My footings for a brick built garage, same dimensions are 750mm deep with 500mm of concrete with one row of blocks bringing them back up to ground level.. A concrete shed base is the strongest type of shed foundation. it is at the heavier end of the work you will do to build your shed. this article will help you to decide if you really need such a heavy duty solution or if something a bit lighter and simpler to install would work just as well.. Building a gravel shed foundation does involve a fair amount of hard work. but, the most important thing you need to keep in mind, is that whether you build a framed in foundation or a free-form one, it has to be as close to perfectly level as possible before you put your shed on it..
Last week i had the opportunity to help a friend build the foundation for a new shed that will be delivered in a couple of weeks. his back yard has a bit of a slope, and it would take too much concrete to pour a slab (read how to pour a concrete shed foundation here).. Design the foundation to fit the building conditions. start any type of foundation by digging footings, at least 2 feet wide and as deep as the frost line; some foundations will require extra width, some up to 6 feet wide. match the foundation to the size of the building.. A suitably-qualified engineer should be consulted to determine the type and depth of foundations required for a particular situation. very broadly, foundations can be categorised as shallow foundations or deep foundations..
