Roof Deck Framing Details

These decks are often referred to as floating as they are not secured in place as a stand alone structure.

Roof deck framing details.

The roof sheathing is 3 4 in. Position the square at the end of the rafter board with the tongue on your left and facing away from you. As with other decks guardrails must be a minimum of 36 inches high infill balusters less than 4 inches apart and the whole assembly strong enough to resist a 200 pound horizontal load or 20 pounds per linear foot depending on the local code. The roof deck surface should sloped away from the house a minimum 1 8 inch per foot so the water will drain and not pond the finished walking surface of the roof deck surface should be below the level of the interior floor by at least 1 1 2.

If you are tying the shed roof into an existing roof on the house you will need to remove the shingles and sheathing to expose the roof framing. They are merely placed on top of another structure. Fiber roof underlayment as a final substrate. Download free high quality cad drawings blocks and details of roof and deck insulation organized by masterformat.

Cdx plywood glued and screwed to the framing. Add the length of the overhang beyond this mark and. Wood construction data 1. The roof deck should be properly flashed with a.

Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge. You will need to attach the porch rafters to the house roof rafters and replace the roofing and flashing. Rafters should be attached to the header beam using hurricane ties. To create a smooth surface and to protect the bottom of the rubber roofing from any fasteners or rough edges on the plywood i installed 1 2 in.

Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters. When using purlins fabral recommends a maximum spacing of 24 on center note that 5v requires solid decking. Details for conventional wood frame construction. Building a deck over a flat roof is very similar to building a deck over a concrete patio.

Post and railing construction for rooftop decks. Pullout values decrease if the fasteners protrude completely through the purlins. First you must make sure the roof is strong enough to support 55 lbs per square foot.