supply steel frame Certificate:ISO9001:2000 Grade:Q235,Q345 customer designed,easy to ... span,double-span ,Multi-span,single floor,double floors!3.base:cement and steel foundation bolts4.column and beam:material Q345 ... .surfrace:Paint or hot dip galvanize!10.packing :main steel frame without packing load in 40'OT,roof and wall panel ... building are customized, pls feel free to contact us! steel frame