horizontal diaphragm
horizontal diaphragm
(OP)
I am designing a 2-story building (30’x60’x16’(h)) with big windows at all sides. Building has to stand for a heavy wind load and there is no any shear wall can be constructed for the layout. I therefore chose the following system:
Framing: made of steel beam and post
Roof and floor: made of timber joists and plywood panel
My questions are:
If I consider roof and floor as a horizontal diaphragm to minimized steel member sizes, what should I do at the connection between steel beam and timber joist to ensure timber and steel work together? Can I find this kind of detail on any web site?
Please help!
( Thanks for MeggieM DaveAtkins UcfSE and MeggieM’s advice for my previous question. I talked Simpson’s engineer, they don’t recommend that using timber joist with Simpson connection as lateral supports.)
Framing: made of steel beam and post
Roof and floor: made of timber joists and plywood panel
My questions are:
If I consider roof and floor as a horizontal diaphragm to minimized steel member sizes, what should I do at the connection between steel beam and timber joist to ensure timber and steel work together? Can I find this kind of detail on any web site?
Please help!
( Thanks for MeggieM DaveAtkins UcfSE and MeggieM’s advice for my previous question. I talked Simpson’s engineer, they don’t recommend that using timber joist with Simpson connection as lateral supports.)






RE: horizontal diaphragm
RE: horizontal diaphragm
DaveAtkins
RE: horizontal diaphragm
To Taro,
In order to make the horizontal diaphragms and steel beams work together, Do timber joists also need to be somehow attached to steel beams? only nailing plywood panel to nailer is good enough?
To DaveAtkins
Yes, I use all moment connection for all beams and columns. However, if the beams can be horizontally supported by the diaphragms, they will be smaller because the horizontal moment and deflection will be partially handled by the diaphragms. Am I right?
RE: horizontal diaphragm
DaveAtkins
RE: horizontal diaphragm
What columns did you have in mind? A quick and dirty hand calc on a napkin without my steel manual or software came up with a W12x58 minimum. I'd recommend consulting a registered P.E.