Framing Angled Attic

Run the plywood down to the top of the knee wall.

Framing angled attic.

The run or half the building span is the base of the triangle. Collar ties are horizontal members that like rafter ties extend from rafter to rafter but. Eliminate guesswork make a full size drawing of the gable wall on the floor of your garage or attic. The tangent of 22 5 41421 laying out an octagon using a framing square we would take 12 on the blade and the number to be taken on the tongue is 12 41421 which is 4 97.

The rise or height of the roof at its peak is the altitude of the triangle. Use screws to attach sheets of birch plywood to the angled ceiling over the insulation making sure to drive the screws into the ceiling joists. And the line length measurement from the roof peak to the building wall is the hypotenuse. If you want your attic space to have a flat ceiling you ll need to add collar ties to the framing.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Then add the 2 4 side walls and the roof slope using a square. The polygon roof miter angle is the tangent of the polygon central angle divided by two. The easiest method of framing a wall is to build it on the floor and erect it ensuring it s plumb straight up and down before securing.

However the wall must be built 1 4 inch shorter than. The central angle for an octagon roof is 45. Use the 3 4 5 triangle method to make the 90 degree angle.