Masonry Bracing Top Flange of Steel
Masonry Bracing Top Flange of Steel
(OP)
Does anybody know if masonry braces the top flange of steel to prevent LTB. Are there any special details that have to be made for this to be done? I have the cmu sitting on the top flange of the steel section and I'm trying to limit the size.
Thanks
Thanks






RE: Masonry Bracing Top Flange of Steel
RE: Masonry Bracing Top Flange of Steel
If the course sitting directly on the beam is a bond beam, and that bond beam can support 2% (rule of thumb, comes from Salmon and Johnson, Design of Steel Structures), of the COMPRESSIVE load in the beam's flange, in addition to its other lateral loading (wind/seismic), then yes, it is laterally supporting the beam.
For simplicity, the compressive load in the flange is the maximum moment (in kip-inches) in the beam (M) divided by the depth of the beam (D) minus the thickness of the beam's flange (tf).
F = M/(D-tf)
If you're supporting masonry, you have to limit your deflection to L/600
RE: Masonry Bracing Top Flange of Steel
RE: Masonry Bracing Top Flange of Steel
RE: Masonry Bracing Top Flange of Steel
RE: Masonry Bracing Top Flange of Steel