A three hinged parabolic arch rib is acted upon by a single load at th – McqOptions

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1.	A three hinged parabolic arch rib is acted upon by a single load at the left quarter point. If the central rise is increased and the shape of arch altered to segmental without changing the other details, the horizontal thrust will
A.	increase definitely
B.	decrease definitely
C.	be difficult to predict
D.	increase or decrease depending upon the radius of the segmental arch
Answer» C. be difficult to predict

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