Fireproof dov lub qhov rooj yog ua los ntawm cov khoom siv hluav taws xob. Muaj plaub txheej nyob rau hauv lub fireproof dov shutter qhov rooj. Thawj txheej yog cov ntaub dai kom zoo nkauj, txheej thib ob yog daim ntaub tiv thaiv hluav taws, txheej thib peb yog daim ntaub thaiv hluav taws, thiab plaub txheej yog ntaub thaiv hluav taws xob. Cov khoom siv hauv lub qhov rooj hluav taws kub kuj tseem nyuaj rau hlawv ntawm lub qhov cub roj. Nws qhia nws qhov hluav taws kub.