Roof Framing Terms Diagram

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 terms diagram.

This roof framing diagram illustrates how a hip roof is built. Some of these can support the roof and prevent ridge sagging and wall spreading. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. Many homes combine roof types on one roof.

The angle of the roof slope measured as x inches per 12 x 12. 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. 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. This article and series of illustrated diagrams shows you all the parts of a basic roof truss king truss and queen truss.

American forest paper association wood construction data 1. Roof framing involves a lexicon all its own. Figure 2 2 roof framing terms. Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more.

Drive through nearly any neighborhood and you can see that roofs have many different shapes. 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. Line length is the hyptenuse of the triangle whose base equals the total run and whose altitude equals the total rise. Roof framing rafter layout.

Roof pitches commonly range from 4 12 to 8 12. This roof has horizontal battens for tile or metal. It is a waterproofing layer made of regular felt stacked above the solid. When repairing or replacing a roof it pays to be familiar with these terms.

The first approach to achieving a strong durable struc. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. 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. Where number of nails is designated as or resulted to more than 15 connection shall be evaluated by a design professional.

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. Houses have gable hipped mansard gambrel flat and shed roofs. Collar ties rafter ties tension beams structural ridge beams. There are many types of roof trusses as wall as many types of roofs more types than there are parts.

Here is a closer look at common roofing terms.