... are built-up columns,crane girders are welded I beam and braked truss,and install walk safe path. ... is complicant with the locations of the crane beam behind the door.2. There are total of ... workshop, garage etc, steel beams, other riveting and welding parts.2)We can also make and develop new ... ) Base: Cement and steel foundation bolts4) Column and beam: Material Q345(S355JR)or Q235(S235JR) steel, all ...