Flat Porch Roof 2x6 Rafters

My plan is to add 2x6 supports on to the top plates of the existing house wall where the 2x6 s intersect with the walls.

Flat porch roof 2x6 rafters.

Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. 1 ft 0 3048 m. Building a porch roof requires basic carpentry and porch roof framing knowledge. I will be setting 4x4 post every 6 with 2 2x6 s with 1 2 osb sandwiched between them as the form to set on top of post.

For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. If you re building rafters and aren t sure where to start when determining the length of your lumber you re in the right place our rafter stock size calculator shows you how long your rafters should be so you ll know what you need in terms of framing lumber dimensional lumber studs and more. Just enter the dimensions of the roof rise and run to get started.

This allows the panels to be securely attached to the rafters for maximum stability. Dead load weight of structure and fixed loads 15 lbs ft 2. 1 psf lb f ft 2 47 88 n m 2. If you have.

Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. When placing rafters for a tin roof also frequently referred to as corrugated metal or steel it is common to set the distance between rafters based on the size of the roofing panels. It is always better to have a large rafter rather than be concerned with a sagging roof. For roofs that won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters.

Live load is weight of furniture wind snow and more. We show you the steps involved and calculations required for buildng a roof for your porch or constructing one over your deck or patio. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.

You can use either 2 6 or 2 4 rafters for roofs with a 3 12 pitch or greater but it depends on the overall size of your shed. If i tie into a 6 12 pitch roof with 2x6 s. We show you how both a typical rafter style porch and truss roof area constructed. 2 are indicated below.