Girdered Roof Deck

Recommended beam joist spans for deck framing.

Girdered roof deck. You have to do it thoroughly so that the rafters sit flush on it. Height of deck against door threshold. The bigger you make your deck the more you ask of the framing timbers that hold up the deck s structure and the joists and beams that support the. Attach the horizontal beam by using a nail gun.

As a result most decks have inadequate footings to support a new porch roof. The deck roof of today isn t the drab concoction so many of us remember. A girder cantilevered or drop beam is a structural member positioned below the joists to support the weight of the frame. A timber framed patio roof is perfect for your rustic or country home.

Cantilevered beams are stronger than flush style beams because they rely on the strength properties of the wood rather than the individual mechanical and fastener connections. Many porches use 22 diameter corner and intermediate. Have no fear though. Apr 28 20 11 17 am.

Total height of low level ground level deck. Sep 04 19 11 12 am. The roofing material is more traditional such as shingles. My plan was to pour concrete footings then run doubled up 2x8 beams setting on the footings.

After that to make it flush with the roof of the existing house cut the two outer rafters. Where local building codes allow this practice you can bolt a patio overhead s posts directly to existing deck beams joists or other heavy structural members. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. If the roof is attached to the deck it needs to be able to support the weight.

Or you can lag screw through post bases and decking into the top of a deck joist or beam. These traditionally styled roofs are made of wood and feature large supportive beams. Building on an existing deck. These patio covers tend to look like an extension of the home s main structure.

Decks typically are designed to support 55 pounds per square feet or psf of weight. The footings for porch decks must be larger than deck footings. Porch decks require 25 additional psf for roof loads for a total of 80 psf. If the deck doubles as a porch it needs to be able to support no more than 80 psf.

Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Typical decks are designed to support 55 psf lbs per square foot. For those who desire a bit more shade and privacy while soaking up the rays however a deck roof may be in order. Porch decks also require larger footings than deck footings.