Bar Barni ubwoko bwibyuma bikozwe muburyo bwa T.Kuberako igice cyacyo ninyuguti yicyongereza "T" izina rimwe.
T Bar ibyuma byubakairashobora kugabanwa muburyo bubiri:
1. Igabanijwemo ibice bya H-igice.Icyuma cya T-igice gikoresha ibipimo bimwe na H-igice cyicyuma (GB / T11263-2017), kandi nikintu cyiza cyo gusimbuza ibyuma bibiri-gusudira.Ifite ibyiza byubushobozi bukomeye bwo kunama, kubaka byoroshye, kuzigama ibiciro hamwe nuburemere bwubaka.
2. Ibyuma bishyushye bishyushye T bikoreshwa cyane mubyuma no kuzuza ibyuma.