Concrete deck footings provide the base for a deck or porch structure and should be at least twice the width of the deck posts that they will be supporting. Footings need to be dug below the frost line in your area, so be sure to find what that depth is. Use post hole diggers or a powered auger to make the holes, keeping the hole diameters as small as possible to keep concrete use to a minimum.
. Make the holes wider at the bottom to allow the footing to anchor itself into the ground. Fill each hole with concrete, tamping with a broom handle or a stick as you pour the mix, ensuring no air pockets will form inside the footings and let cure for two days. Here is a good website for more information http://www.decks.com/article15.aspx .
