A simple span of 4x Douglas Fir-Larch (DF-L) No. 1 supports uniformly distributed dead and live...

 

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A simple span of 4x Douglas Fir-Larch (DF-L) No. 1 supports uniformly distributed dead and live load (from occupancy) on its narrow edge (Cu-1.0). Assume dry service and normal temperature conditions apply, the member is not incised, and that it does not meet the requirements for a repetitive member (C, 1.0). Sufficient lateral bracing is provided for beam stability (CL=1.0). wp 180 lb/ft, w=300 lb/ft 10 ft 4x?? 1. Use ASD to select the beam size that will support the given loads. Assume the size factor is C-1.3, then adjust the beam size if the available strength is too low or overly conservative. 2. Show that your beam has sufficient shear strength. 3. What is the required bearing length, l, at each support that will prevent bearing failure? A simple span of 4x Douglas Fir-Larch (DF-L) No. 1 supports uniformly distributed dead and live load (from occupancy) on its narrow edge (Cu-1.0). Assume dry service and normal temperature conditions apply, the member is not incised, and that it does not meet the requirements for a repetitive member (C, 1.0). Sufficient lateral bracing is provided for beam stability (CL=1.0). wp 180 lb/ft, w=300 lb/ft 10 ft 4x?? 1. Use ASD to select the beam size that will support the given loads. Assume the size factor is C-1.3, then adjust the beam size if the available strength is too low or overly conservative. 2. Show that your beam has sufficient shear strength. 3. What is the required bearing length, l, at each support that will prevent bearing failure?