Cov qhov rooj hluav taws yog tsim los ntawm ntoo lossis hlau - tab sis qee kis, gypsum thiab txhuas - lossis kev sib txuas ntawm plaub.
Cov qhov rooj hlau feem ntau muaj cov hluav taws kub ntau dua vim tias steel yog cov tsis sib txuas thiab yuav tsis pub hluav taws.
Ntoo hluav taws-rated lub qhov rooj, lub sijhawm no, feem ntau muaj gypsum cov tub ntxhais - lub tshav kub-tiv taus thiab tsis muaj nplaim taws cov ntxhia ntxhia. Gypsum tuaj yeem siv hauv hollow steel qhov rooj ib yam nkaus.
Yog tias lub qhov rooj hluav taws muaj qhov rai no yuav ua los ntawm borosilicate lossis ceramic iav - ob qho tib si yog cov hluav taws kub ntau dua li cov iav txheem. Xws li iav lub qhov rais yuav muaj cov tshuaj tiv thaiv hlau tawg thiab.
Yog tias koj xav paub ntau ntxiv txog peb cov khoom lag luam hluav taws rooj tua hluav taws
