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solution1_2136 - DEPARTMENT OF CIVIL ENGINEERING LAKEHEAD...

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DEPARTMENT OF CIVIL ENGINEERING, LAKEHEAD UNIVERSITY Engineering 2136 – Steel Design Solutions for Assignment No.1, Fall 2006 Dr. Y Gong 1. See Part 4 of NBCC 2005. 2. Specify the live load for the following occupancies: (1) Classrooms 2.4 kPa (2) Theatres with fixed seats 2.4 kPa (3) Arenas 4.8 kPa (4) Exterior balconies 4.8 kPa (5) Museums 4.8 kPa (6) Retail area in a mix-used building 4.8 kPa (7) Garages for passenger cars 2.4 kPa (8) Stack rooms in a library 7.2 kPa (9) Office areas located in the first storey 4.8 kPa The above live loads are specified by Table 4.1.5.3 in National Building Code of Canada 2005. 3. Solution (1) Tributary area for Beam 3 = 3(9.5)=28.5 m 2 , the live load reduction factor = 886 . 0 5 . 28 8 . 9 3 . 0 = + Tributary area for Girder B= (3x3)(9.5)=85.5 m 2 , the live load reduction factor= 64 . 0 5 . 85 8 . 9 3 . 0 = + Tributary area for Column A of one story = (12)(9.5)= 114 m 2 , the live load reduction factor = 59 . 0 114 8 . 9 3 . 0 = + (2) The structural analysis model for Beam 3 under occupancy live load is q Span = 9.5 m where the specified live load q = (4.8)(0.886)(3) = 12.76 kN/m 1
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