Roof Framing Terms Diagram

Houses have gable hipped mansard gambrel flat and shed roofs.

Roof framing terms diagram.

It is a waterproofing layer made of regular felt stacked above the solid. The angle of the roof slope measured as x inches per 12 x 12. This roof has horizontal battens for tile or metal. American forest paper association wood construction data 1.

Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more. 20 psf dead load roof live or snow load snow load 20 psf 30 psf 50 psf 70 psf roof span feet rafter slope rafter spacing. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. This roof framing diagram illustrates how a hip roof is built.

From one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it measure down y height from the long point of the rafter cut and make a mark. Roof pitches commonly range from 4 12 to 8 12. To calculate a roof s pitch place a carpenter s level positioned level on roof line measure out 12 on the level from that 12 point measure down to the roof line. A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework.

Roof framing rafter layout. Details for conventional wood frame construction. The first approach to achieving a strong durable struc. When repairing or replacing a roof it pays to be familiar with these terms.

Line length is the hyptenuse of the triangle whose base equals the total run and whose altitude equals the total rise. Drive through nearly any neighborhood and you can see that roofs have many different shapes. Here is a closer look at common roofing terms. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches.

Collar ties rafter ties tension beams structural ridge beams. Some of these can support the roof and prevent ridge sagging and wall spreading. There are many types of roof trusses as wall as many types of roofs more types than there are parts. If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12.

A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. This will the first point of the rafter measurement line using the results of your rafter length calculation measure from this point along the rafter measurement. The roof truss structure and design is integral to roof structural integrity and shape. Roof framing involves a lexicon all its own.

Where number of nails is designated as or resulted to more than 15 connection shall be evaluated by a design professional.