. Electrical news and engineering. Fig. 10—Structure and stress diagrams for three elementary types oftransmission line towers under concentrated test load of poundshorizontal. The dotted ties carry no stress with the load on the sideas shown. No allowance for weight. « which is added to the length of the catenary will cause aconsiderable reduction in the tension. Now- everj- transmis-sion tower will yield a few inches without failing, and soautomatically relieve the horizontal load. However, it is considered good practice to assume work-ing conditions a little more severe than they act
. Electrical news and engineering. Fig. 10—Structure and stress diagrams for three elementary types oftransmission line towers under concentrated test load of poundshorizontal. The dotted ties carry no stress with the load on the sideas shown. No allowance for weight. « which is added to the length of the catenary will cause aconsiderable reduction in the tension. Now- everj- transmis-sion tower will yield a few inches without failing, and soautomatically relieve the horizontal load. However, it is considered good practice to assume work-ing conditions a little more severe than they actualh- are. andthe average test requires of a suspension tower that it shallnot fail until a pull amounting to the tension in half of theconductors on one side is applied. Except in the case ofvery small conductors, this stress is considerably greater thanthe transverse wind load, and forms the basis of the designfor the towers. It is obviously unsatisfactory to design atower with light bracing in one direction and heavier membe
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