Construction Kubaka byihuse n'ingaruka nke ku muhanda wo hasi;
★ Nta gikorwa kinini-cyakorewe-kurubuga;
Degree Urwego rwo hejuru rwo kubaka umutekano no kubaka umuco;
Ubwiza bwubwubatsi bugenzurwa kandi buhamye;
Birakenewe cyane kugirango iterambere rirambye;