... supply all kinds of steel structures, steel bulding, metal building, modular house, steel frame for warehouse,workshop, garage etc, steel beams, other riveting and ... ) Column and beam:Material Q345(S355JR)or Q235(S235JR) steel, all bolts connection! Straight cross-section or Variable cross- ... max lift capacity, max wheel pressure and min wheel pressure! prefab steel constrution warehouse made in China