Combination assembly, bolted shelf structure combination assembly, bolted shelf structure, usually used for storing heavy objects such as molds, but there is no suitable forklift available on site. Shelf under the altitude generally in 2.5 m, in addition to the top can be designed into a drawer structure, safe and reliable, and can be easily pulled out within 2000 kg/layer weights, supplemented by crane or hoist crane, easy access to goods. Mainly used for storing heavy objects such as molds.