PRECAST CHANNEL SLABS
PRECAST CHANNEL SLABS
(OP)
Looking for some help for diaphragm action using Precast Channel Slabs ......made back in the 1950's....maybe 1960's. Basically, it is a 8'-0" x 4'-0" x 2-3/4" plank with thicker ribs at the edges. Typically, they are connected to the steel below by a single finger clip at every other channel slab. I have a very large project where the owner is considering renovation or a new facility. The Building Code officials will require that the entire facility be evaluated per our latest IBC codes (2012) and deficient parts and pieces be brought up to code. I am trying to validate a roof diaphragm attached to the steel below but....a thin finger clip is not a legitimate connection. Would all of these panels bind up by friction when loaded? Would I have to go back and begin a process to attach these panels together and then attach the connected panels to the steel framing?






RE: PRECAST CHANNEL SLABS
To some degree but that would be tough to rely on, especially under seismic which may reduce the effective weight of the panels. There's no topping or anything? Horizontal bracing below?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: PRECAST CHANNEL SLABS
RE: PRECAST CHANNEL SLABS
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: PRECAST CHANNEL SLABS
I didn't see any evidence that the clips were welded. I think they were maybe screwed into the channel flange on one side of the joint, but that's about it. I saw nothing to indicate that the system is capable of performing as a diaphragm, but this building required a diaphragm for stability. It's a mystery to me. Luckily we were not required to bring the building up to code due to limited alterations at the roof. Oh, and by the way, it was untopped.
RE: PRECAST CHANNEL SLABS
RE: PRECAST CHANNEL SLABS
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: PRECAST CHANNEL SLABS