Table of Contents
What is the difference between hip rafters and cripple jack rafters?
HIP RAFTER: A rafter that runs diagonally from the top of the wall plate to the roof ridge, so as to form an outside corner of the roof (see Figures 1, 8, 9 and 10). CRIPPLE JACK RAFTER: A rafter that runs from a hip rafter to a valley rafter, perpendicular to the roof ridge (see Figures 1 and 8).
What is the purpose of a Jack rafter?
a rafter having less than the full length of the roof slope, as one meeting a hip or a valley.
What is a hip Jack?
A jack rafter, one end of which terminates at the hip of a roof.
What are hip rafters?
: the rafter extending from the wall plate to the ridge and forming the angle of a hip roof.
What type of roof calls for both hip and valley rafters?
A hip rafter is called for only when framing a hip roof, but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect.
What is a California Jack framing?
When one roof is framed on top of another, already existing roof, this type of roof framing is sometimes called “California” roof framing. Sometimes I sheath the existing roof before framing the California roof and also add a “flat valley board”, ( usally a 2″ x 12″ ) to nail the California jack rafters to.
What is the advantage of a hip roof?
Pros: Hip roofs are more stable than gable roofs. The inward slope of all four sides is what makes it sturdier and more durable. Hip roofs are excellent for both high wind and snowy areas. The slant of the roof allows snow to easily slide off with no standing water.
Are hip roofs always 45 degrees?
Hip rafters are nailed at a 45 degree angle to the ridge board down to the four outside corners of the building. Also used to nail the top of the jack rafters. Jack rafters are nailed to the hip and slope down to the exterior walls. They have the same seat and tail cut as a common.
Are hip and valley rafters the same?
Relative to the main rafters however, the hip and valley rafters rise at an angle up the incline of the roof. Their rise in inches is exactly same but the horizontal distance to get to that point is longer….Is the pitch of a hip and valley the same as a main rafter?
| Rafter Pitch | Hip/Valley Pitch |
|---|---|
| 4.0 / 12 | 2.8 / 12 |
| 4.5 / 12 | 3.2 / 12 |
| 5.0 / 12 | 3.5 / 12 |
| 5.5 / 12 | 3.9 / 12 |
How many Jack rafters are needed for a hip roof?
The 7:12-pitch hip roof is framed with 2×6 common and jack rafters on 16-inch centers and with 2×8 hips and ridge. At the birdsmouth, I supplied the 3 ½-inch seat and for the rafter tail, a 12-inch overhang with a 2 ½-inch-high subfascia (plumb cut), which dictated the level cut at the heel.
What is a jack stud in framing?
Timber wall framing A jack stud is a stud that has been cut down to be placed above and/or below an opening. The jack stud provides support to the lintel trimmer and sill trimmer.