The Diffrent Fire Rated Time On Steel Hollow Matal Door Approved With SDI Files

The Diffrent Fire Rated Time On Steel Hollow Matal Door Approved With SDI Files

Date:Jan 13, 2020

Steel fire doors are “rated” by time (in minutes or hours) that a door can withstand exposure to fire test conditions. Hourly fire ratings include 1-1/2-hours1-hour3/4-hourand 1/3-hour, or 3 hours with the maximum ratingrequired of any swinging type fire door being three hours

our factory  got the fire rated steel hollow metal doors with UL WHI or FM certicates .


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