Lub qhov rooj ncej, qhov rooj nplooj ncej thiab lub qhov rooj nplooj vaj huam sib luag yog ua los ntawm cov ntaub ntawv steel rau qhov rooj tua hluav taws. Yog hais tias lub qhov rooj nplooj puv nrog cov ntaub ntawv, nws yuav tsum tau ntim nrog cov khoom tsis muaj tshuaj lom thiab tsis muaj teeb meem hluav taws kub thiab cov khoom siv hluav taws xob. Fireproof sealing yog ua tiav ntawm qhov sib txuas ntawm lub qhov rooj nplooj thiab lub qhov rooj ncej ntawm lub qhov rooj fireproof thiab nyob ib ncig ntawm lub iav fireproof, uas zoo heev txhim kho cov hluav taws kub.