1. Xaiv cov purlins sib raug zoo raws li cov khoom siv hauv tsev sib txawv thiab siv ib puag ncig kom ntseeg tau tias lawv lub zog thiab ruaj khov.
2. Qhov zoo thiab qhov tshwj xeeb ntawm cov purlins yuav tsum ua tau raws li cov qauv tsim nyog, thiab tsis txhob siv cov purlins uas tsis zoo lossis tsis zoo.
3. Thaum lub sij hawm installation, nws yog ib qho tsim nyog yuav tau xyuam xim rau qhov flatness thiab verticality ntawm purlins kom ntseeg tau tias lawv haum zoo nrog lub ru tsev lossis phab ntsa.
4. Tsis tu ncua xyuas thiab tswj cov purlins, thiab hloov cov laus los yog puas purlins raws sij hawm.
[Xaiv]
Raws li cov khoom siv tseem ceeb hauv tsev, cov qauv specifications ntawm lub purlin muaj qhov tseem ceeb siv tus nqi. Xaiv txoj cai purlin tuaj yeem txhim kho kev ruaj ntseg thiab kev nyab xeeb ntawm lub tsev. Kab lus no qhia txog tus qauv specifications, tsis thiab ceev faj ntawm purlins, vam tias yuav pab tau cov neeg nyeem kom nkag siab zoo dua thiab xaiv cov purlins txoj cai.
