Sloped Intermediate Moment Frame
Sloped Intermediate Moment Frame
(OP)
I am working on the design of a one story building with a Seismic Category D and a 4:12 roof pitch. I am using Intermediate Steel Moment Frames, however, since there are no prequalified sloped Intermediate Moment Frames, my thought is to use a typical Intermediate Moment Frame (i.e. not sloped) and have a truss (maybe with HSS or wide flange) to transfer the shear force from the roof diaphragm to the moment frame. I realize that I still need to brace the top and bottom flanges per AISC 358-05 but, I would like to know if there's there in inherent problem with my proposed solution.
Any thoughts would be appreciated.
Any thoughts would be appreciated.






RE: Sloped Intermediate Moment Frame
Mike McCann
MMC Engineering
RE: Sloped Intermediate Moment Frame
I will definitely do so on the end bays, but I neglected to mention that these frames also occur inside the building where I have to use a truss to allow the passage of ducts, sprinkler pipes and such.
Thanks for the reply.
RE: Sloped Intermediate Moment Frame
Mike McCann
MMC Engineering
RE: Sloped Intermediate Moment Frame
RE: Sloped Intermediate Moment Frame
RE: Sloped Intermediate Moment Frame
RE: Sloped Intermediate Moment Frame
Mike McCann
MMC Engineering
RE: Sloped Intermediate Moment Frame
SidePlate is a moment connection that the manufacturer claims it saves time and money over other prequalified moment connections. What Gumpmaster was suggesting is that instead of having a typical IMF and adding a truss on top of it to transfer the shear from the diaphragm is having a sloped frame with the SidePlate connection since it is prequalified for use with an IMF and can be sloped. This would actually work out great since it would allow for the Cathedral ceiling that was originally intended. However, I have I contacted Sideplate to verify that it can actually be used in a sloped IMF and have not yet heard back from them.
If you would like to check it out, here's their website address: http://www.sideplate.com/
RE: Sloped Intermediate Moment Frame
I asked about large sloped roofs, and they said not a problem. The only tricky part (for them) is how thick the side plates need to be to prevent buckling at the connection. They run LS-Dyna in house, so they can figure it out no sweat.
RE: Sloped Intermediate Moment Frame