... all kinds of steel structures, steel building, metal building, modular house, steel frame for warehouse, workshop, garage etc, steel beams, other riveting ... grade enterprise of construction qualification and group member of China steel structure society.1.Size:MOQ is 800 square meter, ... Column and beam:material Q345(S355JR)or Q235(S235JR) steel, all bolts connection !straight cross-section or Variable ...