Kev faib tawm ntawm cov qhov rooj hluav taws steel yog qhov tseeb. Raws li qhov sib txawv ntawm qhov hluav taws kub ntawm lub qhov rooj hluav taws, nws qhov hluav taws kub tuaj yeem muab faib ua A, B, C peb qib, ntau qib ntawm steel qhov rooj hluav taws tuaj yeem siv rau ntau qhov chaw.

hluav taws daim ntawv lo qhov rooj,hluav taws kub qhov rooj vs qhov rooj qub, hluav taws kub ntsuas qhov rooj ncaws phaj,kev cai qhov rooj qhov ntev, qhov rooj ntsuas cov ntawv,

hluav taws kub resistant qhov rooj manufacturers,hluav taws daim ntawv lo qhov rooj,fireproof lub qhov rooj, hluav taws pov thawj qhov rooj khoom,kev cai qhov rooj qhov ntev,Hluav taws kub ntsuas qhov rooj thickness, steel qhov rooj x, Thaum muaj xwm ceev tawm qhov rooj siv, hluav taws nyob qhov rooj 90 feeb,qhov rooj rating labels,

ntoo fireproof qhov rooj,hluav taws daim ntawv lo qhov rooj,siv qhov rooj thaum muaj xwm ceev, hluav taws kub ntsuas qhov rooj ul, hluav taws kub ntsuas qhov rooj nyob