Flat steel na-ezo aka nchara 12-300 mm n'obosara na 3-60 mm gbara ọkpụrụkpụ nwere akụkụ akụkụ anọ na ntakịrị ihu. Ewepụghị nchara nwere ike gwụchaa nchara, enwere ike iji ya dị ka ọkpọkọ welded oghere na obere mbadamba maka mpempe akwụkwọ. Ọkpụrụkpụ bụ 8 ~ 50mm, obosara bụ 150-625mm, ogologo ya bụ 5-15m, na ogologo nkọwa ngwaahịa dị oke, nke nwere ike gboo mkpa ndị ọrụ. Kama efere efere, enwere ike ịgbado ya ozugbo na -egbughị ya.