Question

1. The floor framing plan is shown below. Design the beams B1, B2, and Ba Check the beam weight for each beam. The bay does not repeat. Note The dead load does not include the weight of the beam Select the most economical section for each design to be fully laterally braced. Use A36 steel where Beam B1 frames into it only. Use A992 Grade 50 steel is considered fully braced by the slab it supports. Use A992 Grade 50 a. Design-B1 for flexure and total load deflection 240 . Consider the beam b. Design-B2 for flexure and shear. Beam-B2 is braced at the ends and c. Design-B3 for flexure, shear and total load deflection L/240. The beam steel. Lt L2 L1 Use the following lengths, widths and loads (do not select all values from a single row) Dead Load Live Load 125 psf 135 psf 113 psf COTS) 10 ft) 16 ft 16 ft 55ps 5 ft 12 ft 13 ft 18 9 ft 17 ft 43 ps 47 psf 53 psf 14 ft 07

Answer 1

At first we will calculate the influence areas for the beams. The we have to calculate the imposed udl. Then we will design the steel beam according to the plastic modulus.

1) Total load-55 + lot C16 2ト 15 νο bat on beam% Load X influence area \b 2 X106, 25 - 141.5 Lo d) 2 4V2.5X15 84060 5134 000 PA 11-81 in

in?) IS) Inlienee area tort bearm 9r 32. 15 M) 1215 X151 are declared 12.53 ip ovide Secbion Wb X20 (12n3)

15 15-b) A15 15 ID 15+15-540 paura moment (H30 Mo SAo2 mo 0 Pravi de gection 2 W10X 22 Tp = 23.2303)