This presentation summarizes the structural design of a proposed 21-story office building in Brooklyn, New York. It includes architectural drawings and details of the building design as well as the structural design of building elements like columns, beams, girders, foundation walls, and a bracing system. Construction cost estimates and a project schedule are also provided.

1. Proposal
Presentation
BROOKLYN, KINGS
2015 STRUCTURAL PROJECT
Carlos Santana
Marie Brumelot
John Morocho
Afaq Sulehria

2.  Project Overview
 Architectural Information and drawings
 Green Roof
 Structural Information
 Structural Design:
 Columns
 Beams
 Girders
 Base Plate
 Piers
 Footing
 Foundation Wall
 Brace System
 Cost Estimation
 Schedule
OVERVIEW

3. PROJECT OVERVIEW
 21-storey Building (304.5-ft high)
 2 stories set back
 2 underground parking levels
 Location: 8791 21st Avenue, Brooklyn, NY
 Footprint: 20,125 square feet
 Community areas & recreational areas
 Green Roof

4.  Building Model
PROJECT OVERVIEW

5.  Parking Model
PROJECT OVERVIEW

6.  Parking Model
PROJECT OVERVIEW

7.  Building Type: Office
 Building Category II (Low Hazard)
 Exterior Wall System: Kawneer 1600 system 2 Curtain Wall
2 1⁄2” x 7 1⁄2”
 SSG curtain wall
 Low to mid-rise applications
ARCHITECTURAL INFORMATION

8.  Parking Level 1
ARCHITECTURAL DRAWINGS

9.  Parking Level 2
ARCHITECTURAL DRAWINGS

10.  Lobby
ARCHITECTURAL DRAWINGS

11.  Typical Floors
ARCHITECTURAL DRAWINGS

12.  Setback
ARCHITECTURAL DRAWINGS

13.  Bulkhead
ARCHITECTURAL DRAWINGS

14.  Elevations
ARCHITECTURAL DRAWINGS

15.  Semi-intensive Green Roof
 Recreational environment
 Handicap accessibility
 Plants and Woodgrain tiles
 Benefits for the building
 Stormwater management:74.8% retention rate
 Durability: UV protection
GREEN ROOF

16. GREEN ROOF – CROSS SECTION

17.  Design Specification: ACI 318, ASCE 7-05, and AISC Steel
Construction Manual
 Building height: 304.5 feet ,Parapet height: 4 feet
 Loadings:
 Dead Load:
Typical Floor = 70 psf; Roof = 157 psf.
 Live Load: ASCE Standard 7-05
STRUCTURAL INFORMATION

18.  Balanced Snow Load = 45psf
Ground Snow Load = 20 psf
Height of balanced snow load = 2.06 ft
Drift Height = 2.92 ft
Drift Width = 9.94 ft
Maximum Intensity Drift Surcharge Load = 42.21 psf
Maximum Roof Snow Load = 87.21 psf
STRUCTURAL INFORMATION

19. STRUCTURAL INFORMATION

20. STRUCTURAL INFORMATION

21.  Interior Columns
STRUCTURAL DESIGN – INTERIOR
COLUMNS

22.  Interior Columns
STRUCTURAL DESIGN – INTERIOR
COLUMNS

23.  Interior Columns
STRUCTURAL DESIGN – INTERIOR
COLUMNS

24.  Interior Columns
STRUCTURAL DESIGN – INTERIOR
COLUMNS

25.  Foundation
We use the cantilever method.
W14x145
W14x159
STRUCTURAL DESIGN - MOMENT
FRAME COLUMNS

26.  Lobby to 18th floor
SIZE
STRUCTURAL DESIGN – MOMENT
FRAME COLUMNS

27.  Setback
W14x283
STRUCTURAL DESIGN - MOMENT
FRAME COLUMNS

28.  Typical Floor
Inner Core: W18x60 with
45 studs per beam
Outer Core: W18x55 with
32 studs per beam
Secondary beams 7.5’o/c:
- For L=37.5ft: W16x40
20 studs per beam, partial
composite with 1” Camber
- For L= 22.5ft: W16x26
13 studs per beam, partial
composite.
STRUCTURAL DESIGN - BEAMS

29.  Transfer Floor
We use W18x60 with 45
studs per beam and ¾”
camber both for inside
and outside the Core.
Secondary beams 7.5’o/c:
- For L=37.5ft: W18x60
45 studs per beam, partial
composite, 1” Camber.
- For L= 22.5ft: W18x46
44 studs per beam, partial
composite.
STRUCTURAL DESIGN - BEAMS

30.  Set Back Floor
Inner Core: W18x60
with 45 studs per
beam
Outer Core: W16x31
with 24 studs per
beam
STRUCTURAL DESIGN - BEAMS

31.  Bulkhead
W18x60 with 45 studs
per beam
STRUCTURAL DESIGN - BEAMS

32. 35-ft Long beams:
W30x124
22.5-ft Long beams:
W14x43
STRUCTURAL DESIGN –
MOMENT FRAME BEAMS

33. We use W33x130
Transfer Girders
STRUCTURAL DESIGN –
TRANSFER GIRDERS

34. We Assume that the area
of concrete is 1.5 times
bigger than the base plate.
STRUCTURAL DESIGN – BASE
PLATE

35.  Concrete Piers
We assume d=3”.
STRUCTURAL DESIGN - PIERS

36. STRUCTURAL DESIGN – FOOTINGS

37. STRUCTURAL DESIGN – FOUNDATION WALL
Thickness: 16”
Soil Pressure on total height: 905 psf
Maximum Pressure: 452.4 psf
Reinforcing: #7 bars with 12 in spacing
Secondary #6 bars with 12 in spacing

38. STRUCTURAL DESIGN – BRACE SYSTEM

39. STRUCTURAL DESIGN – BRACE SYSTEM

40. STRUCTURAL DESIGN – BRACE SYSTEM

41. STRUCTURAL DESIGN – BRACE SYSTEM

42. COST ESTIMATION

43. SCHEDULE