFF RESOURCE 174 SF 173 SF LOUNGE ROOM 380 SF 350 SF VP OFF. 120 SF BUS. MGT 120 SF FOURTH GRADE 830 SF * TEACH. OFF. (2) 519 SF INST. COACH 103 SF THIRD GRADE 803 SF DN THIRD GRADE 895 SF SECOND GRADE 885 SF BK. RM. 280 SF ELEC. CORRIDOR CORRIDOR ATRIUM BOYS CORRIDOR TER GRAND STAIR FOURTH GRADE 773 SF JAN. CL. BOYS * COLLABORATION ROOM 1078 SF TR STAGE STO. MUSIC LAB CORRIDOR 1348 SF ART 1340 SF 0 16 32 Master Plan Master Plan - Floor Plans SECOND GRADE 845 SF GUID. OFF 258 SF STAGE STO. Second Floor Plan SPEECH RM. 524 SF SECOND GRADE 844 SF DN COMPUTER LAB 970 SF * GIRLS EX. DAY 259 SF LIBRARY 1704 SF THIRD GRADE 849 SF SUPPORT OFFICE 168 SF | Proposed Plans | CORRIDOR B5 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  16. 16. sf % sf CORE ACADEMIC AREA Pre-School Classroom 810 1,175 1,027 -12.6 -148 Pre-School Classroom 811 1,175 1,000 -14.9 -175 Pre-School Classroom 758 1,175 1,000 -14.9 -175 Pre-Kindergarten Classroom 1,024 1,175 1,022 -13.0 914 1,175 1,000 -14.9 -175 Pre-Kindergarten Classroom 0 1,175 1,000 -14.9 -175 Kindergarten Classroom 1,043 1,175 1,079 -8.2 -96 Kindergarten Classroom 783 1,175 1,053 -10.4 -122 Kindergarten Classroom 693 1,175 1,036 -11.8 -139 Kindergarten Classroom 0 1,175 1,000 -14.9 -175 Grade 1 Classroom 697 850 864 1.6 14 Grade 1 Classroom 685 850 864 1.6 sf Media (Reading / Learning / Circulation-1350 SF) 0 850 864 1.6 14 Grade 1 Classroom 0 850 835 -1.8 -15 Grade 2 Classroom 683 850 885 4.1 35 Grade 2 Classroom 698 850 845 -0.6 -5 Grade 2 Classroom 689 850 844 -0.7 -6 Grade 3 Classroom 536 850 895 5.3 45 Grade 3 Classroom 508 850 849 -0.1 -1 Grade 3 Classroom 536 850 760 -10.6 -90 Grade 4 Classroom 508 850 917 7.9 67 Grade 4 Classroom 0 850 850 0.0 0 Grade 4 Classroom 0 850 820 -3.5 -30 Grade 5 Classroom 0 850 850 0.0 0 Grade 5 Classroom 0 850 850 0.0 0 Grade 5 Classroom 0 850 821 -3.4 -29 Science Storage 0 250 236 -5.6 -14 502 950 905 -4.7 - - - sf % sf -6.4 - - 100 100 0.0 0 1,078 1,800 1,692 666 1,225 1,215 -0.8 -10 - total 1,592 - 0 TER Rm/ TR Rm (Telecom Head End Room) 1,700 - -108 - - - - ARTS / MUSIC LABS Art (Art Lab-1000 SF) (Kiln Room-75 SF) w/ Art (Storage-150 SF) w/ Art - - - - 589 1,150 1,136 -1.2 - - - - 1,255 2,375 2,351 324 450 419 -6.9 - - - - 0 Music Lab (1000 SF) 75 76 1.3 -14 -45 600 sf 1,078 (Office/Workroom/Storage-350 SF) w/ Media 14 Grade 1 Classroom BLDG A,B,C,D Space Provided MEDIA CENTER -153 Pre-Kindergarten Classroom Ed Spec Area Computer Lab (Language Lab/Computer Lab) w/ Computer Lab (Distance Learning) Student Intrv Rm (Student Support Intervention Ctr) 463 800 773 -3.4 -27 Collaboration Room 773 1,200 1,078 -10.2 -122 Support Offices - 3 @ 150 SF 401 450 502 11.6 767 400 372 -7.0 -28 SE Resource Room (Resource Room) 765 400 474 18.5 74 0 500 534 6.8 34 total - ADMINISTRATION Welcome Center/Mail Rm (Welcome Center-350 SF) (Mailroom-100 SF) w/ Welcome Ctr Security Area w/locking storage Conference Room -31 1 0 200 246 23.0 46 Principal's Office 197 180 200 11.1 20 VP Office (Assistance Principal Office) 116 120 120 0.0 0 Professional Literacy Room 0 400 347 -13.3 -53 Business Manager Office (Office) 0 120 120 0.0 0 Administrative Workroom 173 150 197 31.3 47 0 120 130 8.3 10 Toilet 34 50 50 0.0 0 Instructional Coach (not in Ed Spec) ** 0 150 - 150 * 150 207 38.0 57 381 355 355 0.0 0 Records Room Guidance Office (Counselor & Psychologist) HEALTH Health Suite (incl Office/Treatement/Stor/Toilet) 52 Resource Room (Storage-150 SF) w/ Music Lab Speech Rm (Speech/OT/PT) Family Respect / Parent Room (not in Ed Spec) 0 0 482 - 482 408 600 562 -6.3 0 250 214 -14.4 0 250 214 -14.4 -36 0 250 207 -17.2 -43 377 Staff Lounge 400 377 -5.8 -23 1,602 3,020 3,201 -36 Workroom/Teacher Office Extended Day Office/Storage -38 Workroom/Teacher Office Other ADMIN Book Room (Storage) total *This space is included with the Student Intervention Room **This space is included with the Collaboration Room Plan to Program Comparison sf Existing Spaces Area SPACE NAME (ED SPEC IF DIFFERENT) | Proposed Plans | Ed Spec Area BLDG A,B,C,D Space Provided sf SPACE NAME (ED SPEC IF DIFFERENT) Existing Spaces Area B6 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  17. 17. Existing Spaces Area Ed Spec Area BLDG A,B,C,D Space Provided sf SPACE NAME (ED SPEC IF DIFFERENT) sf sf % sf DINING / FOOD SERV Student Dining Area/Multi-purpose (2400 SF) 0 2,643 1.7 - - - 1,500 1,508 0.5 8 272 4,100 4,151 2,523 2,400 2,785 16.0 385 0 Kitchen Suite 2,600 - (Chair and Table Storage-200 SF) w/ Student Dining 350 393 12.3 43 272 total 43 - AUDITORIUM (Existing) Auditorium / Stage ENGINEERING / CUSTODIAL Receiving (Supply Storage/Receiving) Toilet/Shower 0 total 200 200 0.0 0 58 Custodian Engineer Office 150 150 0.0 0 58 700 743 *This space is included with the Student Intervention Room | Proposed Plans | Plan to Program Comparison **This space is included with the Collaboration Room B7 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  18. 18. Building Concepts This proposal envisions Powell Elementary School as an exceptional place for learning and an example of a healthy built environment for the community. The new Powell ES will provide educational spaces that facilitate teaching and inspire learning. Support spaces will be useful, comfortable, and easy to maintain. Existing buildings will be rehabilitated, and new buildings will be built to a higher standard, drawing on precedents from the past as well as lessons learned. Indoor Environment + Materials Lighting, technology, and sound systems will be designed for energy-efficiency as well as performance. Daylighting, sightlines, and improved acoustics each contribute to better conditions for learning. Copious natural light provided by windows will be evenly distributed using translucent materials and light shelves to minimize glare. Sunscreens, shades, and other devices also help to control how light enters the building. With the right use of glazing most occupied spaces will have multiple views to the outdoors, establishing a strong connection with the natural environment. Each space will be designed with materials to provide the right sound absorption for optimal comprehension such as acoustic ceilings in classrooms and sound acoustic decking in new hallways. Building systems equipment will be selected with superior acoustic properties. Building materials and finishes will be selected for their durability, ease of maintenance, and their sustainable properties. Building Concepts Orientation The east-west orientation of the proposed Academic wing lends itself well to designing a high-performing building – one that makes use of simple architectural features to provide supplemental means for heating, ventilating, and cooling. The south façade is an ideal location for larger amounts of glazing which provide light and views while sunscreens and shading devices can control solar gain. A hallway at this location provides a transitional space that buffers a well-insulated classroom on the north side from the wider temperature swings without driving up heating and cooling costs. The north-south configuration of the Support wing suggests different methods – vertical fins on the west façade to control solar gain and an Atrium on the east to control temperature swings in the occupied spaces. Energy Energy-efficient HVAC systems are a baseline for a green school. However, there are supplementary systems such as passive cooling and ventilating that can save a lot in energy costs and minimize the negative effects of non-renewable energy use. Strategies for natural ventilation such as cross-ventilation and ventilation flues make use of natural methods to promote airflow where needed for a comfortable indoor environment while providing teachable moments about the natural world. Solar chimneys with exhaust turbines take advantage of the heat of the sun and the stack effect to move fresh air through an occupied room. When outdoor conditions are right, a light goes on in the classroom letting the students and teacher know it’s time to open windows to catch a cool breeze. A similar system may be employed in the 1929 building which was designed for natural ventilation before the development of air conditioning. Ventilation flues, discovered in the building during survey, most likely explain why the 1929 building (Building B) was often found to be more comfortable than the 1959 building (Building A) where these features don’t exist. Key | Design Narrative | 1. Prevailing Breezes 2. Natural Ventilation 3. Operable Windows 4. Indirect/Direct Lighting 5. Ventilation Flue / Solar Chimney 6. Light Shelf 7. Acoustical Metal Deck 8. Operable Dampers 9. Acoustic Ceiling 10. Perforated Metal Screen 11. Exhaust Turbine 12. Natural Ventilation Indicator Light 13. Vented Cupola Phase 1 Addition Cross Section 2.June.2013 1929 Building Cross Section APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL C1 ISTUDIO architecture | design | planning
  19. 19. Sustainability Successful sustainable design strategies employed in new schools and public buildings in the District and across the nation include: 1. Shaw Library, Washington, DC: South facing perforated metal screen for shading 2. Newberg Center, Newberg, OR: Passive heating, cooling, and ventilation 3. Sidwell Friends School, Washington, DC: Light-shelves and solar chimneys 4. Tenley / Friendship Library, Washington, DC: Vertical louver system for solar control 5. Stoddert Elementary School, Washington, DC: Day lit single loaded corridor A preliminary review of the concept design with the LEED for Schools standard identified 53 probable points and another 31 possible points for a LEED-Silver rating if certified. Note that many of the Indoor Environmental Quality LEED points will be achieved simply by satisfying the performance criteria outlined in the Ed Spec. 1 LEED 2009 for Schools New Construction and Major Renovations 2 Powell Elementary Project Checklist ? Prereq 2 Credit 1 2 Credit 2 2 Credit 3 Credit 4.1 Credit 4.2 2 2 1 1 Credit 4.3 Credit 4.4 Credit 5.1 Credit 5.2 1 1 Credit 6.1 Credit 6.2 1 1 1 Credit 7.1 Credit 7.2 Credit 8 1 Credit 9 Construction Activity Pollution Prevention Environmental Site Assessment Site Selection Development Density and Community Connectivity Brownfield Redevelopment Alternative Transportation—Public Transportation Access Alternative Transportation—Bicycle Storage and Changing Rooms Alternative Transportation—Low-Emitting and Fuel-Efficient Vehicles Alternative Transportation—Parking Capacity Site Development—Protect or Restore Habitat Site Development—Maximize Open Space Stormwater Design—Quantity Control Stormwater Design—Quality Control Heat Island Effect—Non-roof Heat Island Effect—Roof Light Pollution Reduction Site Master Plan Joint Use of Facilities 1 2 Y 2 2 Credit 10 7 Water Efficiency Prereq 1 2 Credit 1 2 4 1 Materials and Resources, Continued Possible Points: 24 Y Prereq 1 1 2 1 Sustainable Sites N Credit 2 Credit 3 Credit 3 1 4 1 4 1 2 2 1 1 1 1 1 1 1 1 1 2 to 4 2 2 to 4 1 2 2 Y Y Y 12 7 Energy and Atmosphere Prereq 1 Prereq 2 Prereq 3 Credit 1 7 2 Credit 2 Credit 3 1 Credit 4 2 2 Credit 5 Credit 6 Credit 5 1 Credit 6 Credit 7 16 3 Y Y Y 1 Prereq 2 Prereq 3 Credit 1 Credit 2 Credit 3.1 Credit 3.2 2 Credit 4 Credit 5 Credit 6.1 Credit 6.2 Credit 7.1 Credit 7.2 Credit 8.1 Credit 8.2 Credit 9 Credit 10 3 Fundamental Commissioning of Building Energy Systems Minimum Energy Performance Fundamental Refrigerant Management Optimize Energy Performance On-Site Renewable Energy Enhanced Commissioning Enhanced Refrigerant Management Measurement and Verification Green Power 1 1 3 Materials and Resources Prereq 1 Credit 1.1 Credit 1.2 Credit 2 Possible Points: 19 Minimum Indoor Air Quality Performance Environmental Tobacco Smoke (ETS) Control Minimum Acoustical Performance Outdoor Air Delivery Monitoring Increased Ventilation Construction IAQ Management Plan—During Construction Construction IAQ Management Plan—Before Occupancy Low-Emitting Materials Indoor Chemical and Pollutant Source Control Controllability of Systems—Lighting Controllability of Systems—Thermal Comfort Thermal Comfort—Design Thermal Comfort—Verification Daylight and Views—Daylight Daylight and Views—Views Enhanced Acoustical Performance Mold Prevention Innovation and Design Process Credit 1.1 Credit 1.2 1 1 1 to 19 1 to 7 2 1 2 2 1 Credit 1.3 Credit 1.4 Credit 2 1 Credit 3 Possible Points: 13 Storage and Collection of Recyclables Building Reuse—Maintain Existing Walls, Floors, and Roof Building Reuse—Maintain 50% of Interior Non-Structural Elements Construction Waste Management Credit 1.3 1 to 2 1 1 to 2 53 31 22 Regional Priority: Regional Priority: Regional Priority: Regional Priority: Specific Specific Specific Specific 4 1 1 1 1 1 1 Possible Points: 4 Credit Credit Credit Credit Total Certified 40 to 49 points 1 1 1 1 1 to 4 1 1 1 1 1 1 to 3 1 1 1 Possible Points: 6 Innovation in Design: Specific Title Innovation in Design: Specific Title Innovation in Design: Specific Title Innovation in Design: Specific Title LEED Accredited Professional The School as a Teaching Tool Regional Priority Credits Credit 1.1 Credit 1.4 Y 2 1 2 1 to 2 1 to 2 1 to 2 1 1 Possible Points: 33 Credit 1.2 10 Materials Reuse Recycled Content Regional Materials Rapidly Renewable Materials Certified Wood Indoor Environmental Quality Prereq 1 1 1 1 2 1 1 1 1 1 3 1 1 1 Credit 3 Credit 4 1 3 13 11 9 N 2 Possible Points: 11 Water Use Reduction—20% Reduction Water Efficient Landscaping Innovative Wastewater Technologies Water Use Reduction Process Water Use Reduction ? 1 1 1 1 Possible Points: 110 Silver 50 to 59 points Gold 60 to 79 points Platinum 80 to 110 3 5 Sustainability Y Y Y 1 2 | Design Narrative | 9 12 3 C2 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  20. 20. Perspectives | Design Narrative | C3 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  21. 21. Perspectives | Design Narrative | C4 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  22. 22. Perspectives | Design Narrative | C5 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  23. 23. FURNITURE: CEILING: F3 F3 F3 F3 F3 L5 F4B L9B L1 L9B L9B L2 F4B L4B L4A Linear Pendant Fixture + Acoustical Ceiling Linear Pendant: LITE CONTROL - ARCOS Acoustical Ceiling: MARS CLIMAPLUS w/FINELITE DXF GRID KI Student Desk Student Desk KI Intellect Wave Chair Student Chair L3 SMART Board Millwork F4A F6 CL. F4A ? L9B SECOND GRADE FURNITURE PLAN L1 L2 L3 L4A L4B L5 L9B STUDENT TABLE COMPUTER TABLE BOUND CARPET RUG TEACHER'S CHAIR TEACHER'S DESK 2 DRAWER LATERAL FILE STACKABLE CHAIR 19" 19" 15" 24 3 1 1 1 1 27 SECOND GRADE - CASEWORK SCHEDULE TYPE DESCRIPTION HEIGHT COUNT Accent Wall/Canopy @ Entry Door FLOORING: MILLWORK F2 F3 F4A F4B F6 Cubbies: Refurbish existing closet w/ new millwork ECORE Ecosurfaces Cork/Rubber flooring (Option 1) Refinish existing floor (Option 2) 2.June.2013 SECOND GRADE AXON VIEW Plywood veneer panels Wilsonart Laminate to match KI Millwork Laminate Countertop colors APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL CUBBIES WALL SHELVING SMART BOARD 2' - 3" 1 5 2 2 1 | Design Narrative | SECOND GRADE - FURNITURE SCHEDULE TYPE DESCRIPTION HEIGHT COUNT Classrooms 1/8" = 1'-0" C6 ISTUDIO architecture | design | planning
  24. 24. FURNITURE: CEILING: F3 F3 F1B F1B F1B L4B L5 L9B L4A F4A L3 L1B L9C SMART Board L3 L1B Linear Pendant Fixture CONTROL - ARCOS Linear Pendant: LITE + Acoustical Ceiling Acoustical Ceiling: MARS CLIMAPLUS w/FINELITE DXF GRID KI Student Desk Student Desk KI Intellect Wave Chair Student Chair Case Systems Cubbies Cubbies L1B L9C F6 L9C L9C L8 L9C L8 L1B Millwork L1B F4A F3 F3 KINDERGARTEN FURNITURE PLAN L1B L2 L3 L4A L4B L5 L9A L9B L9C Accent Wall/Canopy @ Entry Door ECORE Ecosurfaces Cork/Rubber flooring 15" 15" 5 4 2 1 1 1 1 3 20 KINDERGARTEN - CASEWORK SCHEDULE TYPE DESCRIPTION HEIGHT COUNT Cubbies FLOORING: DESC COMPUTER TABLE BOUND CARPET RUG TEACHER'S CHAIR TEACHER'S DESK 2 DRAWER LATERAL FILE STACKABLE CHAIR STACKABLE CHAIR STACKABLE CHAIR F2 F3 F4A F4B F6 MILLWORK Plywood veneer panels Laminate Laminate colors Wilsonart Countertop to match KI Millwork CUBBIES WALL SHELVING SMART BOARD KINDERGARTEN AXON VIEW 2' - 3" 1 5 2 2 1 | Design Narrative | KINDERGARTEN - FURNITURE SCHEDULE TYPE DESCRIPTION HEIGHT COUNT Classrooms 1/8" = 1'-0" C7 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  25. 25. FURNITURE: CEILING: L5 F3 F3 F3 F1 F1 L4A L9A L1 L3 L4B F4A Linear Pendant: LITE CONTROL - ARCOS Linear Pendant Fixture + Acoustical Ceiling KI Student Desk Student Desk KI Intellect Wave Chair Student Chair Cubbies Case Systems Cubbies Acoustical Ceiling: MARS CLIMAPLUS w/FINELITE DXF GRID SMART Board L3 F6 Millwork Natural ventilation louvers + indicator light F4A L9A F2 FIFTH GRADE - FURNITURE SCHEDULE TYPE DESCRIPTION HEIGHT COUNT L1 L2 L3 L4A L4B L5 L9A Accent Wall/Canopy @ Entry Door Cubbies MILLWORK FLOORING: ECORE Ecosurfaces Cork/Rubber flooring 2.June.2013 FIFTH GRADE AXON VIEW Plywood veneer panels STUDENT TABLE COMPUTER TABLE BOUND CARPET RUG TEACHER'S CHAIR TEACHER'S DESK 2 DRAWER LATERAL FILE STACKABLE CHAIR 22" 27" 15" 24 4 2 1 1 1 28 FIFTH GRADE - CASEWORK SCHEDULE TYPE DESCRIPTION HEIGHT COUNT F1 F2 F3 F4A F6 BASE CABINET 45" CUBBIES WALL SHELVING SMART BOARD Wilsonart Laminate to match KI Millwork Laminate Countertop colors APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL 2' - 3" 3' - 0" 2' - 3" 4' - 0" 2 24 3 2 1 | Design Narrative | 1/8" = 1'-0" Classrooms FIFTH GRADE FURNITURE PLAN C8 ISTUDIO architecture | design | planning
  26. 26. Civil Recommendations Mechanical Recommendations Electrical Recommendations New 6”-8” sanitary sewer connection(s) will be located on the south face of the new building addition and directed towards the 14th Street right of way. New water service (domestic and fire) will be located on the west face of Building B, 1929 at the location of the existing Basement Utility room, routed around the south side of the cottage, and directed toward the 14th Street right of way and. During Building C work the existing 2” gas line may be kept in service. The new building may require new electric and telecommunications ductbank(s). The design team evaluated four different mechanical systems for performance maintenance and cost. The new incoming electrical service must be upgraded in Phase 1 to support new HVAC systems and the new addition buildings. The entire existing power distribution system must also be removed and replaced/upgraded as required. Some branch wiring panels shall be reused. Structural Recommendations The new buildings will be founded on deep foundations similar to the 1920’s and 1950’s construction. The proposed system is helical piers driven 25-30 feet below grade with pile caps. The ground floor slab will be a structured slab that will span between concrete girders and beams, supported on pile caps. The concrete stairs and ramps to the south of Building C will be similarly structured. These slabs will be formed though not supported on fill material to meet the required elevation. The primary structural system will likely consist of structural steel columns supported on cast-in-place concrete pile caps. Steel girders will span between steel columns to create a grid of structural bays. The second floor will likely consist of a concrete slab on metal deck spanning between steel beams spanning from exterior to the corridor and assumed at approximately 18 inches deep. The roof deck will likely consist of a metal roof deck supported on open-web steel roof joists. Exterior walls are expected to consist of metal stud walls with a large extents of glass. Metal panel rain screen façade will be supported by the stud walls. These exterior walls will likely be supported on grade beams spanning between pile caps. The lateral system will consist of steel braced frames. Interior elements would be integrated with corridor and classroom walls. An interim mechanical system for Building A, 1959 is to replace the unit ventilator two-pipe system with hot water provided by the existing boilers (converted to hot water boilers) and chilled water provided by new air-cooled chiller. In Building A this system will allow for the best performance for the best value with the least disturbance of existing infrastructure since existing pipes, intakes, and boilers can be reused. The existing fire alarm system should be replaced; however, it is acceptable for the contractor to selectively replace components of the system to correct deficiencies. The lighting upgrade should be carried out in the respective phases of construction. It is recommended that the occupancy sensors be used with dual override switches to control all interior non-emergency lighting in the building, mainly the offices and classrooms. The exterior lighting will be controlled via a combination of photocell and time clocks, wired via a contactor panel. Where applicable, the existing convenience receptacles will be reused, provided they are in a proper working condition and are a grounded type. New 20 amp grounding type duplex convenience receptacles will be provided on an as needed basis for the new space layout. The proposed natural ventilation system for Building A, 1959 is similar to Building B, 1929. On mild weather days green notification lights will illuminate in the classrooms indicating that conditions are right to open the windows. The classrooms will be vented to plenum spaces that are to be linked to the corridors and up to rooftop monitors and fan systems. When possible the exhaust ventilation system will function passively, otherwise fans will come on to mechanically assist. The proposed natural ventilation system for the addition Building C uses solar chimneys. These structures take advantage of solar heating at the top of the chimney and prevailing wind dynamics to passively draw air out of the classrooms. An indicator light will come on in each classroom when conditions are right to open the windows. Turbines will be located in the solar chimney to mechanically supplement the system as required. Dampers will prevent downdrafts. Building Systems Site grading will include the new building addition and surrounding play surface area improvements, the ADA ramp along Upshur St NW, new site parking lot, and service access improvements. In the main electrical room, two new fused safety switches will be planned, one for the emergency power distribution system and another for the fire pump. | Design Narrative | A series of new storm drain pipe system(s) will be introduced throughout the site to safely convey the runoff (generated by the new improvements) and connect to the existing storm drain network. We anticipate the storm water quantity control system to consist of a new underground system with a 36” – 48” CMP piping network built underneath the play area and various check dams or swales surrounded by vegetation. There may be other options available to provide quantity control such as a new cistern system. Proposed quality control improvements at the parking areas include StormFilter like structures. The proposed mechanical system for all buildings is a Variable Refrigerant Volume system (VRV) with Dedicated Outdoor Air System (DOAS). This system will avoid cutting intake louvers into the existing historic brick facade of Building B, 1929. The condensing units of the VRV systems are to be located on the flat roofs of Building A and Building C. The DOAS will be installed in the attic of Building B,1929 and ducting will be located in existing shaft spaces perhaps using existing ducts. On mild weather days (monitored by rooftop weather stations and defined by outside temperature and humidity) the natural ventilation system will run passively. A green notification light will illuminate in each classroom indicating that the VRV and DOAS need not run and that conditions are right to open the windows. The rooms in Building B, 1929 are currently linked to shaft spaces that open to the attic. The existing cupola vents the attic which will in turn draw air from the classrooms through the shafts thereby promoting fresh air flow through the classrooms when the windows are open. The classrooms in Building C will have access to solar chimneys. There will be a backup fan system to supplement the passive system as required. C9 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  27. 27. Plumbing Recommendations IT/AV/Security Recommendations Food Service Recommendations A full video auger scan of the existing sanitary mains shall be requested to assure that all lines are clear and not damaged. The proposed future addition shall require new sanitary waste tap to street sanitary main. Every group restroom shall have a new floor drain installed for emergency purposes. All toilet room fixtures shall be replaced with new units, and associated low-flow flush valves and faucets. Telecom Rooms should be well lit, environmentally conditioned spaces dedicated to low voltage equipment. The current location and arrangement of telecom equipment is not suitable to a modernized school, and new telecom rooms should be established. Classrooms shall contain low voltage pathways allowing for a neat and orderly installation of data, telephone, audiovideo and intercom distribution cabling. The space required for the new kitchen and serving area functions is approximately 1,500 SF. The space will consist of receiving, a toilet room, employee lockers, dry storage room, refrigerated / frozen storage (walk-in), food preparation area, food production area (cooking), serving line with two point of sale stations, foodservice office with view of serving line and seating area, warewashing and soiled dish drop off window, and storage / staging area for prepared meals. The incoming domestic water supply is sufficiently sized for the school demand. The condition of the valves and associated piping inside the structure is poor, with an upgrade needed for a new backflow prevention device along with all downstream domestic piping. Classrooms should have outlets at the Teacher station for a PC, Voice-over-IP phone and possible IP-enabled accessory (printer, etc.). Classrooms should have outlets located on the teaching wall for a wall mounted projector, 4-6 outlets at the back/side of the room for student PCs and other IP-enabled devices, and an outlet to enable a wireless access point. The video distribution system should be capable of supporting all standard formats to display images on demand at every classroom. Space and power should be allocated for a SMARTBoard or Promethean interactive whiteboard in all classrooms. A sound reinforcement amplifier and DVD player should be located on a wallmounted shelf in close proximity to the Teacher’s station. Classrooms not receiving an interactive whiteboard should include a projector and pull-down screen. Every classroom should contain a clock/speaker assembly in good working order located in a consistent location in all classrooms. Depending on the future layout of the new addition more storm leaders and drains will be necessary to convey storm water. A new tap to the street main will be required to convey the added roof runoff from the new addition. The current condition of the gas service and associated piping is in good condition. The mechanical equipment upgrade may require new gas piping to be routed through the structure to supply natural gas to these units. A new fire service shall be installed to serve Powell Elementary. Coordination with the DC Fire Marshal is required to determine the range of systems, and allow for the sprinkler installation at the future addition only. Exterior doors shall be wired with door sensors, and sensitive areas shall contain motion sensors with appropriate zoning. CCTV cameras should be located in vandal-proof smoked domes throughout the facility. Cameras should cover strategic areas, including points of egress, corridor junctions, stairwells, exterior vestibules, main office, computer lab, auditorium, and multi-purpose room. The cafeteria and multi-purpose rooms shall have an auxiliary sound system including rack or cabinet mounted electronics consisting of pre-amplifiers, mixers, program sources, equalizers, amplifiers, wireless microphone inputs, assistive listening stations, and storage space for microphones. The multipurpose room should also contain a large format LCD projector and screen appropriate for the space. Building Systems The storm system serving the original 1929 structure (Building B) shall be detached from the sub-slab combined sewer. New storm piping shall be installed and coordinated with the civil engineer to route associated downspouts and area drains separately from the sanitary waste. The storm system for the 1959 addition (Building A), much like the sanitary shall be snaked and tested for leaks and cracks. Existing roof drains may require replacement due to age. | Design Narrative | The existing domestic hot water system shall be removed and replaced. The facility shall have access to the loading dock and the dumpsters / recycling area. The space shall have direct access to the cafeteria seating area. The dining area shall have direct access to self bussing trash area and the warewashing drop off window. All architectural finishes and surfaces shall be durable and easily cleanable to meet the requirements set forth by DCPS and the Department of Health. C10 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  28. 28. The project scope calls for the existing Powell Elementary School Building to be expanded to include a new addition to be built on the west side of the existing Building B, 1929 building. This work will be performed in phases as part of the Master Plan in which the first addition will consist of a 13,500 s.f. building addition (Building C Addition). The second building addition will occur in the future and will consist of a 24,000s.f. building addition (Building D addition). There will be other site improvements made to enhance the uses of the existing and new work being built. The improvements include but are not limited to a new ADA accessibility path along the front entrance from Upshur Street, N.W. Underground utility improvements will also be included as part of the improvements for this school. 2. EXISTING BUILDING STRUCTURE/FOUNDATION The existing building B, 1929 and the existing Building A 1959 additions will be maintained as part of these improvements. There will be minor exterior modifications required for the new Building C addition to be made. The location of the existing school structure will create a challenge in terms of having adequate access for the contractor to use. Direct vehicle access from any of the two main streets will not be possible due to the significant grade changes. The existing temporary classrooms currently located on the asphalt play area will remain in operation during this first building C addition. 3. SITE UTILITIES The adjacent roads and driveways are currently improved with the utilities required for construction, (i.e. sanitary sewer, water, storm drains, gas and electric). The new water service (domestic and fire services) will be made to the existing water line on 14th Street, N.W. The new sanitary service lateral will also be made to the existing system on 14th Street N.W. The new storm drain pipe connection(s) needed to discharge the onsite runoff will be made to the system on 14th Street N.W. The other utility connections for telephone, electric and gas will be made toward the public alley (south side of property).We do not anticipate a new utility connections to be made to the Upshur Street right of way. Review of public utility records made available did not indicate the exact location (vertical and horizontal) of utilities found within the project work limits, except for an inlet on the asphalt surface and other indiscriminant tops/covers. The horizontal location of utilities within the project limits were located and shown on the plans according to available records. The horizontal location of gravity systems is indicated on the existing conditions plan based on record data and/or field observation. However, the vertical location of the non-gravity 2.June.2013 The following is a summary of utility services and how they will be implemented: Sanitary Sewer – New 6”-8” sanitary sewer connection(s) will be located on the south face of the new building C addition and directed towards 14th Street right of way. The 6”-8” PVC lateral connection(s) will be made to the existing 15” sanitary sewer line that runs in a north-south direction along 14th Street. The length of run for the sanitary service(s) is anticipated to be 250l.f. Water Line–New water service (Domestic and Fire) will be located on the south face of the new building addition and directed toward the 14th Street right of way. The alignment of the new water tap will be made so as to not impact the existing temporary trailers. Therefore the new water service lines will run in an east-west direction to allow the waterline to enter the current water meter area inside the building B 1929 basement. The size of the domestic water service is anticipated to be 4” DIP Class 52. The size of the fire water service is shown to be 8” DIP Class 52. Other water line work may also be needed as it relates to new fire hydrant(s) to new locations that are better suited with the new improvements. The length of run for the water service(s) is anticipated to be 250l.f. A water meter vault as well as a back flow preventer(s) will be installed as part of the new water line improvements. Gas Line – The existing gas service that originates along 14th Street may need to be rerouted as part of the improvements indicated on the Master Plan. However, during the first addition work this existing 2” gas line may be kept in service. The existing gas main runs east to west from 14th Street directly into the existing building B. The point of connection for the new gas service is not known at this time. We are in the process of determining if it is a high or low pressure system. Electric Service – There are various electric ductbanks that run along the rear public alley which serve the light poles and building main service. The existing electric service is believed to be routed toward the public alley where the underground ductbanks and electric manholes are found to exist. This system will remain in operation during the building C addition phase of work. The new building will require new electric ductbank(s) primary and secondary to and from new pad mounted electric transformer(s). The location of these electrical systems is not known at this time. New light poles may be required to provide adequate safe areas around the site. Refer to electrical engineers narrative for more detailed information. APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL Civil Assessment 1. PROJECT INTRODUCTION systems, (i.e. gas, telephone, electric, etc) was not field verified and are only shown per records made available. Therefore, the absence of either as-built plans or field test holes will require the contractor to engage in some type of exploration for non-gravity utility systems in advance of engaging new utility/site work. The contractor will need to get involved in conducting test pit(s) to determine the actual depth of the non-gravity systems located within the project work limits. This is needed in order to assure clearances are adhered between new and existing utilities. | Detailed Reports | Civil Assessment D1 ISTUDIO architecture | design | planning
  29. 29. A full engineered sediment control application will be required to be filed to the DDOE for review and approval. 5. STORM DRAINAGE A series of new storm drain pipe(s) system(s) will be introduced throughout the site to safely convey the runoff (generated by the new improvements) and connect to the existing storm drain network. The pipe sizes will vary from 6” to 18” Dia. depending on the drainage area and purpose of the pipe(s). There is an existing storm drain grate inlet located along the northern edge of the asphalt play area that accepting runoff which has filled up with silt/debris and outlet pipe cannot be determined. We intend to keep this inlet in place and use it as our point of discharge provided it has the adequate inverts to discharge properly. The point of connection for the new storm drainage system will be this structure unless field conditions dictate otherwise. It is very possible that a new storm drain connection to the existing 18” Sewer located in public will be required. The new ADA handicap ramps and other impervious surface improvements will require the installation of trench drains to receive the runoff and will be directed toward a nearby LID system or small quality treatment structure (WQS-1) consisting of StormFilter MH type of device to treat the localized runoff. The main parking area and service access will need to be graded to drain to a low point where a series of trench/inlet type structures will direct the runoff towards another localized LID system or Stormfilter MH type structure. The top/slab(s) of the storm structures will need to be designed to allow H-20 type loads. There are very limited inlets/structures found within the parking lot and play surface areas. The new building C addition area as well as the remaining play areas may be subject to localized ponding whenever storm events occur that are greater than the 15yr storm event. In such instances new structure(s) will be introduced at key locations to serve as an emergency spillway to convey surface runoff and direct it away from the building and toward the nearby stormwater system(s) of adequate capacity to handle the additional runoff. The public alley located in the back of the site will present a challenge in terms of providing adequate surface drainage relief. The current site conditions indicate the surfaces to be inadequate and in need of maintenance/repair. Unfortunately the cost for such effort may prove too high to include it as part of the first addition work. Our recommendations will include minimal repairs and 2.June.2013 6. STORMWATER MANAGEMENT A review of the District of Columbia’s Department of the Environment (DDOE) related to the Stormwater Management (SWM) requirements for this project will require SWM Quantity &Quality Control for the impervious area created by the proposed building and associated improvements. We anticipate the quantity control system to provide for this project to consist of a new underground system consisting of 36” – 48” CMP piping network built underneath the play area. There may be other options available to provide the quantity control required by DDOE including but not limited to surface check dams along the perimeter of the site which may be surrounded by vegetation. Another method to provide some quantity control could be the use of a new cistern system that will be used to service the building. It is our understanding based on recent experience that DDOE will allow a cistern to hold the required volume provided it does not receive any untreated runoff from parking lots/streets/driveways that may be carrying grit and oils. We primarily intend to direct the drainage of any driveway/parking areas to a water quality treatment structure before it is piped into the cistern. DDOE views any parking/loading surfaces as the primary target areas that are subject to many types of pollutants and forms of debris (solids as well as in liquid form such as oil, chemicals) that will enter the trench drain. To minimize the impact the runoff will have on the new WQS structure, a pre-treatment structure will be introduced to treat oil and grit being generated. The manhole structure will have a permanent 3’ deep water pool at the bottom. Civil Assessment 4. EROSION AND SEDIMENT CONTROL overlay to minimize low ponding areas. Any new parking that may be sited along the alley will be evaluated to make sure it meets DDOT and DCRA regulations. As previously mentioned the storm quality treatment will be provided by introducing StormFilter like structures along the asphalt pavement surfaces that are subject to vehicular traffic. One main structure (Stormfilter type) is anticipated to be sited to handle most of the new impervious work. It will be placed at a location sufficiently enough to enable a gravity system to discharge into the existing sewer system. The StormFilter structures will be sized to meet the minimum requirements of the DDOE regulations. The preliminary size of each of these precast treatment structures is 9’ wide x 17’ long and 8’ high. Each structure will contain approx. 8-18 cartridges filled with selected materials for treatment purposes. | Detailed Reports | Telecommunications – A new telecommunications ductbank running parallel with the new electrical ductbank will be required as part of this construction. A new telephone manhole may be required to be constructed near the elec. /telephone room. The location of an existing telephone manhole is not yet known but, further investigation will be required to confirm the existing service location. The StormFilter structures will be sized to not only meet the minimum requirement of the DDOE but, also meet the LEED certification criteria. Some of the roof areas may be green and may receive some form of irrigation from a new cistern. It is not clear at the moment what percentage of the roof may be green but if is feasible a cistern will be sited for irrigation purposes. A preliminary size of the cistern is anything between a 15,000 - 30,000 gallon tank. 7. SITE GRADING & AMENITIES APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL D2 ISTUDIO architecture | design | planning
  30. 30. The project site area will comprise of four components that will consist of the following: 1. The new building C addition (13,000 s.f) and surrounding play surface area improvements (First Addition) 2. The ADA ramp connectivity from public areas to the front of the existing building and new building C addition (First Addition) 3. New site parking lot and service access improvements (First Addition) 4. New access to site area and Security Fencing/Gate required (First Addition) Each of these components will require certain key site conditions that should be included as part of the cost analysis. The following is a brief list for each component: iv. v. Excavate an average of 3’ to meet FFE of building. Pavement surface to be heavy duty pavement for vehicular areas. Install water, sewer, storm drain, elec. tel, quality/quantity structures and meter/valve(s) Remove any fill material within work area not suitable for use. Confirm condition of existing gravity systems and provide videotape for justification of reuse with agencies. Clean all structures as needed to justify condition of pipe(s). 2. ADA Handicap Access i. ii. iii. Existing exterior steps along Upshur Street to be altered as needed to adapt a new handicap ramp. Build new ADA ramp connection along northern face of building mass. Construct railing and minimum landscape vegetation along walls. 3. Driveway w/ parking i. ii. iii. iv. Heavy duty Asphalt pavement section for entire driveway. Limited excavation is needed for the driveway (almost at grade) Concrete curb and sidewalk, lighting and gates needed. Select Fill material will be needed where the poor soils are found.. 4. Access Drive/Entrance i. ii. iii. iv. Clearing and demolition of items will be required. Limited excavation will be required. Access area is at grade. New access gate may be required along public alley. Lighting and security fence (8’ high wrought iron fence) needed. | Detailed Reports | i. ii. iii. Civil Assessment 1. New Building C Addition (13,000 s.f.) D3 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  31. 31. | Detailed Reports | Civil Assessment Civil Assessment D4 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  32. 32. Structural Assessment Foundations: Per the project geotechnical report, the new building will be founded on deep foundations similar to the 1920's and 1950's construction. Driven piles must be avoided due to the adjacent school and other buildings. Fasteel Helical Anchors or Auger Pressure Grouted Piles are the two most likely options, installed to a depth of approximately 25 or 30 feet. Per the project geotechnical report, the ground floor slab will be a supported slab (thicker than a typical slab-on-grade and more heavily reinforced) spanning between concrete girders and beams, supported on pile caps and the piles noted above. Consideration will be given to locating and constructing all piles for the Addition Building D during the Addition Building C construction. Alternatively, piles and piles caps along Addition Building C/D intersection lines should be designed for future loads from Addition Building D. The second floor structure will consist of a 3” normal-weight concrete slab over 1-1/2” 20GA metal deck (assumed total depth of 4-1/2”) spanning between 24” open-web steel joists spaced at 5’ on center and spanning from exterior to the corridor. 18” open-web steel joists will span across the corridor. The vibration performance for these joists is a concern and further study will be required. The roof structure will consist of a 2” normal-weight concrete slab over 1-1/2” 20GA metal deck (assumed total depth of 3-1/2”) spanning between 20” open-web steel joists spaced at 5’ on center and spanning from exterior to the corridor. 18” open-web steel joists will span across the corridor. Additional structural steel wide-flange beams will be required at the roof to support mechanical units and chimneys (see below for further discussion). The lateral system will consist of steel braced frames. Transverse frames will be located at selected classroom dividing walls. Longitudinal frames will be located along the interior corridor wall, and oriented to allow doors for classroom access. Narrow braced frames (configured to allow large extents of unimpeded glass windows) or moment frames may be required along the building north elevation. A lateral joint of approximately 2” to 3” at the interface with existing Building B is required. The joint will occur at floor and roof slab levels as well as at exterior walls, with architectural joint covers used to bridge the joints. Superstructure: The primary structural system will consist of structural steel columns supported on a deep foundation. Steel wide-flange girders will span between steel columns to create a grid of structural bays. | Detailed Reports | Building Codes: International Building Code (IBC) 2006 per Washington DC current requirements. ASCE7-05 “Minimum Design Loads for Buildings and Other Structures” as referenced in IBC 2006 Live Loads (psf = pounds per square foot) 1. Classrooms = 40 psf 2. Corridors above first floor = 80 psf 3. First-floor corridors = 100 psf 4. Lobbies = 100 psf 5. Stairs = 100 psf 6. Roof = 20 psf or snow load Structural Assessment Building C, Addition: D5 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  33. 33. Non-Structural Elements: Exterior walls are expected to consist of cold-formed steel (metal stud) framing with large extents of glass. At heavier brick cladding (potentially along the north face of the building to match the existing structures), masonry backing walls may be used. Two or three solar chimneys are expected to be located at the roof, constructed of a structural steel angle braced frame and clad with coldformed steel “furring” and architectural finishes. The chimneys are expected to be squares with sides of 2’ to 3’ and extend approximately 10’ above the roof level. New mechanical units will be located at grade, not on the roof of Building C. The majority of the remaining roof area will be a green roof. At present the green roof system is assumed to weigh approximately 40 pounds per square foot (psf). At the building’s south elevation, a perforated metal panel solar screen is to be constructed. The screen would be supported by a structural steel frame cantilevering out at floor and roof levels of the building. Thermal isolation/break would be provided by using bolted connections and a product similar to Fabreeka’s Thermal Insulation Material. New open stairs are to be constructed at the west end of the addition. Building Codes: See Building C, above. Slight modifications may be required as the local authority having jurisdiction prepares to move to a new version of the IBC. Foundations: Similar to Addition Building C, the new building is expected to be founded on deep foundations (see above for further information) Similar to Addition Building C, the ground floor will require a supported slab (see above for further information). Consideration should be given to the interface between Addition Building C and Addition Building D with respect to prior design consideration of Addition Building D pile locations and design loads. Superstructure: The primary structural system is expected to consist of structural steel columns supported on a deep foundation. Steel wide-flange girders will span between steel columns to create a grid of structural bays. The second floor structure will consist of a 3” normal-weight concrete slab over 1-1/2” 20GA metal deck (assumed total depth of 4-1/2”) spanning between open-web steel joists spaced at approximately 5’-0” on center. The vibration performance for these joists is a concern and further study will be required. The roof structure will consist of a 2” normal-weight concrete slab over 1-1/2” 20GA metal deck (assumed total depth of 3-1/2”) spanning between openweb steel joists spaced at approximately 5’-0” on center. Additional structural steel wide-flange beams will be required at the roof to support mechanical units. The lateral system will consist of transverse and longitudinal steel braced frames, locations to be determined. Narrow braced frames (configured to allow large extents of unimpeded glass windows) or moment frames may be required along the exterior building elevations. Structural Assessment Alternatively, provided that minor settlement can be allowed for this patio, an alternate system without deep foundations can be constructed. The process is further described in the project geotechnical report, but can be summarized as removal of approximately 2.5 feet of soil and replacement with a geogrid mat and various of layers of graded stone up to the slab subgrade level. Addition Building D: | Detailed Reports | Site Exterior Slab/Stair/Ramp The proposed patio, stair, and ramp located between Addition Building C and Addition Building D will be a concrete slab supported on concrete piles, similar to the building ground floor slab, as described above. D6 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  34. 34. Phase 1 Modernization: No structural work anticipated. Phase 2 Modernization: No structural work anticipated. Phase 3 Modernization: Stairs at the northwest corner (adjacent to the new addition’s interior stair) of Building B (constructed 1929) are expected to be infilled to create additional floor space. Infill framing would consist of concrete fill on metal deck spanning between steel beams anchored into the existing structure. The roof structure (including attic space) of Building B may have capacity for isolated light-weight units only. VRV cassettes will be supported at and penetrate the existing plaster ceiling. The existing mechanical unit located in the Building B attic directly below the cupola is expected to be replaced with a DOAS (dedicated outdoor air system) unit of approximately the same size and weight. The capacity of the existing framing to support this load is to be verified. A fan may be located at part of the cupola opening as part of the Phase 1 renovation, before the DOAS is added in a later phase. Structural Assessment “Non-Structural” Elements: Exterior walls are expected to consist of cold-formed steel (metal stud) framing with large extents of glass. At heavier brick cladding, masonry backing walls may be used. Due to the DOAS’ large dimensions, careful consideration should be given to the method for placing it in the existing attic space. Assembling from smaller components within the attic may be necessary and/or a new opening in the gable end wall of the existing brick masonry may be provided. This opening would likely be required as a louver in any case. VRV condensers (approximately 6’ by 6’ and weighing 1500 pounds) may need to be located at the roof of Building A (constructed 1959). It is expected that the units could be located directly over concrete columns to avoid the need for strengthening of the existing slab. Alternatively, steel platforms could be constructed to span between existing concrete columns and avoid loading the existing roof structure at all. New openings through existing concrete floor and roof slabs should be sized and located to avoid concrete joists. New openings through existing hollow-clay tile partitions walls are also possible, but may turn out to be troublesome due to the weak (and often damaged) nature of these walls. Replacement of some or all of the walls (at least at the 2nd floor where damaged) with new metal stud partitions may be worth considering. Careful study should be made as to the insulation of the existing brick walls due to potential negative effects on masonry. | Detailed Reports | A lateral joint of approximately 2” to 3” at the interface with existing Building B and with Addition Building C will be required. The joint will occur at floor and roof slab levels as well as at exterior walls, with architectural joint covers used to bridge the joints. D7 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  35. 35. Mechanical Assessment INTRODUCTION equipment (see 2011 ASHRAE Handbook – HVAC Applications, Table 4 – this table is provided in Appendix A of the present report); they should last ten more years. Enclosed is the M/E/P/FP existing conditions assessment, design recommendations and preliminary design information for the Powell Elementary School project. The existing building consists of the original building built in 1929 and hereafter designated “Building B, 1929”, and a previous addition built in 1959 and hereafter designated “Building A, 1959.” A louver located on the east side wall of the Boiler Room provides combustion air to the room. The existing building will be renovated following three phases of modernization. Two new additions are planned. Building C, Addition is slated for construction at the same time as existing building Phase 1 Modernization. Building D, Addition is expected to be built during existing building Phase 3 Modernization. 2.1 The Boiler Room also houses three steam vacuum pumps (for steam/condensate return, with one in stand-by), probably installed in 1959 (Photo M-5). Hot water is distributed to Building A, 1959 using two hot water pumps (Photo M-4): MECHANICAL Existing Conditions In assessing the condition of the equipment, the following four ratings (inspired from the Facility Condition Index) are used: Good, Fair, Poor, and Unsatisfactory. General equipment conditions are categorized as follows: Unsatisfactory: Equipment has no useful life remaining and has to be replaced immediately. Poor: Equipment has minimal useful life remaining, due to extreme age, wear, or insufficient maintenance. Failure or unreliable operation can be expected, or is already occurring. Fair: Equipment is generally well maintained, and can be expected to operate reliably throughout its remaining service life. Good: Equipment is well maintained, and can be expected to operate reliably beyond its remaining service life. 2.1.1 Manufacturer: TACO; Model: FE2007E2B1E2L0A; Capacity: 125 GPM; Head: 38 ft.; Motor size: 2 HP; Manufacture Date: 1996. All pumps appear to be in fair condition. Finally, the steam piping to the radiators in Building B, 1929 appears to be in poor condition. The hot water piping to the unit ventilators and convectors in Building A, 1959 appears to be in fair condition. Heating Systems The buildings are heated with steam and hot water produced in a Boiler Room located in the basement of Building B, 1929 (Photo M-1). Steam and hot water are distributed to the building systems through piping in a crawl space adjacent to the Boiler Room (Photo M-2). Steam is produced by two dual-burner (natural gas, fuel) steam boilers (Photo M-3) whose characteristics are: Manufacturer: A.L. Eastmond & Sons Inc.; Model: FST 70; Serial: 8512 for one, and 8513 for the other; Gross output: 2,343 MBH each; Combustion efficiency: 80%; Steam pressure: 15 psi (characterized as low-pressure steam). Photo M-1: Boiler Room Photo M-2: Steam and Hot Water Piping Distribution in Crawl Space These boilers were not in operation at the time of survey, but appear to be in fair condition. They were manufactured in 1996, and based on a median service life of 25 years for such 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL Mechanical Assessment 2. Hot water is produced from the steam with a Hot Water Converter, which is a heat exchanger with steam on one side, and water on the other side (Photo M-6). The converter was probably installed in 1959, with the previous addition. It produces about 76 GPM of hot water, at around 20oF Delta, which is equivalent to a capacity of about 760 MBH. This hot water converter appears to be in fair condition. | Detailed Reports | 1. D8 ISTUDIO architecture | design | planning
  36. 36. Photo M-7: Window AC Unit in Cafeteria/Gym Photo M-5: Vacuum Pumps 2.1.2 2.1.3 Cooling Systems Throughout the buildings, all cooling is done using window AC units (about 2 tons each). Most units (Photos M-7 to M-10) are of make Friedrich, some are from Frigidaire, and some are from Comfort Aire (Aitons). These units were probably installed starting from 2008, and appear to be in good condition. Photo M-8: AC Unit in Cafeteria/Gym Photo M-9: AC Unit in Cafeteria/Gym Photo M-6: Hot Water Converter Mechanical Assessment Photo M-4: Hot Water Pumps Photo M-10: AC Unit Plate Air-Side Systems The classrooms are provided with steam radiators in Building B, 1929 and unit ventilators (Photo M-11) in Building A, 1959. The unit ventilators are connected to openings on the side walls for ventilation (Photo M-12). Due to the nature of its heating systems, Building B, 1929 receives no mechanical ventilation during the heating season. Cooling is provided by AC window units for all classrooms. Exhaust fans (of make Broan) with wall switch control are located in toilets of Pre-K and Kindergarten classrooms. There is no direct ventilation in the corridors. Also, they do not receive air conditioning (Photos M-13 and M-14), except on perimeter walls (Photos M-15 and M-16). | Detailed Reports | Photo M-3: Steam Boiler D9 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  37. 37. Restrooms are heated through radiators and convectors (Photos M-17 and M-19). They are exhausted through two fans located in the attic for Building B, 1929 and two fans in roof for Building A, 1959 (Photos M-18 to M-21). The overall condition of the air-side systems is fair. Additionally, there exists a natural ventilation system in Building B, 1929, with openings in classrooms (Photo M-22) ducted to the attic (Photo M-23) where a large fan (Photo M-24) rejects the air drawn from the classrooms to the exterior through the cupola. However, the fan is no longer working. Photo M-17: Steam Radiator in Building B, 1929 Restroom Photo M-20: Louver Door in Building A, 1959 Restroom Photo M-12: Ventilation Opening for Unit Ventilator Photo M-14: Corridor in Building A, 1959 | Detailed Reports | Photo M-13: Corridor in Building B, 1929 Photo M-18: Exhaust Grille in Building B, 1929 Restroom Photo M-19: Convector and Exhaust Fan in Building A, 1959 Restroom Photo M-11: Unit Ventilator in Classroom Photo M-16: Unit Ventilator in Building A, 1959 Corridor Mechanical Assessment Photo M-15: Steam Radiator in Building B, 1929 Corridor D10 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  38. 38. The warming kitchen is heated with a steam radiator and cooled with a window AC unit (Photo M-25). An exhaust fan is dedicated to this room (Photo M-26). Photo M-22: Opening in Classroom to Attic for Natural Ventilation Photo M-25: Window AC Unit in Kitchen Photo M-26: Exhaust Fan in Kitchen HVAC System Options Various options are available. They are described below. All the options assume that perimeter heating is provided by the existing radiators (converted to hot water radiators) and hot water convectors in the existing buildings. To that effect, the steam piping in Building B, 1929 will be replaced with new hot water piping. 2.2.1 D.C. Public School Design Guidelines and LEED Scorecard The recommended mechanical system will be designed in accordance to the D.C. Public School guidelines and design parameters as summarized in the following table. Table M-1: DCPS Guidelines and Design Parameters Item # 2.1.4 Photo M-24: Fan in Attic for Natural Ventilation in Building B, 1929 Classrooms Administration and Support Areas All administration and support areas, and the lobby are heated with radiators/convectors and cooled with window AC units. As a result, there is no mechanical ventilation in the heating season. 2.1.5 Winter Temperature Summer Temperature Humidity 3 Air Changes Outdoor Air Ventilation Cafeteria/Gym Design Parameters 68.5oF to 75.5oF 74oF to 80oF 30% to 60% Relative Humidity 6 to 10 per Hour Parameter Notes EPA 2000 & ASHRAE 55-04 EPA 2000 & ASHRAE 55-04 ASHRAE 6 7 Air Filtration Carbon Dioxide Levels HVAC Background Noise Level 10 CFM per Person + 0.12 CFM/ft2 of Area MERV 13 4 5 The cafeteria/gym is approximately 2,400 square feet and is currently heated with steam radiators and cooled with window AC units (Photo M-7). Here also, there is no mechanical ventilation in the heating season. 2.1.6 1 2 Photo M-23: Shaft in Attic for Natural Ventilation in Building B, 1929 Classrooms Category LEED ASHRAE 52.2-2007 & ASHRAE 62.1-2007 MERV 6 to 8 Below 700 PPM Above Outdoor Air ASHRAE 62.1-2007 RC(N) Mark II Level of 37 ASHRAE Handbook Chapter 47 Warming Kitchen Mechanical Assessment 2.2 | Detailed Reports | Photo M-21: Exhaust Fans in Building A, 1959 Roof D11 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
  39. 39. The LEED credits achievable for the school Additions with this type of system are listed in the following table, which is based on experiences with renovations and new constructions that the design team has accrued while working on D.C. Public School projects and other projects that sought LEED certification. Simplicity: Heating, cooling and ventilation achieved from RTU located on roof and associated VAV terminal units for the Additions. Minimal noise concerns: VAV terminal units located in corridor ceiling space away from classrooms. Historic character considerations: No openings on exterior walls of Building B, 1929 required. Table M-2: Applicable “Mechanical” LEED Prerequisites/Credits Achievable Title Y N ? N/A Points Possible EAp2 Fundamental Commissioning of the Building Energy System Minimum Energy Performance EAp3 Fundamental Refrigerant Management Y EAc1 Optimize Energy Performance 2 1 – 19 EAc3 Enhanced Commissioning 2 2 EAc5 Energy and Atmosphere Enhanced Refrigerant Management Subtotals IEQp1 Y - Y - 1 4 - 1 - 22 of 33 IEQp3 IEQc1 Outdoor Air Delivery Monitoring IEQc2 IEQc7.1 Increased Ventilation Construction IAQ Management Plan – During Construction Construction IAQ Management Plan – Before Occupancy Controllability of Systems – Thermal Comfort Thermal Comfort - Design 1 1 IEQc7.2 Thermal Comfort - Verification 1 1 IEQc3.1 IEQc3.2 IEQc6.2 Subtotals 2.2.2 Ductwork distribution with VAV terminal units will require new ceilings in Building B, 1929. Possible structural issues and increased costs for locating equipment on the roof of Building A, 1959. Higher first cost versus Option 2. Equipment may be visible on roof with possible historic concerns. Less efficient than Options 3 and 4. 1 Minimum Indoor Quality Performance Environmental Tobacco Smoke (ETS) Control Minimum Acoustical Performance IEQp2 Indoor Environmental Quality Disadvantages - EAp1 Y - Y - Y 1 2.2.3 Install new four-pipe unit ventilators (UV) with hot water and chilled water coils or new twopipe UV’s. Retain existing window AC units for cooling. Chiller and chilled water distribution to be installed with Addition. 1 1 1 1 Advantages 1 1 1 1 4 2 Least expensive option. Ductwork distribution system not required. Simultaneous cooling and heating capability if four-pipe system. Minimal disruption: Can be installed one classroom at a time. Easily adaptable with existing heating systems and also future master plan central cooling and heating plant. 1 1 - 7 of 19 Disadvantages Must use existing window AC units for cooling until future chilled water system is in place. Ventilation air openings similar to Building A, 1959 will be required for new UV’s at Building B, 1929: Possible historic character issue. Noisier compared to units located outside of space. Option 1: Variable Air Volume Rooftop Units Packaged air-cooled direct expansion VAV rooftop units (RTU) with either gas or hot water heating in the unit serve the buildings. One unit serves the Additions; and there may be two separate units serving Building B, 1929 and Building A, 1959, or a single larger unit serving both buildings. The VAV boxes (located in corridors) will be fan-powered with hot water or electric heat to handle all the heating loads in the Additions, and the remaining heating loads in the existing buildings. This option assumes that new ceilings will be installed in Building B, 1929. The rooftop unit(s) serving the existing buildings will be located on the flat roof of Building A, 1959. Advantages Less maintenance: All air system (no additional boiler(s), pump(s) required). Option 2: Unit Ventilators 2.2.4 Option 3: Variable Refrigerant Volume and Dedicated Outdoor Air System Install new Variable Refrigerant Volume (VRV) systems using condensing units with simultaneous heating/cooling capability. Condensing units will be mounted on flat roof of Building A, 1959 for service to the existing buildings. Install Dedicated Outdoor Air Systems (DOAS) on flat roof of Building A, 1959 and/or utilize Building B, 1929’s attic space and existing vent shafts for service to the existing buildings. Condensing units and DOAS for the Additions will be installed on the roof of the same. Supplemental heating in the Additions will be electric. Mechanical Assessment Prerequisite/ Credit | Detailed Reports | Credit Category D12 2.June.2013 APPROVED SCHEMATIC DESIGN - POWELL ELEMENTARY SCHOOL ISTUDIO architecture | design | planning
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