Usually build a two floors or three floors steel structure garret in the warehouse, so that to change a floor to two floors, three floors. Goods from ground to second floor by truck or cargo lift, then by small trolley of Hydraulic truck to the pointed place. combine with ferroconcrete garret, it has operate quickly, reasonable cost ,easy to assemble and dismantle, beautiful appearance structure characters. The distance of upright frame is 4 or 6 meters ,first floor about 3 meters height, and second and third floor is about 2.5 meters. The upright frame is made by rectangle or circle steel, beam is made by H shape steel, and floor deck is made by cold rolling steel, checkered iron, or steel grating. Generally speaking, the floor load capacity is less than 1000kg/M2 
    This kind garret upstairs or downstairs can be the office to make the management easy. This system suits for the third logistic, mechanism industry and so on.