End of the rafter perpendicular to the plumb cut and not parallel to the edges of the rafter see Fig 104


121. (a) What is a work line? (6) Define: rise, run, pitch. (c) What is meant by "rise per foot of run"?

122. Enumerate the steps in laying out a gable rafter.

123. (a) How may the work line be laid off? (&) Under what conditions is it unnecessary to lay off a work line?

124. How is the square placed on the stock to mark the ridge or upper plumb cut of a rafter?

126. (a) Why do many squares have the inches on one side divided in twelfths instead of eighths or sixteenths? (b) Explain and be able to demonstrate the scaling method of determining rafter lengths, (c) What must first be known before this length may be determined? (d) Explain how to use the rafter table in determining rafter lengths, (e) Explain how to use the stepping method in determining rafter lengths. (/) Why is the square-root method seldom used by practical carpenters?

126. (a) Explain how to mark out the bird's mouth, (b) What points are to be considered in deciding how deep to make the bird's mouth?

127. Explain and be able to demonstrate how to mark off the tail of a rafter.

128. Explain how to shorten a rafter if a ridge board is used.


Griffith: "Carpentry/'

Townsend: "Carpentry."

WiLftON and Werner: "Roof Framing."

Was this article helpful?

0 0
Woodworking Tools and Installation Tips

Woodworking Tools and Installation Tips

There are a lot of things that either needs to be repaired, or put together when youre a homeowner. If youre a new homeowner, and have just gotten out of apartment style living, you might want to take this list with you to the hardware store. From remolding jobs to putting together furniture you can use these 5 power tools to get your stuff together. Dont forget too that youll need a few extra tools for other jobs around the house.

Get My Free Ebook

Post a comment