Sab hauv ntawm lub qhov rooj steel fireproof nplooj yog sau nrog tshiab ib puag ncig-phooj ywg nplaim retardant thiab thermal rwb thaiv tsev cov ntaub ntawv. Qhov kev sib tshuam ntawm lub qhov rooj nplooj thiab lub qhov rooj ncej thiab ib puag ncig ntawm lub iav fireproof yog kho nrog fireproof sealing, uas zoo heev txhim khu kev ua tau zoo ntawm lub qhov rooj hluav taws kub.

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