Lub qhov rooj hluav taws steel muaj ntau hom kev qhib kev ua haujlwm sib txawv, thiab tseem muaj ntau yam kev ua haujlwm, uas tuaj yeem raug kaw zoo lossis cais tawm. Thaum tshav kub kub, suab, plua plav thiab tub sab tub nyiag, thiab steel qhov rooj hluav taws tuaj yeem hloov mus rau ntau qhov chaw rau kev teeb tsa thiab siv.

yaug hluav taws qhov rooj,hluav taws kub ntsuas qhov rooj kick phaj,20 feeb hluav taws qhov rooj,tsis siv neeg hluav taws qhov rooj,

hluav taws kub resistant qhov rooj manufacturers,yaug hluav taws qhov rooj,ob chav steel ruaj ntseg qhov rooj nrog kho vajtse, duab ntawm ntoo kev ruaj ntseg qhov rooj rau flats, ruaj ntseg qhov rooj 820,20 feeb hluav taws qhov rooj,kev nyab xeeb qhov rooj yees duab, 9 ko taw qhov rooj sab hauv,tsis siv neeg hluav taws qhov rooj,labeled vaj huam sib luag qhov rooj,

ntoo fireproof doorshollow,yaug hluav taws qhov rooj,siv qhov rooj thaum muaj xwm ceev, hluav taws kub ntsuas qhov rooj ul, hluav taws kub ntsuas qhov rooj nyob