Kutagiwe nge "contractor-grading"

Ukuchazwa kwe-CIDB Grading: Iigrade 1 ukuya ku-9

Isebenza njani i-CIDB grading eMzantsi Afrika: intsingiselo yegrade nganye ukusuka ku-1 ukuya ku-9, iindidi ezifana ne-GB ne-CE, nobungqina bokunyuka.