ChipB
Structural
- Apr 21, 2001
- 347
I'm analyzing an existing roof of a warehouse. I have a beam that is supporting two bar joists. There is NO kicker from the bar joist bracing the bottom flange against twist, however, it appears that they considered the bar joist as bracing in the weak direction. Is this standard? The axial load on the original design drawing is 147k. The beam used is a W21x44. Its span is 20'. Fy=36ksi. The bar joist spacing is 6'-8". What are you guys feelings on this? There is no way the tensile bending moment will zero out the compression force in the bottom flange.