Roof Framing Terms Diagram

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

Roof framing terms diagram.

Many homes combine roof types on one roof. Collar ties rafter ties tension beams structural ridge beams. When repairing or replacing a roof it pays to be familiar with these terms. This roof has horizontal battens for tile or metal.

Here is a closer look at common roofing terms. The roof truss structure and design is integral to roof structural integrity and shape. Roof framing rafter layout. Roof pitches commonly range from 4 12 to 8 12.

The angle of the roof slope measured as x inches per 12 x 12. 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. Line length is the hyptenuse of the triangle whose base equals the total run and whose altitude equals the total rise. Figure 2 2 roof framing 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. Details for conventional wood frame construction. 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.

Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more. Roof framing involves a lexicon all its own. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. Some of these can support the roof and prevent ridge sagging and wall spreading.

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. Drive through nearly any neighborhood and you can see that roofs have many different shapes. 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. American forest paper association wood construction data 1.

It is a waterproofing layer made of regular felt stacked above the solid. Houses have gable hipped mansard gambrel flat and shed roofs. This article and series of illustrated diagrams shows you all the parts of a basic roof truss king truss and queen truss. 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.

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.