Porch Roof Beam Span

Build your patio cover or deck designing with roof rafter span tables board can span 16 ft for a wall pergola patio roof maximum beam rafter spanspatio roof beam calculatorpatio coversplease plete.

Porch roof beam span. An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. Window door garage door headers supporting roof loads only. For the initial calculation f can be estimated at 1 000. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.

The total load is 4 000 pounds. I have a porch roof attached to the rear of my home size is approximately 6 x24. F stands for the beam s fiber strength in bending which depends on the species of wood. For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine.

This post may contain affiliate links. One side is attached to the exterior wall of the home and the other side is supported by five 6 x 6 treated posts. For more information see our disclosures here. Patio roof maximum beam rafter spans.

Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. Wood beam calculator american wood council website rafter and joist span faq. L stands for the span of the beam in feet. In other words it is either going to be on an outside wall or somewhere on the inside.

The smallest beams for patio covers are typically 4 by 6. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. The lengths and sizes of joists vary depending on the species and quality of the lumber used. The load on an outside wall with clear span trusses is exactly half the load on each wall.

A 4 by 10 can usually span up to 12 feet between posts. Can i create my own beam by nailing a treated 2x10 on either side of the posts to carry the load and then remove the three middle posts. Fill in the parts of the formula that are already known.