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Steel Design
- 1. A 4-Storey Steel Office Building Presented to: Dr. Anjan Bhowmick Presented by: Benyame Bahiru, Jessica Carmosino, (Karis)Ho Yuen Cheung, Salvatore Lee Giulione, Robin Ramirez, Andrew Tam
- 2. Quebec City • Located in North-Eastern Quebec in the Saint- Lawrence River valley • 2 ½ hour drive from Montreal • Population: 765 000 • Average high temperature: 22°C to 25°C • Average low temperature: - 13°C to -18°C • Last major earthquake: 1663 Charlevoix earthquake with a moment magnitude of between 7.3 and 7.9
- 3. 4 Storey Office Building Design according to National Building Code of Canada (NBCC 2010) and the Canadian Standard for Design and Construction of Steel Building (CSA-S16-09). Plan Dimensions: Length = 55m, Width = 30m First Floor Height: 5.8m Typical Storey Height: 3.75m Total Elevation: 17.05m (low-rise) CBF’s on either side of building to resist lateral loads (wind & earthquake) 2 staircases: East & West side of building Designed the office building by determining the live, dead, snow, wind, and earthquake load that the structure must resist under specific conditions that vary in Quebec City. Also designed the CBF’s to satisfy safety standards. AutoCAD for the structural and architectural drawings. ETABS for analysis of the structure.
- 4. Assumptions Dead Load Calculation: 10% steel allowance Importance Factor, I: 1.0 (normal building) Open terrain environment CBF stiffness, K = 1 Building is situated on top of very dense soil and soft rocks -> Class C No storage load for each floor Considered the beams as laterally supported
- 5. Introduction Objective: A four story office building Location: Quebec City, Quebec Climatic Data: Table1: Climatic Data of Québec City (Appendix C – Climate Data) Province and Location Elev. (m) Design Temperature Degree - Days Below 18oC Snow Load, kPa 1/50 Hourly Wind Pressures, kPa Seismic Data January July 2.5% 2.5% oC 1% oC Dry oC Wet oC Ss Sr 1/50 Sa(0.2) Sa(0.5) Sa(1.0) Sa(2.0) PGA Québec 120 -25 -28 28 22 5080 3.6 0.6 0.41 0.55 0.32 0.15 0.052 0.30
- 6. Load Calculations Ground Floor 2nd Storey 3rd Storey 4th Storey Roof Dead Load, kPa 4.51 4.51 4.51 4.51 1.045 Live Load, kPa 4.80 2.40 2.40 2.40 1.00 Snow Load, kPa - - - - 3.48 Wind Load E-W direction, kN - 47.30 37.18 37.18 18.89 Wind Load N-S direction, kN - 84.72 66.54 66.54 33.29 Earthquake Load E-W, kN - 222.91 367.03 511.15 151.83 Earthquake Load N-S, kN - 231.05 380.44 529.83 157.38 Table2: Load Calculations
- 11. Selected Sections for Beams: Hand Calculations Floor Ground 2nd Story 3rd Story Roof Floor Beam W310x33 W310x28 W310x28 W310x33 Main Beam W530x74 W460x68 W460x68 W460x68 Edge Beam W410x54 W360x39 W360x39 W410x46 Table3: Selected Sections
- 12. Selected Sections for Columns: Hand Calculations Columns Section Interior W310x118 Edge Horizontal W310x86 Edge Vertical W360x74 Corner W360x74 Table4: Selected Sections
- 13. Elevation with Final Beam and Column Sections (ETABS)
- 16. Deflected Shape
- 18. Mode Shape
- 19. Architectural – Ground Floor Plan Layout - 1 Security Desk - 1 Coffee Shop - 2 Staircases - 2 Entrances - 2 Washrooms
- 20. Architectural – Typical Floor Plan Layout - 1 Electrical Room - 1 Store Room - 2 Lunch Rooms - 2 Washrooms - 2 Conference Rooms - 2 Reception Areas - 2 Staircases - 2 General Manager Office Rooms - 10 Office Rooms - 128 Cubical Offices
- 24. Cost EstimationProject: 4 Story Office Building Type of Work: Owner: Contactor: Period Ending: Item Unit Estimated Quantity Unit Price Amount Total W section Beam/Columns lb 504,890.32 $ 1.50 $ 757,335.48 Total HSS Section ft 263.82 $ 4.50 $ 1,187.19 Deliver Steel Members lump sum 1 $ 25,000.00 $ 25,000.00 Erection of Steel Members lump sum 1 $ 20,000.00 $ 20,000.00 Steel Deck square foot 71041.8 $ 6.50 $ 461,771.70 Slab Concrete cubic meter 471.9 $ 1,050.00 $ 495,495.00 Floor Finish square foot 71041.8 $ 8.03 $ 570,465.65 Wall (Brick) square foot 2936.39 $ 16.25 $ 47,716.34 Dry Wall Partition square foot 14734.39 $ 3.49 $ 51,423.02 Exterior Glass square meter 2625.7 $ 41.65 $ 109,360.41 Gravel cubic yard 0.566 $ 29.50 $ 16.70 HVAC System lump sum 1 $ 41,675.00 $ 41,675.00 Total $ 2,581,446.48Table3: Cost Estimation
Editor's Notes
- In order to design the cbf on etabs, We took the tension compression option with the parameter of Rd Ro we assigned seimtic data on etbas
- In the center of the floor, there is a security desk. In the north end, there are the washrooms. The staircases are located on the east and west center and it applies for all floors. There is a coffee shop located in the bottom left corner.
- This is the floor plan for storey 2 and above, In the center of the floor, there are 128 cubical offices, 2 general manager office rooms and 10 office rooms along the south wall. Along the North wall, 2 washrooms, 2 lunch rooms, 2 conference rooms, an electrical room and a store room. 2 reception areas are located next to the staircases.