Rafter spacing rafters must be strong enough to hold the roof sheathing and the shingles.
Roof ledger size.
If your local building authority has a rafter spacing code you may not space rafters wider than required by code.
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.
Max gap between ledger and wall sheathing is in so no you can t use the in.
Bolts and screws must be located 2 in.
Structural wood lumber engineering properties 5 and larger.
Rafters should be attached to the ledger boards with sloped joist hangers and to the beam using type h ties.
Plus you need to double fasteners at ledger butts and ends.
For heavy roofs or in.
This is something that greatly depends on size of the structure you are planning on constructing span and specie of the lumber used.
Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches.
The ledger typically a 2 by 6 is usually designed to hold one end of the patio roof rafters.
Related lumber wood engineering data.
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.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
The ledger should be attached before the foundation is built for a deck patio roof posts and other structure.
Bolt with spacer option over the siding unless it s t 1 11.
Parts of a house attached patio 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.
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.
Locating and mounting the ledger is normally a fairly easy process.
Diameter galvanized lag screws above because pre drilled holes aren t required.
You have not provided enough information to size the ledger safely.
Maximum rafter spans for a patio roof.
If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.
Down from top and up from bottom of ledger and staggered up down.
