Porch Hip Roof Framing Details

When building a porch roof with trusses on this type porch the corner and subsequent trusses are built a little differently due to the slope of the roof.

Porch hip roof framing details.

There are also no gables plus the slope of it is normally relatively gentle and also gives a lower appearance. With a square roof the ridge becomes a square center piece kingpost with side lengths equal to common rafter thickness. Joists and collar ties. Hip backing angle 15 4.

It s because all the sides of the roof will slope downward to your house walls. The run or half the building span is the base of the triangle. Outside top plate edge to ridge top edge common 10 11 3 4. Hip roof framing center join diagram with options for square roof 1.

Now outline the biggest rectangle inside the building layout. Now draw the centerlines for all rectangles that are formed inside. Next soffit framing is installed along the roofs edge. The first step in the process of erecting the hip roof is to get the ridge beam into place at the top of the roof.

Hip porch roof framing this style that can be used for framing your porch is a little complex or more difficult to make. If the wall plates are all square of equal lengths then the hipped rafters would form a pyramid shape like the picture above normally a roof is rectangle and there are more yellow common rafters. Details for conventional wood frame construction. The first approach to achieving a strong durable struc.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The function of each component is. Place the 4 6 common rafters in their designated positions along the 2 longest walls and nail them firmly to the wall with a nail gun. Hip and valley roof framing is no so complex as compared to hip roof framing procedures.

Hip rafters are the diagonal rafters that span from the ridge at the top down to the corners of the roof. The rafters carry the applied loads to the exterior walls. All construction shall comply with international residential code 2. All wood to be 2 douglas fir or better.

First of all you need to design the layout of building. Porch depth footing size beam size max beam span rafter size post size 10ft 18 sq x 1 d 4x8 10ft 2x6 24 o c. Rafters act more like the top chord of a roof truss than as a roof joist. Not shown are the hip and valley rafters needed to tie the roof together where the rafters are framed at an angle to each other.

As you can see the truss angles are constructed to maintain the same slope. Attach 4 6 centering rafters and lift the ridge beam into place. American forest paper association wood construction data 1. In a rafter roof all of these components are required to provide a stable roof.

The rise or height of the roof at its peak is the altitude of the triangle.