The steel structure grid is a spatial structure formed by a plurality of rods connected by nodes according to a certain grid form. It generally has a regular quadrangle cone, triangle cone and other structural forms.

Frame structure is mainly used for large and simple structures, such as plant, warehouse, hoist bracket, and factory office building etc. Structural steel components can be quickly manufactured off-site and then transported to the construction site when needed, minimizing on-site labor requirements and reducing the impact of variables that may delay a project, such as inclement weather.

Truss has a wide application in steel structure. Steel truss is commonly used as a main component of load-bearing structure in roof ( roof truss, etc. ) ..