Usually land directly on a tie beam.
Roof rafter terminology.
Rafters are inclined members spaced from 16 to 48 inches apart.
When repairing or replacing a roof it pays to be familiar with these terms.
In most cases in this manual tails are added later.
Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more.
Rafters which rest on the outside walls at the bottom and connect to the ridge at the top are called common rafters highlighted here in yellow.
Rafter the members making up the main body of the framework of all roofs are called rafters.
Definition of valley rafter or cripple jack rafter.
Here is a closer look at common roofing terms.
Roof dead load the approximate weight of roofing materials.
In the sketch above the valley rafter is drawn in yellow.
Definitions of rafter span run roof span slope collar ties.
Common rafter terminology.
Ridge the horizontal line at the top of a pitched roof applies whether there is a sloping roof on both sides a duo ridge or if there is just one a mono ridge.
Hip rafter horizontal run 16 97 valley rafter ridge intersect.
Eave span length the horizontal length i e.
Roof live load see snow or non snow.
Length in plan of the overhang portion of the rafter.
Tlor total length of rafter this is the total length from center of ridge to the facial cut.
A rafter extending from the roof ridge down to the top plate of a wall at the intersection of a gable extension roof that itself abuts or intersects with the main roof.
They do for the roof what the joists do for the floor and what the studs do for the wall.
Rafter a vertical sloping timber used to form the shape of the roof the side of a truss.
Application of calculations rafter lengths calculated mathematically.
Rafters on opposite sides of the ridge should be installed directly opposite each other in pairs although if you see a few that don t align it s really not a defect.
Auxiliary cushon compound.
They vary in size depending on their length and spacing.
Ll line length also called lor.
Principal rafter major rafter rarely a chief rafter.
Being smaller than a principal rafter.
A principal common rafter roof or double roof.
Length in plan of the rafter from a structural beam or wall to another structural beam or wall.
Common rafter minor rafter.
A bearing timber forming part of a suspended timber floor to which the floor boards are nailed to the top and a ceiling may be attached beneath or.
A term used to describe a pitched roof the ends of which are also sloped.
Roof framing involves a lexicon all its own.
These are short spars that run from a hip to the eves or from a ridge to a valley.
Bct 122 roof framing 1 rafter terminology calculations.
