Flat Porch Roof 2x6 Rafters

Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

Flat porch roof 2x6 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. Douglas fir maximum horizontal roof rafter span for lumber grade selected structural and no. It is always better to have a large rafter rather than be concerned with a sagging roof. 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.

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 won t experience heavy snow loads a gable roof can span up to 22 with 2 4 rafters. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. 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.

For roofs that will experience heavy snow or wind and will span the same distance use 2 6 rafters. Dead load weight of structure and fixed loads 15 lbs ft 2. Just enter the dimensions of the roof rise and run to get started. We show you how both a typical rafter style porch and truss roof area constructed.

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. 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. Will i be able to span a concrete slab of 11 6. Building a porch roof requires basic carpentry and porch roof framing knowledge.

If i tie into a 6 12 pitch roof with 2x6 s. This allows the panels to be securely attached to the rafters for maximum stability. 1 ft 0 3048 m. If you have.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. 2 are indicated below. We show you the steps involved and calculations required for buildng a roof for your porch or constructing one over your deck or patio. 1 psf lb f ft 2 47 88 n m 2.