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.
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
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
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