Ukuqonda uZ Purlin ulwakhiwo lwentsimbi: Isiqalo esiphambili kulwakhiwo lwanamhlanje

Izakhiwo zentsimbi ze-Z purlin zizinto ezibalulekileyo kulwakhiwo lwangoku, ngakumbi kummandla wezakhiwo zentsimbi kunye nezakhelo. Ezi purlins, zimile njengonobumba "Z," zisebenza njengezinto zesibini ezixhasa uphahla kunye neenkqubo zodonga, ukuvumela ukuhanjiswa komthwalo okufanelekileyo kunye nozinzo oluphuculweyo. Imilo yabo ekhethekileyo ayiniki amandla nje kuphela kodwa ikwavumela ukuba ikhawuleze kwaye lula