1, Muujiye hiitarka ilig fuula iyadoo la adeegsanayo masar (majarafad) gaar ah oo ku jirta gabal aluminium ama saxan naxaas ah, daabku waa la jeexjeexay oo la taagay.
Faa'iidooyinka 2 Ka gudub saxanka kuleylka caadiga ah ee xadka dheer ee saamiga dheer, wuxuu soo saari karaa cufnaanta sare ee kuleylka kuleylka, waa mid ka mid ah garbaha iyo saldhigga, ma jiro wax isdifaac ah oo dhexdhexaad ah, kuleylka / miraha waa mid aad u wanaagsan, oo u dhow qalabka shucaaca aluminiumka, si ballaaran loo adeegsaday warshadaha nalka korantada, gawaarida korontada ku shaqeeya, qalabka wax lagu beddelo, isgaarsiinta iyo alaabada qalabka caafimaadka.
3 cilladood oo ah qiimaha sheybaarka kuleylka kuleylka ee ilkaha lagu iibiyo ayaa aad u badan, qashinkana waa la soo saaray, waxaana jira qaddar cayiman oo guuldarro ah, marka majarafadku uu aad u dheer yahay hiitarka, bareeg kasta oo dhererkiisu yahay 150mm wuxuu lahaan doonaa 4mm ama sidaas jeexdin.
4. Awoodda hawsha: ballaca ugu sarreeya 800mm, dhererka iligga 100mm, cirridka ilkaha (0.1mm-7.5mm), dhumucda ilig (0.1mm-7.5mm) dulqaad +/- 0.2mm