Victor C6000 Instruction Manual page 37

Rafters: Rafters are inclined roof support members. Rafters inculde the following types:
• Common Rafter: The Common connects the plate to the ridge and is perpendicular to the ridge.
• Hip Rafter: The Hip rafter extends from the corner of two wall plates to the ridge or King rafter at
an angle other than 90˚. The Hip rafter is an external angle of two planes.
• Valley Rafter: The valley rafter extends from the corner of two wall plates to the ridge or King rafter
at an angle other than 90˚. The Valley rafter is an internal angle of two planes.
• Jack Rafters: Rafters that connect the Hip or Valley rafter to the wall plate.
• Irregular Hip/Valley Jacks: Jack rafters found in dual pitch or "Irregular" roofs.
Regular Roof: A standard roof where the Hips and/or Valleys run at 45˚ and have the same pitch/
slope on both sides of the Hip and/or Valley.
Irregular Roof: A non-standard roof where the Hips and/or Valleys bisect two different pitches/slopes,
or have "skewed wings" or irregular Jacks.
Rake Wall: A gable end wall that follows the pitch/slope of a roof.
Level
Plumb
Plumb: Vertical Cut. The angle of cut from the edge of the board that allows the rafter to mate on the
vertical side of the ridge rafter.
Level: Horizontal Cut. The angle of cut from the edge of the board that allows the rafter to seat flat on
the wall plate.
Cheek: Side Cut(s). The angle to cut from the SIDE of the Jack rafter to match up against the Hip or
Valley rafter, usually made by tilting the blade from 90˚. Jack rafters typically have one Cheek cut. If
there is only one pitch (no irregular pitch), the angle will be 45˚. If there are two pitches, each side will
have a different Cheek cut for the Jack rafter and angles will total 90˚.
Incremental Adjustment: The difference in rafter length from one rafter to the next.
Top Plate
Page 33
90˚
Ridge
Plumb