Definitions of rafter span run roof span slope collar ties.
Roof rafter terminology.
These are short spars that run from a hip to the eves or from a ridge to a valley.
The tops of the.
Ll line length also called lor.
Common rafter minor rafter.
Roof framing involves a lexicon all its own.
Definition of valley rafter or cripple jack rafter.
In the sketch above the valley rafter is drawn in yellow.
Hip rafter horizontal run 16 97 valley rafter ridge intersect.
A principal common rafter roof or double roof.
Rafters are inclined members spaced from 16 to 48 inches apart.
Rafter a vertical sloping timber used to form the shape of the roof the side of a truss.
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.
Length in plan of the overhang portion of the rafter.
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.
Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more.
Roof live load see snow or non snow.
Rafter the members making up the main body of the framework of all roofs are called rafters.
Tlor total length of rafter this is the total length from center of ridge to the facial cut.
Application of calculations rafter lengths calculated mathematically.
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.
They vary in size depending on their length and spacing.
When repairing or replacing a roof it pays to be familiar with these terms.
Bct 122 roof framing 1 rafter terminology calculations.
Length in plan of the rafter from a structural beam or wall to another structural beam or wall.
Here is a closer look at common roofing terms.
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.
Principal rafter major rafter rarely a chief rafter.
Roof dead load the approximate weight of roofing materials.
Eave span length the horizontal length i e.
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.
They do for the roof what the joists do for the floor and what the studs do for the wall.
Auxiliary cushon compound.
A term used to describe a pitched roof the ends of which are also sloped.
Interior span length the horizontal length i e.
Lor length of rafter this is the mathematical length from the center of the ridge to the outside of the wall.
Common rafter terminology.
