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32 Posts
Hi,
So maybe this is a stupid question, but I'm curious what the different time ratings on fire-rated doors mean. Does 20 minutes mean that the door will withstand fire for 20 minutes, then start burning? Why do they have time ratings and not some other system of rating?
Thanks. I'm trying to figure out if I need a fire rated door and what it all means.
So maybe this is a stupid question, but I'm curious what the different time ratings on fire-rated doors mean. Does 20 minutes mean that the door will withstand fire for 20 minutes, then start burning? Why do they have time ratings and not some other system of rating?
Thanks. I'm trying to figure out if I need a fire rated door and what it all means.