Construction Rafters

Front

The term Span when it relates to rafters is referred as

Back

the distance from load bearing wall to load bearing wall

Front

The term Run when it relates to rafters is referred as

Back

1/2 the distance from load bearing wall to load bearing wall

Front

The term Slope when it relates to rafters is referred as

Back

is the ratio of Unit Rise per foot of Unit Run

Front

the unit run for a rafter is

Back

the horizontal segment of the rafter (usually based on 12")

Front

the unit length for a rafter is

Back

the length of a rafter per unit of run

Front

What is the Unit Length of 4:12?

Back

12.65"

Front

What is the Unit Length of 9:12 slope?

Back

15"

Front

What is the TRL for a span of 30' and a roof slope of 5:12?

Back

195"

Front

What is the TRL for a building span of 24'6" and a roof slope of 7:12?

Back

170 3/4"

Front

When calculating Actual Rafter Length (ARL) what two adjustments need to be made?

Back

adjustment for the ridge and fascia board