Calculate the transmission length at the end of a pre-tensioned beam as per Hoyer's method using the following data: Span of the beam = 50 m Diameter of wires used = 7 mm Coefficient of friction between steel and concrete = 0.1 Poisson's ratio for steel = 0.30 Poisson's ratio for concrete = 0.15 E = 210 kN/mm² and E= 30 kN/mm² Ultimate tensile strength of steel wire.fp = 1500 N/mm² Initial stress in steel.fpi= 0.7fpu = 1050 N/mm² Effective stress in steel, fpe = 0.6 fpu = 900 N/mm².

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