Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Patio attached to roof using 4x6 joist.
The bigger you make your deck the more you ask of the framing timbers that hold up the deck s structure and the joists and beams that support the.
Recommended beam joist spans for deck framing.
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.
Attach the horizontal beam by using a nail gun.
This new patio cover roof plan replaces the ledger board that you might attach to existing fascia with a 4x6 beam supported by 4x6 posts.
If attaching a patio roof to a ledger beneath the eaves does not allow for enough headroom you can set the new patio roof s rafters on the wall s top plate.
After that to make it flush with the roof of the existing house cut the two outer.
When the 4x6 beam is in place and supported by the 4x6 posts the existing roof does not carry any of the weight of the new patio cover roof.
The smallest beams for patio covers are typically 4 by 6.
In this situation i would use double 2x joist hangers at each end of the joists.
In addition i would add another 2x6 under the existing 2x6 and use adhesive to sister onto the 2x12 but also under the existing 2x6.
I would keep the tops of each joist flush.
Free standing patio cover plans.
Make a cutting on one of the sides of the horizontal roof beam on an angle.
For more information see our disclosures here.
Use construction adhesive and nail as you would any normal double joist or header etc.
This post may contain affiliate links.
Patio roof maximum beam rafter spans.
You have to do it thoroughly so that the rafters sit flush on it.
On a two story house you can usually tie the ledger into a band joist also called a rim joist located between the floors as shown below.