Roof Framing Labeling

The run or half the building span is the base of the triangle.

Roof framing labeling.

Roof framing can be simple or complex depending on the roof. And the line length measurement from the roof peak to the building wall is the hypotenuse. This is known as prescriptive. Introduction to prescriptive roof framing 3 prescriptive roof construction the international residential code irc and the international building code ibc set out specific guidelines within which conventional light frame wood structures may be built without the need for engineering analysis of each component.

The rise or height of the roof at its peak is the altitude of the triangle. Label and identify the parts of a roof framing plan. 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. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

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. Parts of a roof a ridge board is a horizontal member of the roof frame. Roof framing rafter layout. Transfers the load of the roof through the raftersto walls below.

Figure 2 2 roof framing terms. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. Nearly all roofs are framed using one of two methods. Overhangs hips and dormers add greatly to the complexity of the framing.

Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing. The point at which all the rafters are attached to. 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.