Chapter 1 - Measuring & Calculating Roofs

Question 1

What is the calculation for determining roof slope?

Answer 1

Total Rise (in inches) / 12 (inches per foot of run)

Question 2

What is the total span of a roof?

Answer 2

The horizontal distance from one eave of roof to other eave.

Question 3

What is the equation for calculating roof slope?

Answer 3

2 * (Pitch)

Question 4

What are roof rafters?

Answer 4

The inclined member of the roof frame

Question 5

What is the difference in a common rafter and a ridge rafter?

Answer 5

Common rafter: Runs perpendicular to roof ridge board.

Ridge rafter: runs parallel to ridge rafter.

Question 6

What is a hip rafter?

Answer 6

Rafter that extends diagonally from outside corner of building to the ridge board.

Question 7

What is a valley rafter?

Answer 7

Rafter that extends diagonally from inside corner of building to the ridge board.

Question 8

What are these types of rafters:
* Hip Jack Rafter
* Valley Jack Rafter

Answer 8

Hip Jack Rafter: Rafter that extends from outside wall (not corner) to hip rafter

Valley Jack Rafter: Rafter that extends from outside wall (not inside corner) to valley rafter.