Theory of Structures

Q1: For determining the support reactions at A and B of a three hinged arch, points B and C are joined and produced to intersect the load line at D and a line parallel to the load line through A at D'. Distances ADDD' and AD' when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is

A 30°

B 45°

C 60°

D 90°

ANS:D - 90°

It is the Right angle triangle theory for arch.



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