It has been 20 years since the development of dry coal shed structure，the main structural form used is the flat surface steel structure framework, H type steel structure plane truss, plane arch and cylindrical reticulated shell structure. According to the comparison of technical and economic indexes of the dry coal shed structure built up， the membrane structure of steel structure has obvious advantages. At present, it has become the main structural form of dry coal shed structure.
The grid structure is adopted to reduce the gravity of the roof. Generally speaking, the projection area per square meter is 40-70 kg of steel.
With the development of electric power industry, dry coal shed membrane structure has been widely constructed and studied. Due to environmental requirements and strict control of construction, the way of coal bulk storage must be replaced by enclosed membrane structure storage，therefore, the construction of dry coal shed with membrane structure has flourished in recent years.
The main function of the membrane structure of dry coal shed is to cover the coal yard，coal shed with membrane structure is to prevent coal from polluting when it rains and when it is windy. It is an energy saving and environmental protection membrane structure project, mainly function as large storage warehouse. Therefore, it must have a certain storage and working space, i.e. the structure must meet certain clearance requirements. Moreover, the section shape of its effective use space is trapezoid, and the envelope of the working space is close to the arc.
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