Rise of a Jack arch is kept about – McqOptions

MCQOPTIONS

1.	Rise of a Jack arch is kept about
A.	1/2 to 1/3 of the span
B.	1/3 to 1/4 of the span
C.	1/4 to 1/8 of the span
D.	1/8 to 1/12 of the span
Answer» E.

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