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