• Welcome to the new and improved Building Code Forum. We appreciate you being here and hope that you are getting the information that you need concerning all codes of the building trades. This is a free forum to the public due to the generosity of the Sawhorses, Corporate Supporters and Supporters who have upgraded their accounts. If you would like to have improved access to the forum please upgrade to Sawhorse by first logging in then clicking here: Upgrades

5A Beam Protection

F

Frank Karp

Member
Joined
Oct 20, 2011
Messages
13
Location
Rhode Island
First time doing a 3-story, 5A hotel - wow. We have most of it figured out, but can't find a 1 hour assembly to protect a primary steel beam. All 3 UL assemblies show steel/conc composite deck. We have plywood floor sheathing with 3/4" concrete topping using UL No. L570. Where else can I search? Or am I missing something? Must be fairly common. Thanks.
 
Most of the steel fit within the floor/ceiling assembly Builder Bob - a few deeper beam do not. I'm looking at Table 601 differently now after your question. If my floor assembly is 1 hour rated, is all the structure (primary and secondary) protected? I was thinking we needed to protect primary beams separately within the envelope. Thanks.
 
So my challange remains finding a 1 hour rated assembly/encasement for a steel beam (usually with a 2x nailer for the joist hangers and subfloor support/attachment) under plywood subfloor having a 3/4" concrete topping. Nothing in UL (that I found.) GA BM 1137 comes a bit closer, but still a ways off. Maybe AWC's National Design Standard for some type of equivilency guidance? Anywhere other sources out there?
 
You must log in or register to reply here.
Top