Bino byonna nga byenkanyankanyizibbwa , ojja kuba omaze okutandika ekiyumba ekigerere kyokka faayo ku bipimo ne ky’obagisa (frame) ekiyumba kyo ekigerere. Ennaku zino basinga kukozesa bipooli bya aluminiyaamu (aluminium alloys) kubanga obutaba nga mbaawo , tebyetaaga kusiigako langi oba eddagala ly’ebiwuka so ng’ate emitayombwa gino emitono giyamba ekitangaala okuyingira obulungi mu kiyumba.