1. Inzira ya kabili ifite porogaramu nini, ubukana bwinshi, uburemere bworoshye,
imiterere ishyize mu gaciro, iruta amashanyarazi hejuru, igiciro gito, ubuzima burebure,
imbaraga zo kurwanya ruswa, kubaka byoroshye, insinga zoroshye, zisanzwe
kwishyiriraho, kugaragara neza nibindi biranga.
2. Uburyo bwo kwishyiriraho inzira ya kabili iroroshye. Bashobora gushyirwa hejuru
hamwe numuyoboro utunganijwe, uzamurwa hagati ya etage na girder, ushyizwemo
imbere n'urukuta imbere, urukuta rw'inkingi, urukuta rwa tunnel, banki ya furrow, narwo rushobora kuba
yashyizwe kumurongo ufunguye neza cyangwa kuruhuka.
3. Inzira ya kabili irashobora gushyirwaho itambitse, ihagaritse. Bashobora guhindura inguni,
kugabanwa ukurikije "T" urumuri cyangwa rwambukiranya, rushobora kwagurwa, kuzamurwa, guhindura inzira.