A 4-Storey Steel Office BuildingP re s e n t e d t o : D r. A n j a n B h o w m i c k

P re s e n t e d b y : B e ny a m e B a h i r u , J e s s i c a C a r m o s i n o , ( Ka r i s ) H o Yu e n C h e u n g , S a l v a t o re L e e G i u l i o n e , Ro b i n R a m i re z , A n d re w Ta m

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

4 Storey Office BuildingDesign 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.

AssumptionsDead 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

IntroductionObjective: 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- DaysBelow 18oC

Snow Load,

kPa 1/50

HourlyWind

Pressures, kPa

Seismic Data

January July 2.5%

2.5% oC

1%oC

DryoC

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

Load CalculationsGround 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

Structural Plan

Structural Plan

Structural

Plan in

East and

West

Direction

Structural

Plan in

North and

South

Direction

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

Selected Sections for Columns: Hand Calculations

Columns Section

Interior W310x118

Edge Horizontal W310x86

Edge Vertical W360x74

Corner W360x74

Table4: Selected Sections

Elevation with Final Beam and Column Sections (ETABS)

EAST AND WEST CBF

NORTHAND SOUTH CBF

Deflected Shape

Deflected Shape 3D

Mode Shape

Architectural –Ground Floor Plan Layout

- 1 Security Desk- 1 Coffee Shop- 2 Staircases- 2 Entrances- 2 Washrooms

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

Architectural Elevation- North

Architectural Elevation- South

Architectural Elevation- West

Cost EstimationProject: 4 Story Office BuildingType 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 $ 2,581,446.48 Table3: Cost Estimation