House Step Down Roof Framing

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

House step down roof framing.

Start by marking the plumb line the horizontal line that marks where the wall will meet the rafter. Measure your seat cuts. The provisions for prescriptive roof construction are found in chapter 8 of the irc and in section 2308 of the ibc. Additionally framing will start laying the tracks for the flooring roof doors and windows.

The run or half the building span is the base of the triangle. The rise or height of the roof at its peak is the altitude of the triangle. This and following chapters describe roof framing using con. Framing refers to the timber wall skeletons and outlines built by a carpenter.

In most cases the walls have also been sheathed to increase their strength and stiffness. This is known as prescriptive framing. 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. If foundations and footings are the horizontal guide plan for the house then frames are the major help in building the vertical.

With premanufactured trusses or with rafters and ceiling joists commonly called stick framing. And the line length measurement from the roof peak to the building wall is the hypotenuse. You should be able. Line up the square with the plumb line then rotate it 180 degrees realigning the square on the other side of the.

Roof framing begins after the house walls have been framed.