NFPA 80 5. 2.4.requires cov khoom hauv qab no yuav tsum txheeb xyuas cov khoom hauv qab no, yam tsawg kawg:
Tsis muaj qhib qhov lossis tawg nyob rau hauv thaj chaw ntawm lub qhov rooj lossis thav duab.
Glazing, lub zeem muag lub teeb ntas & glazing hlaws dai yog lawm thiab ruaj khov nrawm hauv qhov chaw, yog tias muaj.
Lub qhov rooj, ncej, hinges, kho vajtse, thiab noncomplectible chaw yog nyab xeeb, ua raws li kev txiav txim siab, thiab hauv kev ua haujlwm tsis pom kev puas tsuaj.
Tsis muaj qhov chaw ploj lossis tawg.
