Roof Framing Terms Diagram

Some of these can support the roof and prevent ridge sagging and wall spreading.

Roof framing terms diagram.

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. 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. 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.

This roof framing diagram illustrates how a hip roof is built. Houses have gable hipped mansard gambrel flat and shed roofs. 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. Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more.

There are many types of roof trusses as wall as many types of roofs more types than there are parts. 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. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Roof framing involves a lexicon all its own.

Details for conventional wood frame construction. Figure 2 2 roof framing terms. The roof truss structure and design is integral to roof structural integrity and shape. 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.

The angle of the roof slope measured as x inches per 12 x 12. Collar ties rafter ties tension beams structural ridge beams. Many homes combine roof types on one roof. 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 first approach to achieving a strong durable struc. When repairing or replacing a roof it pays to be familiar with these terms. 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. Line length is the hyptenuse of the triangle whose base equals the total run and whose altitude equals the total rise.

This roof has horizontal battens for tile or metal. Roof framing rafter layout. Where number of nails is designated as or resulted to more than 15 connection shall be evaluated by a design professional. American forest paper association wood construction data 1.

Roof pitches commonly range from 4 12 to 8 12.