Zokonzedweratu kuti zikhazikike mwachangu komanso zosavuta, zitha kugwiritsidwa ntchito m'magawo opyapyala a konkriti yamiyala yolimba.
Masitayilo ammutu pa pulogalamu iliyonse.
Miyezo yoyesedwa yomwe ili pansipa idapezedwa pogwiritsa ntchito konkire ya 200-250kgs/cm (palibe kuphatikiza).
Kugwira ntchito kotetezeka sikuyenera kupitirira 25% ya mtengo womwe watchulidwa.

Kagwiritsidwe:Choyamba, tiyenera kugwiritsa ntchito kubowola magetsi kubowola kukula kwake kwa dzenje;
Chachiwiri, kuika kuwonjezera pulagi mu dzenje;
Pomaliza, kugwiritsa ntchito screwdriver kumangitsa wononga mu chubu chokulitsa mpaka malo omwe atchulidwa