This beam is known as purlin.
Gazebo roof purlin.
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The purlin notches slip over the double header boards to give the piece strength and beauty.
Beginning at the outside edge of your roof place each panel directly onto the purlins that are attached to the roof trusses.
This support is usually a beam which is protected under the rafters at a point between the ridge and the wall plate.
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Typically a gazebo has a conical eight sided shaped roof.
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.
This will create a stop that you can slide your roof panels down to resulting in a perfect 1 1 2 in.
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To install corrugated roofing start by cutting your panels to length with an angle grinder.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
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It creates a solid piece that won t curve warp or bend.
Next we screw them down into the purlins with 3 screws.
In a shade structure the overall architectural design and the roof style is usually what determines whether a shade structure is called a gazebo pergola or pavilion.
Maximum rafter spans for a patio roof.
Finally for the top stringer boards we use 2 x 4 lumber and lay it flat on top of the purlins.
There is a seemingly endless array of roof designs options for creating beautiful architectural shade creations.
Next pre drill holes on the end and side ridges of the panels spacing the holes 6 to 8 inches apart.
Work with patience and with great care to get the job done in a professional manner.
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Fasten another 2 4 to the first except hold it up an inch photo 12.
If the rafters are longer than 7 we recommend you to install 2 6 purlins.
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Continue installing the rest of the rafters as in the image.
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Attach a scrap 2 4 with a couple screws to the outside edge of the bottom purlin.