Daim iav roj hmab dub tuaj yeem ua haujlwm hauv qhov kub ib puag ncig. Lawv yog cov dej pov thawj, zawv zawg pov thawj thiab tsis muaj juncture. Lawv tuaj yeem raug siv los ua cov khoom siv rau kev ua haujlwm rooj noj mov thiab hauv av kho kom zoo nkauj siv hauv tsev so, natatoriums, auditoria, tshav dav hlau, chaw nres nkoj, nkoj thiab tsheb.
 
Yuav luag txhua qhov chaw siv tiv thaiv hauv pem teb thiab kev nyab xeeb yog qhov tseem ceeb tshaj. Cov ntawv thov suav nrog kev siv dav dav hauv kev lag luam, hauv tsev thiab hauv chaw ua haujlwm rau cov chaw muaj tsheb khiav hnyav, kab kev taug kev, thiab cov npoo av nyuaj lossis los tiv thaiv kev qaug zog. Siv tuab qhov sib txuam rau cov kev pabcuam hnyav hnyav. Cov khoom ua tau zoo suav nrog kev coj ntev ntev, huab cua txhua yam, muaj zog suab zoo yam ntxwv, huv si thiab hnav tsis kam. Yuav tsis caws, ntsws, lossis cais. Cov khoom no tau yooj yim beveled thiab perforated rau kev nkag teb chaws siv mat.