Girdered Roof Deck

Obviously the time to make this decision is before nailing the deck flooring in place.

Girdered roof deck.

The joists will rest on these two deck girders and the decking in turn will sit atop the joists. Porch decks also require larger footings than deck footings. Have no fear though. This type of steel roof deck is available in prime painted and a galvanized finish.

For those who desire a bit more shade and privacy while soaking up the rays however a deck roof may be in order. How to install deck girder cantilever or drop beams a girder cantilevered or drop beam is a structural member positioned below the joists to support the weight of the frame. Other innovations include n 32 a 32 wide 3 deep roof deck panel and our new smooth series rivet attachment for our portfolio of cellular deck products. Cut pointed spacers from a sheet of 1 2 inch pressure treated plywood the points prevent rainwater from sitting on the plywood and soaking in.

Deck girder flashing tip. In our photo the deck beam and some deck joist top surfaces have been protected by additional flashing. As a result most decks have inadequate footings to support a new porch roof. Recommended beam joist spans for deck framing.

Fasten the spacers points up to two beam lengths with 1 1 4 inch screws. Attach the spacers at 16 inch intervals. This type of steel roof deck has a 6 pitch and is available in a 22 20 or 18 gauge. Keeping water out from between the segments of built up deck beams can substantially increase the life of the structure.

Typical decks are designed to support 55 psf lbs per square foot. If the deck doubles as a porch it needs to be able to support no more than 80 psf. Many porches use 22 diameter corner and intermediate. 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.

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. First to the west coast market our new smooth series rivet attachment offers a. The deck roof of today isn t the drab concoction so many of us remember. Porch decks require 25 additional psf for roof loads for a total of 80 psf.

The footings for porch decks must be larger than deck footings. While metal deck can be produced in any material thickness between 16 and 22 special gauging will make the deck much more difficult to source. As beautiful as they are functional the modern deck roofs are an extension of and not a deterrent from the luxurious deck. Indeed even when the deck is to be adjacent to the house an alternative construction method is to use a second post and girder system rather than tying the deck directly to the house via a header board.