Steel penetration of fire rated wall
and smoke. In virtually every building, the installation of HVAC and electrical systems requires the penetration of fire resistive assemblies by ducts, pipes, conduit, cables, etc. All model codes contain language which mandates the maintenance of the fire resistance rating of those assemblies (walls, floors, etc.) when they are.
USG Design Studio | Pipe Penetration - Download Details
Description:Fire Doors , Quick Question — Lori I found the graphic below in NFPA 80 all recent editions with a line in Annex A stating that frames should be installed following the general guidelines shown in this figure. When in doubt, check with the frame manufacturer to see what is allowed by their listings and refer to this post regarding existing wall anchors. I also asked UL what is stated in their requirements, because of an architectural detail in question, which showed one layer of GWB penetrating the frame on each side of the wall, and a second layer butted to the frame. The representative from UL said that having the frame wrap one layer on each side is acceptable, and the additional wall finish is not required to be wrapped by the frame.
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