Construction Rafters

The term Span when it relates to rafters is referred as

• the distance from load bearing wall to load bearing wall

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

• the amount of slope the building has

• the total of the distance of the ridge board

The term Run when it relates to rafters is referred as

• the distance from load bearing wall to load bearing wall

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

• the amount of slope the building has

• the total of the distance of the ridge board

The term Slope when it relates to rafters is referred as

• the distance from load bearing wall to load bearing wall

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

• is the ratio of Unit Rise per foot of Unit Run

• the total of the distance of the ridge board

the unit run for a rafter is

• none of the options are true

• the amount a rafter vertically increases per unit of run

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

• the length of a rafter per unit of run

the unit length for a rafter is

• none of the options are true

• the amount a rafter vertically increases per unit of run

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

• the length of a rafter per unit of run

What is the Unit Length of 4:12

• 12.65"

• 12"

• 6.93"

• 8"

What is the Unit Length of 9:12 slope?

• 12"

• 9"

• 10.39"

• 15"

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

• 195"

• 196"

• 390"

• 60"

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

• 170 3/4"

• 170 3/16"

• 340 3/8

• 340 3/4"

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

• adjustment for birdsmouth and ceat cut

• adjustment for the fascia and bearing wall

• adjustment for the ridge and bearing wall

• adjustment for the ridge and fascia board