115. Deformation of Tower Member

Transmission line tower is generally a lattice type steel structure. It consists of a number of steel angles of different L/R Ratio. These are connected together by nuts and bolts. The strength of the tower depends on the strength of these tower members. The strength of the tower member depends on L/R ratio and its stiffness. Stiffer the member, more the load is can bear. Angle between two members should not be less that 15^O. Stiffness of the member is affected if it deforms. Following are the reasons of deformation of tower members.