Lateral bracing for beam
Lateral bracing for beam
(OP)
I have a situation where I'm designing a transfer beam in a concrete building. The columns are cast in place with brackets picking up precast T beams. The case is that one column near the center of teh building needs to be removed. I designed new TS columns near next to the existing columns that are to remain. The column between these two will bear on the transfer beam. I designed the beam as unbraced but my supervisor still wanted to me to provide a TS kicker from the top of the beam to the underside of the precast T beam. My question is: Since the beam was designed as unbraced, what lateral force should I design the brace for? It's going to be a parking garage so I was thinking of just designing it for the impact of a car in the case that someone drives in with a pickup truck that doesn't clear. Or I could just use a TS4x4x1/4 and call it a day, but I have no calc or justifcation.






RE: Lateral bracing for beam
BTW, I think it's a good idea to provide such a kicker too. FOr one thing, if I'm understanding your problem, the load bears on the top of the beam. Therefore, it'll have a destabilizing effect compared to the case of load applied near hte centroid.
RE: Lateral bracing for beam
RE: Lateral bracing for beam
RE: Lateral bracing for beam
2) As I indicated above, unless the beam is preloaded, deflection of the structure above could cause problems. Have you considered this?