Seb nws yog lub qhov rooj hluav taws xob steel lossis lub qhov rooj nplaim hluav taws, vim tias lawv txhua lub qhov rooj hluav taws, lawv yuav tsum muaj tib qho.
Tib yam yog tias ob qho tib si muaj thav duab, lub qhov rooj thiab kho vajtse.Yog li no, muaj ntau yam nyob rau hauv cov txheej txheem ntau lawm, cov ntaub ntawv faus kuj muaj ob qho tib si muaj whi thiab ul.
Qhov sib txawv yog cov qauv, khoom thiab kev ntsuas hluav taws thiab lwm yam.
Firstly, tus hlau hluav taws kub yog ua los ntawm galvanized steel, txias-rolled steel thiab galvanealed.Tiam sis lub qhov rooj ntoo yog ua txhua yam ntoo.
Thib ob, tag nrho, cov txheej txheem ntau lawm rau cov hlau hluav taws kub tsis yog cov txheej txheem ntau dua li cov ntoo hluav taws ntoo.
Thib peb, nyob rau hauv lub qhov kev ntsuas hluav taws kuj tseem sib txawv, qhov hluav taws kub sib tham, qhov hluav taws kub ntsuas rau qhov hluav taws kub ntev dua qhov chaw ntoo.
