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Estimate Roof Frame Materials (Continuing Education)

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Estimate Roof Frame Materials

1. 
There is a gable roof that is to be framed with 2x12 SPF framing lumber. The building is 45' long with the rafters spaced at 16" O.C. How many rafters are required for this roof? Round up to the nearest rafter, and be sure to add the rafters required for the rake rafters.
  1. 35
  2. 68
  3. 70
  4. 74
2. 
There is a gable roof that is to be framed with 2x8 Douglas fir framing lumber. The building is 38' long and the rafters are spaced at 24" O.C. How many rafters are required for this roof? Round up to the nearest rafter and be sure to add the rafters required for the rake rafters.
  1. 20
  2. 40
  3. 44
  4. 48
3. 
There is a shed roof that requires rafters to be installed at 16" O.C. The building is 27' wide. How many rafters are required for this shed roof roof? Add the rake rafters required for the overhand.
  1. 20
  2. 22
  3. 24
  4. 26
4. 
A shed roof requires 2 x 8 rafters to span a distance of 12' 2". On one side there is an overhang of 5" required, and the other side an overhang is 16" is required. What length of 2 x 8 do you need to order to ensure the rafters are long enough? You are using dimensional lumber that come in lengths in denominations of 2'.
  1. 12'
  2. 13'
  3. 14'
  4. 16'
5. 
A hip roof has a total area of 1,265 sq ft. How many 4 x 8 sheaths of plywood are required to cover this roof? Add a 15% waste factor and round up to the nearest whole number.
  1. 39
  2. 40
  3. 46
  4. 48
6. 
You have a total roof perimeter of 2,363 ' 4". How many 16' lengths of fascia are required to span the entire perimeter of the roof? Add a 10% waste factor and round to the nearest full piece.
  1. 148
  2. 163
  3. 170
  4. 175
7. 
You need to purchase lengths of fascia for a shed roof that measure 19' x 13'. The fascia can come in lengths of 12',14',16',18' and 20' lengths. How many lengths of each do you require? Use your judgement to choose the most economical for the roof.
  1. 4-12' & 2-14'
  2. 4-20'
  3. 2-20' & 2-14'
  4. 6-14'
8. 
In a 4' x 8' sheath of plywood there is            square feet.
9. 
A roof with an area of 872 sq ft needs to be sheathed with 4 x 8 sheaths of plywood. If you add a 10% waste factor you will require            sheaths of plywood to cover the roof
10. 
A roof rafter needs to span the distance between the top plate and the ridge beam. This distance is 12' 7". The roof rafter needs to extend 18" beyond the top plate. What is the length of rafter material required to build this roof? You will be using dimension lumber
  1. 14'
  2. 15'
  3. 16'
  4. 18'
11. 
You require a ridge beam which is to be made out of a 1 7/8" x 16" LVL. The length of the building it needs to spans is 15'2". You require an overhang of 8". How long of an LVL must be ordered? LVL's can be ordered in denominations of 2'.
  1. 14'
  2. 16'
  3. 18'
  4. 20'
12. 
You are building a gable roof and require the two gable ends to be sheathed with 1/2" plywood. The width of the gables is 13' 2" and the height is 7'3". How many sheaths of plywood are required to cover the two gable ends? Add a 10% waste factor and round up to the nearest whole sheath.
  1. 3
  2. 4
  3. 6
  4. 8
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