When installing a 2x4 troffer in a fire rated dropped ceiling, is anything required other than an FR rating on the fixture? I'm specifically interest in special covers that go over the fixture, such as the ones made by TENMAT.

I rarely get into work that requires fire ratings. I don't recall ever seeing anything special being done for a lay in troffer in the fire rated ceilings I've looked in.

Tom

Few things are harder to put up with than the annoyance of a good example.