A transmission line has a span of 250 m between supports, the supports being at the same level. The conductor has a cross-sectional area of 1·29 cm2. The ultimate strength is 4220 kg/cm2 and factor of safety is 2. The wind pressure is 40 kg/cm2. Calculate the height of the conductor above ground level at which it should be supported if a minimum clearance of 7m is to be kept between the ground and the conductor.
