Lyuklar

Listed fusible-link type louvers to a maximum size of 24" x 24" are permitted in 1-1/2-hour and 3/4-hour fire doors, with the louver mounted in the bottom half of the door. Loverers 1 / {8}} {20 daqiqada) baholangan eshiklar yoki tutun va yig'inning bir qismi bo'lishi mumkin bo'lgan boshqa soatlik reytinglarning eshiklari ishlatilmasligi mumkin. Shisha chiroqlar bilan eshiklar yoki yong'in chiqish moslamalari bilan jihozlangan eshiklar lyukilovga ega bo'lmasligi mumkin.