Q. Rise of a Jack arch is kept about (Solved)
1. 1/2 to 1/3 of the span
2. 1/3 to 1/4 of the span
3. 1/4 to 1/8 of the span
4. 1/8 to 1/12 of the span
- d. 1/8 to 1/12 of the span
1. 1/2 to 1/3 of the span
2. 1/3 to 1/4 of the span
3. 1/4 to 1/8 of the span
4. 1/8 to 1/12 of the span