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