CMU Deflection Limits Extents
CMU Deflection Limits Extents
(OP)
Suppose I have a beam directly supporting CMU. Deflection limit = L/600. What about the girder that supports this beam? Not directly loaded with CMU, but still required to meet L/600? What if this girder frames in to another girder? Does this girder, now twice removed from direct CMU loading, need to meet L/600?






RE: CMU Deflection Limits Extents
RE: CMU Deflection Limits Extents
RE: CMU Deflection Limits Extents
I think you are right, it does need to be looked at, but to keep a girder to L/600 because it supports another girder (at L/600) that supports a beam (also restricted to L/600), because the one beam has CMU on it? Seems like overkill to me.
RE: CMU Deflection Limits Extents
Perhaps I am generally being conservative. However, if the total of combined deflections of the entire support structure exceed the l/600 guideline, that could be a potential issue. LPPE's situation is a little unusual in that he has a greater number of members sharing the load from the masonry (relatively rare condition, I think).
RE: CMU Deflection Limits Extents