Friday, September 14, 2007

Door Ratings?

Q: What is the required Fire Resistance Rating for a Door installed in a rated Wall?

A: Refer to Table 5-3 Opening Protectives for Fire Divisions and Fire Separations.Per the Table:

Wall Rating= 3 or 4 hrs = Door Rating of 3 hrs (A Label)
Wall Rating= 2 or 1 1/2 hrs = Door Rating of 1 1/2 hrs (B Label)
Wall Rating= 1 hr = Door Rating of 3/4 hr (C Label)