Itshe lemvelo livame ukuhlukaniswa ngezigaba ezintathu: imabula, i-granite kanyeama-slabs e-quartzite.
1. Imabula noma i-granite kufanele kukhethwe ngokwesikhathi sokusetshenziswa. Isibonelo, i-granite kuphela engasetshenziswa phansi yangaphandle, futhi imabula ingcono phansi egumbini lokuphumula, ngoba inamaphethini akhanyayo, imibala ecebile, futhi kulula ukuyifanisa nefenisha yemibala ehlukahlukene.
2. Khetha uhlobo lwamatshe ngokwemibala yefenisha nendwangu, ngoba imabula noma i-granite ngayinye inephethini nombala wayo ohlukile.
Ngemva kokuba itshe selihlotshisiwe, kumele liphathwe nge-ejenti ekhethekile yokuvikela ukuze liveze ngempela ingqikithi yalo futhi lihlale lisha.
Isikhathi sokuthunyelwe: Septhemba-07-2022

