Roof Deck Framing Details

Cdx plywood glued and screwed to the framing.

Roof deck framing details.

The roof sheathing is 3 4 in. Download free high quality cad drawings blocks and details of roof and deck insulation organized by masterformat. When using purlins fabral recommends a maximum spacing of 24 on center note that 5v requires solid decking. Kiln dried softwood is recommended for purlins or decking pine fir hemlock and spruce.

Fiber roof underlayment as a final substrate. They are merely placed on top of another structure. These decks are often referred to as floating as they are not secured in place as a stand alone structure. Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters.

Add the length of the overhang beyond this mark and. 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. Rafters should be attached to the header beam using hurricane ties. 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.

First you must make sure the roof is strong enough to support 55 lbs per square foot. Building a deck over a flat roof is very similar to building a deck over a concrete patio. 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. Post and railing construction for rooftop decks.

Details for conventional wood frame construction. The first approach to achieving a strong durable struc ture involving economical use of materials is to follow a basic modular plan for layout and attachment of framing members. Position the square at the end of the rafter board with the tongue on your left and facing away from you. 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.

Pullout values decrease if the fasteners protrude completely through the purlins. Our new smooth series cellular deck offers a blemish free beam to pan rivet. The roof deck should be properly flashed with a.