Deck 32: Girders, Sills, and Floor Joists

Question 1

A house requires two solid 2 x 12-inch girders running parallel to each other. The span is 31 feet 6 inches. How many board feet are required?

Answer 1

126

Question 2

Girders are the large beams supporting the first floor of a house.

Answer 2

True

Question 3

The __________ serves as a base on which the ends of the first floor joists rest.

Answer 3

sill

Question 4

A 4 x 6-inch sill is installed on a foundation 20 x 42 feet. A built-up sill 4 x 6 inches is constructed using doubled 2 x 6 inch lumber. How many linear feet of lumber are needed?

Question 5

A sill rests on top of the foundation and is anchored to it by bolts embedded in the top of the foundation.

Question 6

How many columns are required under a 72-foot girder, supported on each end by the foundation, if they are spaced 8 feet on center?

Question 7

How many board feet are required for a sill 4 inches by 8 inches and 24 feet long?

Question 8

A built-up __________ is made of several pieces of lumber nailed together.

Question 9

How many 20-foot lengths of 2 x 6 inches are needed to construct sills for a building 30 feet wide and 150 feet long?

Question 10

How many floor joists are required in a building 26 x 80 feet long if floor joists are spaced 20 inches on center?