316 - Ingabe ibanga lethu eliphakeme kakhulu, linokumelana okuhle kakhulu kokugqwala, lifanelekile ukwakha no-welding, kepha kunzima kancane ngomshini.
Simabhele amasheya kanye nezinduku ngamadayimitha asuka ku-3mm kuya ku-76.2mm, ubude kuze kube yi-3m futhi kutholakala kumabanga ama-3 wensimbi.
303 - Unokumelana kahle nokugqwala okuhle, kungacutshungulwa ngokukhululekile, kungalungele ukufudumeza noma ukwakha.
I-304 - inokumelana kahle nokugqwala okuhle, ilungele ukwakha kanye nokushisa, imishini ejwayelekile.
Imigoqo yensimbi engagqwali ayinzima futhi ihlala isikhathi eside. Ziyaguquguquka futhi ngakho-ke zitholakala ezinhlobonhlobo zezinsizakalo.