roof framing plan

Question 1

Most common, built with
“common” rafters

Answer 1

• Gable

Question 2

Provides overhang on all four sides

Answer 2

Hip

Question 3

Provides more space on
second floor

Answer 3

Gambrel

Question 4

Combination of Hip and
Gambrel

Answer 4

Mansard

Question 5

Frequently used to attach one
structure to another

Answer 5

Shed

Question 6

Runs
from top plate to
ridgeboard of a gable
roof

Answer 6

Common rafter

Question 7

Runs from
corner of top plates to
ridgeboard on a hip roof

Answer 7

Hip rafter

Question 8

any rafter
which does not run the
full length from plate to
ridge ( e.g. – Hip jack,
Valley jack)

Answer 8

Jack rafter

Question 9

Measurement from
outside of wall to outside of
opposite wall

Answer 9

Span

Question 10

– One half of span (for
symmetric roofs)

Answer 10

Run

Question 11

The total vertical
distance that the roof projects
above the top plate

Answer 11

Rise

Question 12

The rise divided by
the run, always given in terms
of 12” of run (e.g. 3 on 12
written 3/12)

Answer 12

Slope

Question 13

– The rise over the span

Answer 13

Pitch –

Question 14

used frequently for
remodeling, for cathedral
ceilings, for shed roof
additions, for full 2
nd floor
storage, and spans up to
24’

Answer 14

Rafters

Question 15

used in most
new construction, for
spans 24’-60’, and most
commonly for lower
sloped roofs

Answer 15

Trusses

Question 16

The horizontal
distance that the overhang covers

Answer 16

Projection

Question 17

Cuts made to
form the overhang

Answer 17

Rafter tail cuts

Question 18

– Cuts made
*to sit on the top plate

Answer 18

Birdsmouth

Question 18

– Cut made to
*attach to the ridgeboard

Answer 18

Ridge cut