Question

A stress-crossing overhead transmission line has a span of 150 m
over the stream. Horizontal wind pressure is 20 kg/m2 and the
thickness of ice is 1.25 cm. Diameter of conductor is 2.80 cm and
weight is 1520 kg/km, and an ultimate strength of 12900 kg. Use a
factor of safety of 2 and 912 kg/m3 for the weight of ice,
determine the following:

(a) Weight of ice in kg per meter

(b) Total vertical load on conductor in kg/m

(c) Horizontal windforce exerted on line in kg/m

(d) Effective load acting on conductor in kg/m

(e) Sag in m

(f) Vertical sag in meter

Answer #1

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