Ngelixa imithombo ye-oyile ye-torsion eshushu ishushu kwaye icinywe kwi-oyile, imithombo ye-zinc-galvanized iphantsi kwenkqubo ye-galvanization ye-hot-dip.Le nkqubo ibandakanya ukuntywiliselwa umthombo wentsimbi kwivati ye-zinc etyhidiweyo kumaqondo obushushu aphezulu kakhulu.
Abantu abaninzi bakhetha imithombo ye-zinc-galvanized torsion ngenxa yokuxhathisa kwabo ngokumangalisayo kwirusi kunye nokubola, umbulelo omkhulu kwinkqubo yokutshisa i-galvanization.Ikhululekile kwisoyikiso esiqhubekayo sokwakheka komhlwa, imithombo ye-zinc-galvanized inika ubomi obude kunemithombo emininzi enomsindo we-oyile.