Deck Post Footings Depth

These requirements will include minimum diameter and minimum depth of the footings.

Deck post footings depth.

Remember to follow local code for deck posts. The evolution compression post base will make any deck footing look fantastic because the connection mechanism is completely hidden deep inside the post. Learn everything you need to know about installing concrete footings to support your deck. Hey kevin that has a lot to do with where you live because the most important factor involved is the frost line in moderate to cold climates frost will penetrate into the ground when air.

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. For details on creating a post layout see how to build a deck. You do not have to use fasteners however if the post itself is buried to a depth of at least 12 inches. I m building a detached deck in my backyard and want to pour concrete footings for the posts to stand on.

One way is to pour concrete in the post hole set the post on the concrete and backfill with gravel. Water pipes should always be set below a frost line to prevent them from freezing in the winter. 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. It s important to know the frost line depth for construction purposes.

Check out our deck footing frost map to help you understand how deep your footings will need to be excavated. We will teach you how to determine the code compliant size of your footings based on the soil type and tributary loads. In frigid minnesota the frost depth is 42 in whereas a warmer state like missouri may have a frost depth of only 1 ft. Posts must be attached to the footings with appropriate fasteners to prevent lateral movement as well as uplift.

Exceptional beauty and high performance all in one compact connector. Kevin h greenville sc. Decks and other permanent structures require deck supports and footings made from structural strength concrete mix. For example the size of the deck plus whether it has a roof will change the depth of the footing.

If you set the posts on top of concrete footings even precast ones you must secure them with positive hardware connections. 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. 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. Also the soil type will alter the width of the deck footing.

There are several methods for setting posts. The depth you are required to set your frost footings will vary from region to region across the country. You ll need the post layout marked before you begin.