In other words the maximum distance it can cover without support from posts.
Patio roof beams.
This patio roof features curtain tracks that are attached on each of the beams.
Maximum rafter spans for a patio roof.
These patio covers tend to look like an extension of the home s main structure.
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.
Divide the total load according to how many supporting beams the roof will have.
However if the spacing is too wide the patio cover s beams will bow under the weight of the joists and roof covering materials.
They allow you to adjust the canvas shade as you please.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
Allowable spans vary according to wood species and the loads.
If there is also a beam in the middle of the roof divide the total load by three.
These traditionally styled roofs are made of wood and feature large supportive beams.
The determining factor of post spacing is the allowable span of your beams.
Beams can be solid lumber or be built from lengths of 2 by lumber nailed together with 1 2 inch pressure treated plywood spacers in between this forms a 3 1 2 inch thick beam that is equal to the width of a 4 by post.
This sizing guide for roof rafters will help determine what you need for your small project.
Timber framed patio roof ideas.
You can draw the canvas back to get natural light or close it so that the patio will be completely covered.
A timber framed patio roof is perfect for your rustic or country home.
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The roofing material is more traditional such as shingles.
If one side of the roof is supported by the house and the other side is supported by the beam divide the total load by two as the beam is only supporting half of the roof.