1. Amathreyi ekhebula anokusebenza okubanzi, ukuqina okuphezulu, isisindo esilula,
isakhiwo esinengqondo, ukufakwa kukagesi okuphezulu, izindleko eziphansi, impilo ende,
ukumelana nokugqwala okuqinile, ukwakhiwa okulula, izintambo eziguquguqukayo, okujwayelekile
ukufakwa, ukubukeka okukhangayo njll izici.
2. Indlela yokufaka amathreyi ekhebula ayaguquguquka. Angase abekwe phezulu
kanye nepayipi lenqubo, eliphakanyiswe phakathi kwaphansi namagida, afakwe kulo
odongeni lwangaphakathi nangaphandle, udonga lwensika, udonga lomhubhe, ibhange lemisele, nakho kungaba
efakwe endaweni evulekile eqondile noma endaweni yokuphumula.
3. Amathreyi ekhebula angabekwa avundlile, ame mpo. Bakwazi ukujika i-angle,
ihlukaniswe ngokomugqa "T" noma ngokuphambana, inganwetshwa, iphakanyiswe, ishintshwe ithrekhi.