Resin vile cov txheej txheem teeb tsa thiab cov txheej txheem

Purlins tuaj yeem ua cov txheej xwm square (60 × 40 × 3mm), cov steel × 20 hli), lossis tshuaj tiv thaiv ntoo squares (60 × 40mm).
Purlins yuav tsum tau nrug 660mm sib nrug thiab npaj los ntawm hauv qab mus rau saum.
Thaum txhim kho cov nplais loj, ua raws cov kev taw qhia hauv zos thiab nruab nws hauv thim rov qab. Overlap ib lub pobzeb nthwv dej thiab nruab ob sab tib yam.
Thaum txhim kho lub Ridge Pobzeb, txiav tawm ib ntu ntawm cov nplais thawj zaug ua ntej kev txhim kho.
Cov overlaps ntawm Ridge thiab kab pheeb ces kaum vuas yuav tsum tau pom tusyees. Tom qab Ridge thiab kab pheeb ces kaum npoo vuas yog ntsia, nruab plee vuas luaj.
Cov kev txhim kho yog cov khoom siv tshwj xeeb. Thaum kho, thawj tho ib lub qhov nrog lub laum hluav taws xob. Lub qhov taub uas hla yuav tsum tau 2mm loj dua tus nuv ntsia hlau.
Tus kheej -} tapping screws nrog txoj kab uas hla ntawm 6.3mm tau pom zoo.