Lub tsev so yeej ib txwm yog ib qho tseem ceeb ntawm kev tiv thaiv hluav taws, thiab nws yog ib qho tseem ceeb tshwj xeeb los ua txoj haujlwm zoo ntawm kev tiv thaiv hluav taws. Lub qhov rooj tua hluav taws hauv tsev so yuav tsum tau nruab rau ntawm qhov chaw khiav tawm ntawm cov ntaiv, chav faib hluav taws xob, thiab cov kav dej kom zoo. Lub qhov rooj hluav taws hauv tsev so yuav tsum yog qib A, uas yog, steel qib A qhov rooj hluav taws.

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hluav taws kub resistant qhov rooj manufacturers,hluav taws qhov rooj tuam txhab uas muag nyob ze kuv,ob chav steel ruaj ntseg qhov rooj nrog kho vajtse, duab ntawm ntoo kev ruaj ntseg qhov rooj rau flats, ruaj ntseg qhov rooj 820,hluav taws kub ntsuas qhov rooj tsum,kev nyab xeeb qhov rooj yees duab, 9 ko taw qhov rooj sab hauv,hluav taws qhov rooj muab khoom thiab haum nyob ze kuv,labeled vaj huam sib luag qhov rooj,

ntoo fireproof doorshollow,hluav taws qhov rooj tuam txhab uas muag nyob ze kuv,siv qhov rooj thaum muaj xwm ceev, hluav taws kub ntsuas qhov rooj ul, hluav taws kub ntsuas qhov rooj nyob