Roof Framing Labeling

The point at which all the rafters are attached to.

Roof framing labeling.

This is known as prescriptive. And the line length measurement from the roof peak to the building wall is the hypotenuse. 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. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Label and identify the parts of a roof framing plan. 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. Parts of a roof a ridge board is a horizontal member of the roof frame. The run or half the building span is the base of 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. The rise or height of the roof at its peak is the altitude of the triangle. Transfers the load of the roof through the raftersto walls below. Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing.

Figure 2 2 roof framing terms. 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. Parts of a roof the main structural parts of a roof are ceiling joists ridge board jack rafter hip rafter common rafters creeper rafters raking plates out riggers and noggings or last rafter overhang. 1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches.

Standard stick framing or the newer truss framing. Line length is the hyptenuse of the triangle whose. Roof framing can be simple or complex depending on the roof. Overhangs hips and dormers add greatly to the complexity of the framing.