Racking system and building roof constitute an indivisible whole, the upright of racking supports the roof loading directly, on both sides of the pillar installed the building enclosure structure. Racking system is usually combination beam type racking system to store goods, but also to support the roof, wind load, snow load and etc. It can be constructed for ordinary high rack warehouse, but also can be constructed for the automated warehouse. Warehouse can be simple open or closed. As a whole warehouse, it can be set up a number of doors and windows, ventilation systems, fire systems and etc. according to the needs, just like the standard of steel structure warehouse.