SSC JE Civil Engineering 2015 Solved Paper

Length covered by crank = d (effective length) for 45° bends length of crack = d/ sin 45° = 1.42 d therefore; Extra length required for one end = 1.42d – d = 0.42d thus if bar is cranked at both ends then total length of the bar = L + 2 × 0.42d, where L = span length.