Steel structures provide a safe and reliable space for installing suspension systems, suspension machinery, and drive systems. It not only needs to support the weight of the hardware itself, but also withstand the weight of the scenery and lighting required for normal performances. It should provide convenient access for technicians to provide services and maintenance, flexible suspension equipment platforms for using new sets, and meet temporary or unexpected needs during performances, such as dropping additional ropes to suspend sets (such as lighting fixtures), etc.

The top of the fence is divided into two types: horse track type and fully paved type. The connection between the suspension rod and the theater roof is available in two types: welded type and bolted type. The load on the grape trellis is composed of the suspension beam load, the self weight of the grape trellis, and the dynamic load on the top of the fence.