Izinto zokusika: Ukusaha okubandayo kwensimbi eyomile kufanelekile ekucubunguleni insimbi enamafutha aphansi, insimbi yekhabhoni ephakathi nendawo nephansi, insimbi ephothiwe, insimbi yesakhiwo kanye nezinye izingxenye zensimbi ezinobunzima obungaphansi kwe-HRC40, ikakhulukazi izingxenye zensimbi ezilungisiwe.
Isibonelo, insimbi eyindilinga, insimbi ye-engeli, insimbi ye-engeli, insimbi yesiteshi, ishubhu eliyisikwele, i-I-beam, i-aluminium, ipayipi lensimbi engagqwali (lapho usika ipayipi lensimbi engagqwali, ishidi lensimbi engagqwali elikhethekile kumele lishintshwe)