Are 60-minute fire-rated doors common?

Old 06-29-17, 01:28 PM
Thread Starter
Join Date: Mar 2009
Location: Northern Virginia
Posts: 3,913
Received 27 Upvotes on 21 Posts
Are 60-minute fire-rated doors common?

My builder put a note on my garage plans that states I will be using a 60-minute fire-rated door. However, code states a minimum of 20-minutes will suffice. Most of the doors I am finding at the big box stores are 20 minute, so I'd prefer to go with a 20-minute door. I don't want to special order or pay more for a 60 minute door if I don't need to. Is there really much cost difference between the two? If my approved plans have a note saying 60 minute, am I held to that even though code specifies 20 minute will suffice?
Old 06-29-17, 06:39 PM
Gunguy45's Avatar
Super Moderator
Join Date: Dec 2007
Location: USA
Posts: 19,281
Received 6 Upvotes on 6 Posts
Yes there is that much of a difference but you shouldn't need a 60min. That's normally commercial I believe. They cost so much more because they don't just have metal skins and foam fill. Normally it's like a thick layer of sheetrock IIRC. For some reason I thought to get a true 60 min, it had to have a metal frame as well.

Normally a visit to the Codes office will clear it right up. They'll annotate and restamp. Happened with me that way anyway.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: