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1. 1
International Seismic Application Technology
Engineered Seismic Bracing Systems
and Services
2007 CBC SEISMIC DESIGN
REQUIREMENTS FOR DISTRIBUTED
UTILITIES
2. 2
Introductions
Fremont Engineering Office
Jon Gregg, P.E. â Regional Manager: 8 years
Shannon Rose â Director of Engineering: 10 years
Tim Lindfelt â Engineering Manager: 7 years
3. 3
Company Background
Involved in OSHPD construction > 15
years
11 branch offices across United States
Division of Tomarco Contractor Specialties
Strategic Partners with the following
companies:
o California Dynamics
o Anvil International
o PHD Manufacturing
o Powers Fasteners
o Miro Industries
o VICO Software
5. 5
Los Angeles, CA (HQ)
San Francisco, CA
San Diego, CA
Sacramento, CA
Phoenix, AZ
Las Vegas, NV
Portland, OR
Seattle, WA
Salt Lake City, UT
Denver, CO
Charlotte, NC
Atlanta, GA
New York, NY
San Juan, Puerto Rico
ISAT Office Locations
ISAT is opening additional offices in geographic regions where
building code compliance for nonstructural seismic restraints is
becoming more stringent.
6. 6
Recent Northern California OSHPD
Experience (Ave Project = $300m)
CPMC Davies, California,
Pacific*
CHOMP
Mills Peninsula Hospital
Laguna Honda Replacement
Sutter SMF Energy Center
Kaiser Antioch, Modesto &
Vacaville
Kaiser Vallejo, Santa Rosa,
Roseville, Richmond, Redwood
City, S. SF, SF, Fresno
Kaiser San Jose (Santa Teresa)
El Camino Replacement
Hospital/CUP*
John Muir Walnut
Creek*/Concord
Northbay Medical Center
St. Josephâs Eureka
PAMF CUP (Design)*
Salinas Valley Medical Center
San Jose Regional Medical
Center
San Ramon Hospital
Sequoia Hospital
St. Francis Hospital
Kaiser Santa Clara PHI & PHII
CPMC Davies, California,
Pacific
UCSF Parnassus & Mt. Zion
Good Samaritan Hospital
Kindred Hospital
Stanford Medical Center &
LPCH*
Modesto Memorial Hospital*
OâConnor Hospital
Sutter General Hospital
Washington Hospital
7. 7
Recent Northern California
Non-OSHPD Experience (Ave Project = $120m)
Solyndra FAB2
Li Ka-Shing
Pixar Studios
Western Digital B-2
Stanford School of Business
Graham Hill Water Treatment
Plant
Stanford Linear Accelerator
Skyline College
Ed Roberts School
Genentech Vacaville & S. SF
College of San Mateo
UC Santa Cruz, Davis & Berkeley
Thunder Valley Casino
Redhawk Casino
Crocker Art Munseum
Chabot College
CCSF
Brocade B-1
California Academy of Sciences
Contra Costa Courthouse
State Compensation Insurance
Fund
CALSTRS
NADEV Printing Facility
Sand Hill Hotel
San Jose & SF Airport Terminals
Munger Student Housing
Moffett Towers
One Rincon Hill
555 Mission
Lockheed Bldgs 156 & 159
Amgen Fremont
Intel SC11
Digital Realty Trust Data Centers
Equinex Data Center
Campus for Jewish Life
SF Federal Building
8. 8
Single Source Experience (MEP)
CPMC Davies, California
Mills Peninsula Hospital
Sutter Castro Valley
Alta Bates Merritt Tower
Li Ka-Shing
Kaiser Template
Hospitals
CHOMP
Stanford Linear
Accelerator
Solyndra FAB2
SF General Hospital
Laguna Honda Hospital
El Camino Hospital & CUP
Kaiser Vallejo
UC Berkeley Davis Hall
Redhawk Casino
Genentech Vacaville
Kaiser Santa Clara
Sutter SMF MOB &
Energy Center
Kaiser Roseville Campus
Kaiser South Sacramento
LPCH Oncology Remodel
9. 9
Hospital Projects
Northern California
CHOMP MEP
CPMC â California Campus MEP
CPMC â Davies Campus MEP
CPMC â Pacific Campus MEP
El Camino Hospital MEP
El Camino C.U.P. MEP
Good Samaritan MP
KAISER Antioch MEP
KAISER Folsom MEP
KAISER Modesto MEP
KAISER Redwood City MEP
KAISER Richmond E
KAISER Roseville C.U.P. MEP
KAISER S. Sacramento MEP
KAISER S. San Francisco MEP
KAISER Santa Clara â Phase II MEP
KAISER Santa Rosa C.U.P. MEP
KAISER Santa Teresa MEP
Seton Hospital MEP
KAISER Vacaville MEP
KAISER Vacaville C.U.P.MEP
KAISER Vallejo MEP
KAISER Vallejo C.U.P. MEP
Laguna Honda Hospital MEP
Lucille Packard Childrenâs Hosp. MEP
Marshall Hospital MEP
Mercy Folsom ER Expansion MEP
Mills Peninsula Hospital MEP
Mills Peninsula C.U.P. MEP
New Sequoia MRI & Cath. Lab MEP
St. Francis Hospital MEP
SUTTER Amador MP
SUTTER General MEP
SUTTER Radiology & Oncology MEP
SUTTER Roseville E
VA Medical Center MEP
Vaca Valley Medical Center EP
Valley Medical Center MP
Valley Specialties MC ME
Washington Hospital MEP
Washoe Medical CenterMEP
10. 10
Hospital Projects
SCRIPPS MERCY EP
SCRIPPS GREEN MEP
SCRIPPS LA JOLLA MEP
SCRIPPS ENCINITAS M
KAISER HARBOR CITY MEP
KAISER DOWNEY TOWER E
KAISER SUNSET LAMC MEP
KAISER WEST LA MEP
KAISER WOODLAND HILLS E
LAC/USC, D & T BUILDING E
LAC/USC, INPATIENT E
LAC/USC, OUTPATIENTE
LAC/USC, CENTRAL PLANT E
HOAG MEP
MERCY SOUTHWEST MP
WHITTIER PRESBYTERIAN E
SHARP CHULA VISTA M
SHARP MEMORIAL E
POMONA MEP
UCSD HILLCREST MEP
PALOMAR MEP
POMERADO MEP
BEVERLY MP
UCLA, SANTA MONICA ORTHO MP
UCLA, HARBOR CITY MEP
HUNTINGTON MEMORIAL MEP
ST. JOSEPHS MEP
ST. JUDE TOWER MEP
ST. JUDE (NPC) MEP
ST. JOHNS TOWER EP
ST. JOHNS INPATIENT E
MISSION MC MEP
CHILDRENS, LA TOWER ME
LOMA LINDA, A&C MEP
UCI MC MEP
CHILDRENS, OC MEP
CHILDRENS, SD MEP
INLAND VALLEY MC MEP
VA HOSPITAL, WEST LA MEP
MLK MEP
REDLANDS COMMUNITY MEP
Southern California
11. 11
OSHPD Pre-Approved
Library
â˘2007 CBC Manual currently under
OSHPD review
â˘2001 CBC
â˘What to do next
â˘Identify action items2007 CBC Design Manual under
OSHPD review â 2 Volumes
featuring over 1,400 pages
New details can be incorporated
into project documents
2001 CBC Design Manual has
404 pages
Online library of CAD files
www.isatsb.com
13. 13
In-House Engineering
17 degreed engineers in
Fremont
7 California Licensed PEâs,
10 EITâs
ISAT Structural Engineers
are involved with the
Hospital Building Safety
Board and their sub-
committees
Familiar with the ASCE 7-
05, ACI 318, 2007 CBC,
2004 NEC & 2002 NFPA
RISA, MathCAD, REVIT
Software
15. 15
Equipment Anchorage
Capability
Floor Mount, Wall Mount,
and Suspended Equipment
Anchorage Details
Vibration Isolation Design
Equipment Pad and Wall
Stud Calculations
Advise on âSpecial
Seismic Certificationâ for
MEP equipment
16. 16
Misc. Structural
Engineering
Roof Top Pipe and Duct
Supports (for wind and
seismic loading)
Pipe and Duct Vertical
Shaft Risers
Wall to Wall Common
Corridor Supports
Pipe Anchor and Guide
Sizing
Steel Moment Frames
MEPS Point Loading
Drawings
Acoustical Ceiling Designs
17. 17
COLD FORM STEEL
DESIGN CAPABILITY
Over 10+ years
experience in design of
Cold Form Steel Structures
Design of exterior and
interior wall systems
Capable of providing
recommendations and
design for attachments of
seismic supports to Cold
Form Steel Structures
18. 18
Grey-area issues:
Set screw couplings â Non-ductile?
Supports/bracing off different structural elements
Flexible connection requirements at all un-braced utility
connections
Inherent flexibility of small conduits?
Braced utilities: Install flex after drop or support all the way
to connection
Flex at conduit connection to top of switchgear lineups
Code bracing requirements for pull boxes & light fixtures (pull
boxes vs. gutters?)
Electrical equipment with raised channels (z clips) &
manufacturer end angles (interior and exterior clips)
12â rule and swivel hangers
Biaxial bending at longitudinal seismic locations
20. 20
Seismic Restraint Code Requirements
2007 CBC, Sec. 1613A (OSHPD)
âEarthquake Loadsâ
Based On ASCE 7-05
2006 CBC
21. 21
Niigata Earthquake â October 23, 2004
Sanyo Electric Niigata Semiconductor Fab Plant
⢠Plant damage - $ 177 million USD
⢠Lost inventory - $ 44 million
⢠Restoration - $ 260 million
⢠Business interruption - $ 356 million
Total Losses - $ 837 million
Financial Impact of Earthquake Damage to Non-
Structural ComponentsâŚ
âCode Basedâ vs. âPerformance Basedâ Design
â˘Building Codes for commercial construction are minimums designed to
provide Life Safety NOT Business Continuity.
â˘High Value/High Risk (i.e. âBusiness Criticalâ) facilities should be
designed for Continued Operation following an earthquake.
22. 22
Important Code Terminology
COMPONENT: A PART OR ELEMENT OF AN ARCHITECTURAL, ELECTRICAL,
MECHANICAL OR STRUCTURAL SYSTEM.
SEISMIC DESIGN CATEGORY: A CLASSIFICATION ASSIGNED TO A STRUCTURE
BASED ON ITS OCCUPANCY CATEGORY AND THE SEVERITY OF THE DESIGN
EARTHQUAKE GROUND MOTION. (RANGE = A THRU F)
SDS: 5% DAMPED DESIGN SPECTRAL RESPONSE ACCELERATION AT SHORT
PERIODS.
DESIGNATED SEISMIC SYSTEM: THE SEISMIC FORCE RESISTING SYSTEM AND
THOSE ARCHITECTURAL, ELECTRICAL AND MECHANICAL SYSTEMS OR THEIR
COMPONENTS THAT REQUIRE DESIGN IN ACCORDANCE WITH CHAPTER 13 AND FOR
WHICH THE COMPONENT IMPORTANCE FACTOR, Ip, IS GREATER THAN ONE.
OCCUPANCY CATEGORY: A CATEGORY USED TO DETERMINE STRUCTURAL
REQUIREMENTS BASED ON OCCUPANCY. (RANGE = I, II, III, or IV)
HAZARDOUS CONTENTS: A MATERIAL THAT IS HIGHLY TOXIC OR POTENTIALLY
EXPLOSIVE AND IN SUFFICIENT QUANTITY TO POSE A SIGNIFICANT LIFE-SAFETY
THREAT TO THE GENERAL PUBLIC IF AN ANUCONTROLLED RELEASE WERE TO
OCCUR. {FURTHER CLARIFICATIONS CAN BE FOUND IN CHAPTER 4 OF THE IBC}
2006 IBC
23. 23
Other Important TerminologyâŚ
SEISMIC ACCELERATION
(ALSO KNOWN AS âGâ FORCE):
THE FORCE THAT WILL ACT ON A COMPONENT DURING A
SEISMIC EVENT. EXPRESSED IN TERMS OF % OF THE
COMPONENTS WEIGHT. FORCE LEVELS ARE
DETERMINED BY BUILDING CODE FORMULA.
(EXAMPLE: EQUIPMENT WEIGHS 10,000 LBS @ 0.5gâs,
THE EQUIPMENT MUST BE BRACED/ANCHORED TO
RESIST A 5,000 LB FORCE ACTING IN ANY DIRECTION.)
25. 25
Areas of the contiguous US affected by the IBC that now
require seismic bracingâŚ
Projects outside the areas shown may also require seismic bracing if the project has a âperformanceâ
based seismic bracing specification in lieu of a âcodeâ based specificationâŚ
26. 26
The design of the seismic bracing and
gravity supports is now required to be
engineered and part of the construction
documentsâŚ
28. 28
G-Forces Vary Based Upon Elevation of the Component
(Relative to the Roof) within the Structure
*Accelerations shown are exaggerated for sample purposes.
32. 32
In the IBCâŚ
Seismic Forces are Utility Specific
In the IBC seismic forces vary based upon:
⢠The elevation of the utility in the structure.
⢠Vibration Isolated vs. Non-Vibration Isolated
⢠Importance factor (Ip) now depends upon the type of
service (i.e. Life Safety, Hazardous Material, etc.)
⢠The CONSTRUCTION of the utility plays a much larger
role (Welded Pipe vs. Threaded Pipe vs. Cast Iron)
⢠Size Exclusions are now based upon Seismic Design
Categories
2006 IBC
34. 34
HVAC Duct Exclusions (CA)
For Seismic Design Categories A or B:
⢠All components are exempt.
For Seismic Design Category C:
⢠Ip=1.0: All components are exempt.
⢠Ip>1.0:
Brace all square duct > 6 sq. ft. Brace all round duct > 33â diameter.
(CA Only)
Brace/Evaluate all equipment.
For Categories D, E, & F:
⢠Ip=1.0:
Brace all square duct > 6 sq. ft. Brace all round duct > 33â diameter.
No bracing is required on equipment <20 lbs that are connected via
flexible connections between associated duct, piping, etcâŚ
⢠Ip>1.0:
Brace all square duct > 6 sq. ft. Brace all round duct > 33â diameter.
(CA Only)
Brace/Evaluate all equipment.
35. 35
Piping Exclusions (CA)
For Seismic Design Categories A or B:
⢠No Bracing is required.
For Seismic Design Category C:
⢠Ip=1.0:
No Bracing is required.
⢠Ip>1.0:
Brace all pipe > 2â.
Brace all trapezes 10 lbs/lf or greater.
For Categories D, E, & F:
⢠Ip=1.0:
Brace all pipe > 3â .
Brace all trapezes 10 lbs/lf or greater.
Bracing may be excluded from components weighing <20 lbs that are
connected via flexible connection between components and associated
duct, piping, etc.
⢠Ip>1.0:
Brace all pipe > 1â.
Brace all trapezes 10 lbs/lf or greater.
36. 36
Electrical Exclusions
For Seismic Design Categories A or B:
⢠No Bracing is required.
For Seismic Design Category C:
⢠Ip=1.0:
No Bracing is required.
⢠Ip>1.0:
Brace all conduit > 2-1/2â.
Brace all trapezes 10 lbs/lf or greater.
For Categories D, E, & F:
⢠Ip=1.0:
Brace all conduit > 2-1/2â.
Brace all trapezes 10 lbs/lf or greater.
Bracing may be excluded from components weighing <20 lbs that are
connected via flexible connection between components and associated
duct, piping, etc.
⢠Ip>1.0:
Brace all conduit > 2-1/2â.
Brace all trapezes 10 lbs/lf or greater.
37. 37
Global Exclusions
(regardless of trade)
For All Design Categories:
Utilities 12â from structure do not require bracing so long
as they do not develop moments and cannot impact other
utilities or the structure.
Where Duct Ip>1.0, 12â Rule does not apply!!!
In Seismic Design Category D, Where Ip=1.0, Floor
Mounted equipment <400 lbs does not require seismic
anchorage calculations as long as flexible utility
connections are provided.
In Seismic Design Category D, Where Ip=1.0, Floor
Mounted equipment with legs >4â tall, regardless of weight,
require seismic calculations for both the anchorage and leg
(frame) design.
38. 38
The IBC Contains Substantial Changes to
Anchorage RequirementsâŚ
Under the IBC, for Systems Subject to Seismic RequirementsâŚ
âExpansion anchors shall not be used for mechanical equipment with
motors rated over 10 horsepower (7.45 kW). Exception: Use of
undercut expansion anchors is permitted.â
Spring Isolated Equipment is exempt from this requirement.
The Use of Powder Actuated Fasteners is Very Limited (See Table
at End of Handout)âŚ
2006 IBC
39. 39
IBC Anchorage Requirements ContâdâŚ
Post Installed Expansion Anchors
Must be crack concrete tested and
certified by ICC
Requires Special Inspection
2 x (or more) expensive than âoldâ
anchors
Limited load capacity
Drop in anchors not allowed
Powers SD1/SD2, Hilti KB-TZ, Simpson
Strong-Bolt
40. 40
IBC Special Inspection Requirements
Statement of Special Inspections (1704.1.1) â Architect /
SEOR / MEP Designer - Permit Phase
Statement of Responsibility (1706.1) â Installing Contractor
â Prior to Construction
Special Inspection (1704) â Hired by Design Team Prior to
Construction
Component Certification (1708.5) â Equipment Manuf. &
Contractor â Prior to Const
Quality Control Labels (1707.9) â Contractor, Spec.
Inspector & Manuf. â Upon Installation
2006 IBC
42. 42
Special Inspections (Contâd)
Periodic Special Inspection is required on vibration isolation systems in
Categories C thru F where clearance is required to be <1/4â.
2006 IBC
50. 50
Is SMACNA Seismic still valid under the
IBC?
SMACNA Seismic is listed as reference standard in
the â00 and â03 IBC / ASCE.
SMACNA rules and exclusions do not comply with
those listed in the ASCE 7-02.
SMACNA anchorages do not comply with the
cracked concrete requirements of the IBC.
All Reference to SMACNA has been removed from
the 2006 IBC / ASCE 7-05.
2003/2006 IBC
51. 51
Roles and Responsibilities
Owner /Architect / SEOR / MEP Designers
(Where Acting as Owners Agents)
⢠Statement of Special Inspections (Permit Phase)
⢠Hire/Provide Inspectors (IORâs) to Complete Necessary
Special Inspections.
Structural EngineerâŚProvide all of the necessary
seismic criteria per code requirements.
⢠Document clearly locations of seismic separations on
the drawing (preferably a separate drawing), along
with designed displacements.
⢠Document clearly (preferably on a separate drawing)
anticipated drifts between floors.
2003/2006 IBC
52. 52
Roles and Responsibilities ContâdâŚ
MEP Designers
⢠Statement of Special Inspections
⢠Provide Clear Guidance for Individual MEP System
Importance Factors (Ip). (ISAT Can Assist in This
Process But Ultimately the System Designer is the
Authority on the System)
2003/2006 IBC
54. 54
A Final Code Related NoteâŚ
The IBC requires that the SYSTEM (i.e. HWS, HWR, etc.) be
seismically sound. We tend to think within the box of
Seismic Bracing for the HORIZONTAL SUSPENDED utilities.
In order to fully meet the requirements of the code much
more than bracing is requiredâŚ
⢠Anchor Calcs for equipment.
⢠Riser Supports (both in shafts and at equipment)
⢠Thermal Pipe Stress Analysis
⢠Flex Joints at Equipment or Transitions
⢠Flex Joints at Building Seismic Joints
⢠Vertical Support and Trapeze Engineering
⢠Equipment Certification
⢠Special Inspection Tags
⢠CONTROL OF Vibration Isolation
⢠Seismic Bracing and Vertical Support of Floor Supported
Distributed Utilities (i.e. roof mounted duct)
⢠Inspection
58. 58
ISATâs involvement can begin during
design phase, during construction, or
after the utilities have been installed.
59. 59
Step 1: Working with the customer, ISATâs
Technicianâs gather jobsite criteria and
utility plans.
60. 60
Step 2: ISATâs Engineering Group calculates
the seismic accelerations for the projectâŚ
61. 61
Step 3: Consultation & Customer Preferences
ISAT consults with the customer to discuss:
⢠Project specific seismic bracing requirements
⢠Project specific seismic impact and constructability
issues
⢠Contractor Installation preferences
⢠Construction sequencing to reduce installation labor
⢠Ways to eliminate bracing when possible
62. 62
Step 4: Quote Development
Based On the Customer Preferences
and Using the Seismic Criteria for the
Project, ISATâs Engineers and Detailers
Value Engineer the Project to
Determine Minimum Quantities of
Material and Engineering Necessary.
A Quote For Material And Services Is
Then CreatedâŚ
63. 63
Step 5: Design Coordination
ISAT assigns a design team to all major projects consisting
of a Project Manager and Project Engineer. Each ISAT
Project team then controls all aspects of the ISAT Process
from modeling coordination, custom engineering, flex joint
and vibration isolation design, material shipments, and
inspection.
Project Manager
Project
Engineer
Addâl
Modelers
Addâl Engineering
Staff Available
69. 69
Vertical Support Engineering and
Integration
Vertical Support
Construction Documents
Vertical Support Design
Tables with Anchorage
Options
Model Integration
73. 73
ISATâs âBlue Banger Hangerâ
Cast-In-Place Concrete Deck Inserts
â˘Internal multi-thread design, one insert accepts multiple rod sizes
â˘Style âPIPâ for form pour slabs
â˘Style âSDIâ for metal decks with structural concrete
â˘Vertical support and/or seismic restraint anchorage
â˘For single hung and trapezed elements
â˘Can be inserted virtually anywhere on a metal deck, including
through the side of the flute! (No more having to keep track of
where the flutes are during layout planning!)
â˘No Special Inspection Required!
74. 74
ISATâs BIM Services Can Go Well Beyond The
Seismic Design Portion Of The ProjectâŚ
Drawing Changes
Report
⢠Document registry for all project
drawing sets;
⢠Color-coded directory of changes;
⢠Clouded and annotated changes;
⢠Project team reporting.
3D MEP Trade Model
⢠MEP modeling typically delivered in
3-6 weeks depending on project size;
⢠Architectural and structural models
MUST be accurate for proper
constructability analysis;
⢠Model delivered in Revit MEP, Vico
Constructor, CAD-Duct, ArchiCAD, or
NavisWorks
3D BIM Model
⢠Full construction-level detail 3D model;
⢠Complete and accurate constructability
analysis and report;
⢠Prioritized constructability issues;
⢠Locations of issues in both 3D and 2D;
⢠Constructability issues are linked to
constructability report to read details;
⢠Project binder that includes renderings,
content plan, constructability report.
Coordination Resolution
⢠Full construction-level detail 3D model;
⢠Complete and accurate constructability
analysis and report;
⢠Prioritized constructability issues;
⢠Locations of issues in both 3D and 2D;
⢠Project binder that includes renderings,
content plan.
⢠--PLUSâ
⢠Constructability report with coordination
resolution report included;
⢠NavisWorks model to share with project
team.
75. 75
Step 7: A Complete âSBâ (Seismic Bracing Drawing
Set Is Created For Inclusion In The Project
Documents
76. 76
Document Set Includes Trade Specific Seismic
Bracing LayoutsâŚ
Each Seismic Location is Detailed on the Plans and
Denoted with a Location Specific I.D. Number
A Seismic Bracing Legend is Added
to Assist Installers, Inspectors, and
Reviewing Engineers in
Understanding the Constraints of
the Design
ISATâs Structural Engineers âWetâ Stamp Each
Layout with Their Stamp from the Project State
77. 77
Example: Cable Bracing Kit
Kits Labeled with:
-Contractor Name
-Project Name
-Drawing #
-Building
Area/Floor
Cables are Pre-Tied
to custom lengths,
field adjustable,
with correct
brackets installed.
(No need to field
cut and swage
cables, no
âhuntingâ for
correct materials)
Correct concrete anchors, beam clamps, wood
connections, etc. are included in each kit. (No quote
surprises, No âhuntingâ for Anchors)
Appropriate quantity of Rod Stiffener components are included in
each kit. (No surprises in the quote (stiffeners are usually an add
with other systems), No âhuntingâ for materials)
Installation Details
are in each kit
Step 8: Kit Production and Material
ShipmentâŚ
78. 78
Example: Rigid Bracing Kit
Brackets are Pre-
Staked with
appropriate Bolts,
Washers, and Strut
Nuts.
(No âhuntingâ for
the right
components)
Details are utility
and seismic
location specific.
(No need for the
installer or reviewer
to carry a roll or
book of details
around)
*Brace arm strut is cut to length in the field.
79. 79
Installing ISAT Seismic BracingâŚ
ISATâs âRCHWâ Style Rod Capture BracketâŚ
All of ISATâs seismic bracing hardware is
retrofitable, no disassembly of the utility is
required.
80. 80
Buy American Act
ISATâs Seismic Bracing Kits and Blue Banger
Hangers, labeled as such, are a âDomestic
Construction Materialâ under FAR 52.225-9 and FAR
52.225-2
81. 81
Advantages of ISATâs Factory Assembled
Custom Seismic Bracing KitsâŚ
⢠Complete installation details
⢠All the correct parts
⢠Lowers installation costs
⢠Speeds up installation
⢠Aids in the inspection process
⢠Eliminates costly rework
⢠Allows the use of lowest cost
labor.
84. 84
Step 9: Field CoordinationâŚIn Addition to the General Notes,
the Seismic Bracing Legend Contains All the Necessary
Information for Review, Installation, & Inspection
Each location ID number is
shown on the bracing legend
and provides easy reference
to all pertinent details and
engineering for that location.
85. 85
Step 10: Field Review & Quality Assurance
Support
An ISAT Representative will conduct a Field Review of the
installation prior to inspection by the Inspector of Record to
head off any issues. ISAT also provides a review letter for
interested parties.
86. 86
ISAT supplies optional
field installable quality
assurance tags
identifying the name of
the installing contractor,
the seismic restraint kit
callout used at each
location and other
pertinent seismic
information.
Quality Control Labeling and Field Review
âField Installedâ Seismic Restraint ID Tags
87. 87
Site Survey Services for Non-Structural Seismic
Upgrades
LIDAR Scan
Point Cloud
CAD Model
88. 88
OSHPD LESSONS LEARNED
Pre-con phase is the most crucial (GIGO!):
-Coordinate seismic bracing in complete 3D model
-Establish point load impacts
-Install high percentage of inserts & work thru halo conflicts
-Identify custom supports/bracing early on
-Submit RFIâs to clarify project specific interpretations of grey areas (see
next sheet)
During Construction phase:
-Engage IOR/OSHPD early and often : Generate trust
-Keep an eye on the GC & Architect with regards to Post-approval designs
that have been submitted (DONâT LET THEM SIT ON THEM!)
-OSHPD regional crews move slowly and are easily overwhelmed. Keep It
Simple and Think within the Box (approved documents/OPAâs)
-Documentation Documentation Documentation
89. 89
Grey-area issues:
â˘Set screw couplings â Non-ductile?
â˘Supports/bracing off different structural elements
â˘Flexible connection requirements at all un-braced utility
connections
â˘Inherent flexibility of small conduits?
â˘Braced utilities: Install flex after drop or support all the
way to connection
â˘Flex at conduit connection to top of switchgear lineups
â˘Code bracing requirements for pull boxes & light
fixtures (pull boxes vs. gutters?)
â˘Electrical equipment with raised channels (z clips) &
manufacturer end angles (interior and exterior clips)
â˘12â rule and swivel hangers
â˘Biaxial bending at longitudinal seismic locations
Contact your local ISAT rep to develop a project
specific approach to each grey-area item
92. 92
ISAT can also provide Custom Engineering for
âotherâ non-structural componentsâŚ
(Custom Engineered Wall Mounted Electrical Panel Support System)
100. 100
How Seismic Bracing Can Negatively Impact Your
ProjectâŚ
Lack of Technical Support
⢠Coordination Issues will ALWAYS exist, we assign a field engineer to
EVERY project.
Lack of pre-engineered details
⢠Adds cost for âcustomâ engineering
⢠Adds delaysâŚtime to create custom details and engineering.
Inadequate or Inappropriate Submittals
⢠Every Submittal ISAT produces is prepared by an engineer and is
specific to the project (No Generic Submittals!)
Incorrect Installation
⢠ISAT conducts âInstaller Trainingâ on all projects to avoid installation
issues.
⢠Pre-Inspection Job Walks to address issues before inspection.
Lack of Engineers Stamp
⢠Every submittal we provide is âWet Stampedâ by a Structural Engineer
licensed in the state of the project.
Complicated Installation Details or Engineering
Difficult to Inspect
⢠All Information Necessary for Inspection is provided on EVERY project.
101. 101
SDS
(Design Spectral Response Acceleration at
Short Period)
SMS
(Maximum Considered Earthquake Spectral
Response Acceleration for Short Periods)
Fa & Ss
(Acceleration Based Site Coefficient & Spectral
Response Acceleration At Short Period)
Site Class & Ss
(Fa can be derived from Ss & Site Class)
In Order to Derive SDSâŚ
109. 109
Seismic Retrofit
and the Challenge to Facility Owners
Facility needs to remain fully operational.
Lack of accurate drawings of existing
conditions
Inaccurate drawings can cause difficulties in
traversing permit approval process.
Hyper-Inflation of construction costs due to
too many unknowns for the bidding
contractors
110. 110
THE ISAT SOLUTION
(ISATâs Survey Group)
Initial Site
Consultation
ISAT Site
Survey
Creation of
As-Built
Drawings
Seismic
Bracing
Layout
ISAT Kits
Key ISAT Advantages:
Complete Survey of Designated
Systems
Technical Support Throughout
Project
QA Tags: Building In Value During
The Construction Process
Streamlined, Cost-Effective Means
of Achieving Code Compliance.
111. 111
Step #1: Initial Site & Client
Consultation
Consult with ownerâs representative to establish
project goals.
Discuss critical building systems and hazardous
utilities.
Acquire available drawings and site structural
info.
Walk facility to discuss general site layout, above
ceiling access, and operational concerns.
Project specific seismic impact and
constructability issues
Project Installation Conditions
112. 112
Step #2: ISAT Site Survey
ISAT Survey Team to begin work as directed by Owner.
Survey Team available during facility âdown hoursâ.
Field conditions reviewed to identify congestion issues and bracing
solutions.
Create or update as-built drawings of MEP utilities.
When we do the creation of as built drawings through a survey, we
also engineer and place the seismic on those drawings field
verifying so it can actually be installed at that locationâŚ.All in one
step. The contractors now have the exact conditions to bid and will
not have any grey area that typically forces them to increases their
bid. The industry standard approach is for the Architect or MEP
Engineers to create the as-built drawings, then they write specs so
the bidding contractors have it in their scope to do the seismic.
We cut out one whole step and streamline the contractors bid
while providing the most effective means of passing through the
inspection/local approval gauntlet.
By utilizing ISAT we will streamline the cost and mitigate time and
installation cost risk.
113. 113
Step#3: Creation and Approval of Seismic
Bracing Layouts
As-built drawings created
in AutoCAD.
Field survey information
utilized to engineer specific
code compliant solutions.
ISAT Seismic Bracing layout
incorporated into project
drawings and wet- stamped
by Structural Engineer .
ISAT Technical Support
interfaces with project
inspection staff to facilitate
approval.
114. 114
Step #4: Material Quote Development
Utilizing the Seismic Bracing Layouts
created during the survey, an ISAT
technician creates a material quote for
contractors to utilize during the bid
process.
116. 116
Applicability of OPA to 2007 CBC
Recent feedback from OSHPD is that they will be
enforcing the 2007 CBC sooner rather than later.
117. 117
Donât get creative, stick to the OPAâs. The biggest delays
to OSHPD projects are due to Post Approval issues!!!
OPA â OSHPD Pre-approved system:
ISAT OPA-0485 (Current expiration dates are not being enforced ).
SEOR & MEOR approve seismic layouts and IORâs inspect. OSHPD
DSE reviews to determine accuracy of TDLF (g-force calculation)
only .
30 Day Review Period for Post Approvals
Post Approval â Non-OPA supports:
Deferred Approval â Permit drawings defer items to later date
Change Orders â Changes to permit drawings
Information Bulletin (IB) & Addendum
Custom engineering and detailing with PE stamp submitted and
approved by AOR,SEOR,MEOR then AOR fills out PAD form
AOR engages OSHPD field crew. DSE either signs PAD and stamps
OSHPD approval on detail, or defers to Office Review. Office 30 day
turnaround each round of submittal/resubmittal.
OPA vs Post Approval
118. 118
OSHPD LESSONS LEARNED
Lack of consistency from project to project and different opinions
from each field official. Submit RFIâs early to clarify
requirements.
Examples of currently impacting issues that are inconsistently
enforced:
Set screw couplings â Non-ductile reduce seismic spacing by ½
Flexible connection from overhead utilities to wall mounted or to floor
mounted equipment
Detailing and engineering of vertical hangers (non-seismic)
âGrey-areaâ code bracing requirements â pull boxes & VAVâs?
No-hub riser joint stabilizers & riser clamp anchorage at each floor
Make sure GC and AOR are engaging OSHPD to approve all Post-
approval designs upfront
OSHPD regional crews move slowly and are easily overwhelmed.
Design seismic bracing and all supports early, preferably as part of
100% DD plan set.
