Ihe mkpuchi ụlọ
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Ugwu Ulo elu Flat (Steel)
1: Kwesịrị ekwesị maka Flat Rooftop/Ground.
2: Eserese foto na nhazi ala.Nhazi ahaziri ahazi, nwụnye dị mfe.
3: Nwere ike iguzogide oke ihu igwe, na-agbaso AS / NZS 1170 na ụkpụrụ mba ụwa ndị ọzọ dị ka SGS, MCS wdg.