Re: type of lay in fixture for 1hour fire rated ceiling
Brad, yes there are special requirements. The architect should specify the type of structural design, and then the assembly would have to comply with this.
It's not necessarily the fixture, but the way it is installed.
These assemblies are UL designs, and here is
one example for a "Floor-Ceiling Design of Concrete and Steel Joists". (Notice items 11 and 12)
Roger
[ April 15, 2004, 05:46 PM: Message edited by: roger ]