Cov khoom ntawm fireproof qhov rooj xauv yog cov khoom ruaj khov, thiab nws tsis yooj yim rau kev puas tsuaj thaum muaj xwm txheej, yog li nws muaj kev tiv thaiv zoo. Tsis tas li ntawd, yog tias muaj hluav taws kub, qhov kub tsis kam ntawm qhov hluav taws kub qhov rooj xauv kuj tseem tuaj yeem pab ncua qhov hluav taws kub thiab ncua sij hawm khiav tawm.