Q. 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 ποΈ Show Answer π¬ Discuss π Share β‘Menu β Correct Answer: (D) 1/8 to 1/12 of the span