Roof Ledger Size

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.

Roof ledger size.

Structural wood lumber engineering properties 5 and larger. Diameter galvanized lag screws above because pre drilled holes aren t required. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. It is always better to have a large rafter rather than be concerned with a sagging roof.

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. Bolt with spacer option over the siding unless it s t 1 11. Rafter spacing rafters must be strong enough to hold the roof sheathing and the shingles. Down from top and up from bottom of ledger and staggered up down.

In this application the limiting factor in the connection is the wood ledger and band joist. The ledger should be attached before the foundation is built for a deck patio roof posts and other structure. Max gap between ledger and wall sheathing is in so no you can t use the in. Related lumber wood engineering data.

Rafters should be attached to the ledger boards with sloped joist hangers and to the beam using type h ties. If your local building authority has a rafter spacing code you may not space rafters wider than required by code. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. You have not provided enough information to size the ledger safely.

Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches. Parts of a house attached patio roof. The ledger typically a 2 by 6 is usually designed to hold one end of the patio roof rafters. Bolts and screws must be located 2 in.

Locating and mounting the ledger is normally a fairly easy process. 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. Structural deck ledger screws left are easier to install than 1 2 in. Maximum rafter spans for a patio roof.

This is something that greatly depends on size of the structure you are planning on constructing span and specie of the lumber used. Plus you need to double fasteners at ledger butts and ends.