Steel poob lub zog thaum rhuab txaus. Covqhov kub thiab txiasntawm tus tswv cuab steel yog qhov kub ntawm qhov uas nws tsis tuaj yeem txhawb nqa nws cov load. Cov cai hauv tsev thiab cov qauv kev tsim vaj tsev tsim qauv ntsuas ntsuas qhov kub thiab txias sib txawv nyob ntawm seb hom qauv, kev teeb tsa, kev taw qhia, thiab cov yam ntxwv thauj khoom. Qhov ntsuas kub tseem ceeb feem ntau suav tias yog qhov ntsuas kub uas nws cov txiaj ntsig kev ntxhov siab tau txo qis mus rau 60% ntawm chav tsev kub tawm los ntawm kev ntxhov siab.In thiaj li txiav txim siab qhov ntsuas hluav taws kub ntawm cov tswv cuab steel, lees txais kev suav kev xyaum tuaj yeem siv, lossis kuaj hluav taws. tuaj yeem ua tau, qhov ntsuas kub tseem ceeb uas tau teeb tsa los ntawm tus qauv lees paub rau Lub Tsev Haujlwm Saib Xyuas Kev Ncaj Ncees, xws li cov cai hauv tsev. Hauv Nyij Pooj, qhov no yog qis dua 400 degree.
Hauv Suav teb, Europe thiab North America (xws li ASTM E-119), qhov no yog kwv yees li 1000–1300 degree F (530–810 degree ). Lub sij hawm nws yuav siv sij hawm rau cov khoom hlau uas raug kuaj kom ncav cuag qhov ntsuas kub los ntawm cov qauv ntsuas ntsuas ntsuas lub sijhawm ntawm qhov ntsuas hluav taws kub. Thaum tshav kub kub hloov mus rau cov hlau tuaj yeem ua kom qeeb los ntawm kev siv cov khoom siv hluav taws kub, yog li txwv cov hlau kub. Cov txheej txheem hluav taws kub zoo rau cov qauv hlau muaj xws li intumescent, endothermic, thiab plaster txheej nrog rau cov phab ntsa qhuav, calcium silicate cladding, thiab ntxhia wool insulating pam.
Cov vaj tse pob zeb feem ntau ua tau raws li qhov yuav tsum tau muaj kev ntsuas hluav taws-tiv thaiv, vim tias cov pob zeb tuab ntawm cov hlau rebar muab hluav taws kub txaus. Txawm li cas los xij, pob zeb tuaj yeem raug spalling, tshwj xeeb yog tias nws muaj cov ntsiab lus siab noo noo. Txawm hais tias ntxiv fireproofing tsis yog feem ntau siv rau cov vaj tse pob zeb, qee zaum nws yog siv nyob rau hauv cov tsheb thauj mus los thiab cov chaw uas muaj hluav taws kub hnyiab tau ntau dua, vim tias cov hluav taws kub hnyiab tau muab cov hluav taws kub ntau dua rau cov txheej txheem piv rau hluav taws uas muaj cov hluav taws kub zoo tib yam thaum lub sij hawm combustibles. tib lub sijhawm hluav taws. Cov txheej txheem steel fireproofing cov ntaub ntawv muaj xws li intumescent, endothermic thiab plaster txheej nrog rau cov phab ntsa ntub dej, calcium silicate cladding, thiab ntxhia los yog kub rwb thaiv tsev ntaub ntaub pam. Kev saib xyuas yog muab rau kev sib txuas, vim tias qhov thermal expansion ntawm cov qauv tsim tuaj yeem cuam tshuam cov hluav taws kub-tiv thaiv cov rooj sib txoos.
