HMI offers a wide range of rolling steel doors to meet the most demanding fire safety standards, unusual opening sizes and discerning aesthetic requirements. Designed to close automatically in the event of a fire or alarmed event. Our fire-rated...
3 hour approved for doors in dividing fire walls with openings not exceeding 51 sq. ft. in area. 1.5 hour approved for doors in vertical shaft openings not exceeding 51 sq.ft.in area. 75 hour approved for doors in corridor or room-partition...
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