In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
Roof ledger size.
It is always better to have a large rafter rather than be concerned with a sagging roof.
This is something that greatly depends on size of the structure you are planning on constructing span and specie of the lumber used.
You have not provided enough information to size the ledger safely.
Related lumber wood engineering data.
If your local building authority has a rafter spacing code you may not space rafters wider than required by code.
Plus you need to double fasteners at ledger butts and ends.
Max gap between ledger and wall sheathing is in so no you can t use the in.
Down from top and up from bottom of ledger and staggered up down.
Rafter spacing rafters must be strong enough to hold the roof sheathing and the shingles.
Diameter galvanized lag screws above because pre drilled holes aren t required.
Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches.
Rough lumber cannot be less than than 1 8 3 2mm thicker or wider than the nominal finished thickness or width except that 20 of a shipment cannot be less than 2 32 2 4mm thicker or wider.
Maximum rafter spans for a patio roof.
For instance the international residential code which differs by state and locality indicates in section 502 6 2 of its new jersey code that joists framing into the side of a wood girder shall be supported by approved framing anchors or on ledger strips not less than nominal 2 inches by 2 inches.
The ledger should be attached before the foundation is built for a deck patio roof posts and other structure.
In this application the limiting factor in the connection is the wood ledger and band joist.
It depends on the size of the deck the required live loads form snow etc in your area and the type of wall and attachment.
I would suggest using this awc calculator in order to determine size of the rafters needed.
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.
If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.
The ledger typically a 2 by 6 is usually designed to hold one end of the patio roof rafters.
Rafters should be attached to the ledger boards with sloped joist hangers and to the beam using type h ties.
Structural deck ledger screws left are easier to install than 1 2 in.
For heavy roofs or in.
Parts of a house attached patio roof.
Locating and mounting the ledger is normally a fairly easy process.
