Footings For Deck Roof

If the deck doubles as a porch it needs to be able to support no more than 80 psf.

Footings for deck roof.

How to get a solid frost proof footing. This article discusses strategies for building over an existing slab patio or over a deck and offers links to articles about the specific tasks such as pouring the footings raising posts and so forth. We will teach you how to determine the code compliant size of your footings based on the soil type and tributary loads. Gable end porches will also require an additional footing in the center of the side rim to transfer the truss or rafter loads to the footings because the framing of the roof is perpendicular to the floor framing.

For an upper deck with a landscaped backyard below a belled pier may be the way to go providing for larger bearing areas but without as much concrete in the flowerbeds. Porch decks also require larger footings than deck footings. Many porches use 22 diameter corner and intermediate footings. Then dump concrete through the tube into the bottom of the hole.

Most deck roofs require separate footings from the deck to support the weight of the roof throughout the seasons. The footings for porch decks must be larger than deck footings. When you pour concrete footings hold the cardboard concrete form tube about 12 in. Decks typically are designed to support 55 pounds per square feet or psf of weight.

Start here if you re building a roof over a patio or deck. Do this by nailing the sides of the tube to the center of a tic tac toe grid of 2x4s at the top of the hole. Check out our deck footing frost map to help you understand how deep your footings will need to be excavated.