Deck 35: Common Rafters

Question 1

A gable roof has a span of 18 feet, common rafter of length 13 feet and overhang of 1 foot. What is the rise per foot of run rounded to one decimal place?

Answer 1

10.6

Question 2

__________ is the number of inches a rafter rises for each 12 inches of run.

Answer 2

Unit rise

Question 3

If a gable roof has a span of 20 feet and a 9 inch rise per foot of run, what is the line length of the common rafter?

Answer 3

12'6"

Question 4

The ridge of a roof is the uppermost structural member of a roof.

Question 5

__________ is the horizontal distance the rafter projects beyond the wall on which it rests.

Question 6

The __________ is the distance along the center line of the rafter that extends beyond the wall.

Question 7

In a gable roof the length of the common rafter is 11 feet, there is a 1 foot overhang, and the span is 16 feet. What is the rise per foot of run?

Question 8

__________ is the hypotenuse of a right triangle, the base of which is the run and the height of which is the rise.

Question 9

The __________ is the horizontal structural member on top of the wall studs.

Question 10

Rafters or trusses are the main structural roof supports.