Cov qhov rooj hluav taws peb feem ntau yog xa mus rau cov hluav taws kub rwb thaiv tsev qhov rooj (piv txwv li Class A qhov rooj hluav taws), uas tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm hluav taws kub zoo thiab thermal rwb thaiv tsev tib lub sijhawm hauv lub sijhawm teev. Lub qhov rooj hluav taws nrog qhov ntsuas hluav taws kub tsis pub tsawg tshaj 1.5h.

4 vaj huam sib luag hlau qhov rooj,hluav taws kub qhov rooj vs qhov rooj qub, hluav taws kub ntsuas qhov rooj ncaws phaj,5 vaj huam sib luag hlau qhov rooj, 6 vaj huam sib luag hlau qhov rooj,

hluav taws kub resistant qhov rooj manufacturers,4 vaj huam sib luag hlau qhov rooj,fireproof lub qhov rooj, hluav taws pov thawj qhov rooj khoom,5 vaj huam sib luag hlau qhov rooj,hluav taws kub ntsuas qhov rooj thickness, steel qhov rooj x, hluav taws kub nyob qhov rooj 2 teev, hluav taws nyob qhov rooj 90 feeb,6 vaj huam sib luag hlau qhov rooj,

ntoo fireproof qhov rooj,4 vaj huam sib luag hlau qhov rooj,hlau qhov rooj 36 x 80, hluav taws kub ntsuas qhov rooj ul, hluav taws kub ntsuas qhov rooj nyob