The strength load on the steel cross arm and brief introduction of fober renforced crossarm.

The load on the cross arm can generally be decomposed into three types: lateral load, longitudinal load, and vertical load. The lateral load is the load along the direction of the cross arm, such as the direct pole commercial wire, the horizontal wind force of the ground wire, the corner pole wire, and the ground wire tension. The horizontal and lateral component force, etc.; the longitudinal load is the load perpendicular to the cross arm direction, such as the component of the conductor, the ground wire tension in the vertical cross arm or the ground wire support direction, etc.; the vertical load is the load perpendicular to the ground direction, such as wires, The gravity of the ground wire, etc.

Glass fiber reinforced composite material (Glass Fiber Reinforced Polymer, referred to as GFRP) is made by mixing glass fiber and matrix material in proportion. It has the advantages of light weight, high strength, insulation, corrosion resistance, low cost, etc. The defects of traditional materials in construction have been widely used in transmission line towers in recent years. The cross arm is a cantilever structure used to hang the transmission line on the transmission line tower. It is made of composite materials, which can reduce the frequency of lightning breakdown, pollution flashover and other faults; reduce the height and width of the transmission corridor, and reduce the height and weight of the transmission tower. ; Reduce operation and maintenance costs and improve economic benefits.