Pallet racking is also called beam type shelf or pallet racking, belong to heavy shelves, main structure is made up of uprights and beams, columns specifications and types can be divided into the following kinds: 80 x 60 type columns, 90 x 60 type column, type 90 x 67 columns, type 100 x 67 columns, 120 x 72 columns, 120 x 95 columns, beams articulated adjust the distance of 75 mm, 76.2 mm, such as three distance, through the post card will beam with beam welding strong articulated on the pillar. Pallet racking is the most common use of a shelf, providing 100% of access, and has a good selection efficiency, but its storage density is low, need more roadway. Usually use a 3-6 layer, shelf height due to the effect of ordinary forklift lifting height, usually high in about 6 m to 8 m. Points of beams and P type main beams buckled beam two and hold button bar specifications and types can be divided into 6 types: 80 * 50; 100 * 50; 110 * 50; 120 * 50; 140 * 50160 * 50; P type hold button bar specification is divided into three dimensions, respectively: 100 * 50; 120 * 50; 140 * 50 standard thickness of 1.5 mm, can also according to the load of the actual needs, making different thickness, the range of 1.5 mm - 2.0.