Steel Joist Side Slope in Commercial Building
Steel Joist Side Slope in Commercial Building
(OP)
Does anyone orient their steel joists perpendicular to the roof slope so that the joist has a side slope? I have a commercial building with a 1% slope. I would like to run the steel joists perpendicular to the slope so they can bear on the frame and I won't need additional framing (as I would if the joists ran parallel to the slope). I talked to someone at Vulcraft and they said they would not do any special design for this case. I also found an old question and answer article from Modern Steel Construction that talks about the issue. Does anyone have some experience in this application? Thanks.






RE: Steel Joist Side Slope in Commercial Building
If Vulcraft likes it - then OK
RE: Steel Joist Side Slope in Commercial Building
I would generally recommend a 1/4" per foot slope. Less requires a ponding analysis.
RE: Steel Joist Side Slope in Commercial Building
Show the Joist vertically with a bent plate across the top, so that there was no point bearing on the decking.
Show the joist perpindicular to the deck, and require the joist to be designed for the biaxial bending that would ensue.
Either way, just make sure you cleary show what is required of the joist manufacturer. My recollection from the conversation I had with another supplier, was that for an 1/4" per foot slope, they may only require the bracing to be installed closer together.
RE: Steel Joist Side Slope in Commercial Building
RE: Steel Joist Side Slope in Commercial Building
RE: Steel Joist Side Slope in Commercial Building