Deck Post Footings Depth

Decks and other permanent structures require deck supports and footings made from structural strength concrete mix.

Deck post footings depth.

The frost depth varies by region. Also the soil type will alter the width of the deck footing. We will teach you how to determine the code compliant size of your footings based on the soil type and tributary loads. Learn everything you need to know about installing concrete footings to support your deck.

Kevin h greenville sc. For example say a deck footing is required to be 450mm diameter in stiff soil the footing will likely be increased to 600mm in diameter with soft soils. You ll need the post layout marked before you begin. In frigid minnesota the frost depth is 42 in whereas a warmer state like missouri may have a frost depth of only 1 ft.

When you contact your local building department to get your building permit ask what the frost depth requirement is and the required size and shape of the footings. One way is to pour concrete in the post hole set the post on the concrete and backfill with gravel. If you live in a warm climate like south florida where frost rarely ever occurs you may be allowed to place your footings on grade but in very cold regions like minnesota and canada you will need to dig down 48 or more. The depth you are required to set your frost footings will vary from region to region across the country.

Remember to follow local code for deck posts. Posts must be attached to the footings with appropriate fasteners to prevent lateral movement as well as uplift. The evolution compression post base will make any deck footing look fantastic because the connection mechanism is completely hidden deep inside the post. There are several methods for setting posts.

It s also important that the footings for a building or a deck be well below the frost line so the posts don t shift as the ground freezes and thaws. You do not have to use fasteners however if the post itself is buried to a depth of at least 12 inches. It s important to know the frost line depth for construction purposes. Exceptional beauty and high performance all in one compact connector.

How deep do i need to dig before i can pour. If you set the posts on top of concrete footings even precast ones you must secure them with positive hardware connections. Water pipes should always be set below a frost line to prevent them from freezing in the winter. For details on creating a post layout see how to build a deck.

It is important to check local building codes for construction requirements in your area. Check out our deck footing frost map to help you understand how deep your footings will need to be excavated. For example the size of the deck plus whether it has a roof will change the depth of the footing.