Typical post footings for fences decks and exterior stairs are between 18.
Fence post concrete footing.
Concrete post footings are removed when replacing a damaged post moving posts or when trenching for underground pipes.
Fence stability starts at the bottom.
Fence posts anchored in concrete footings last for years as long as they re installed properly.
After digging a hole in the correct dimensions for the support slide the form tube into the hole and fill it with concrete making sure the concrete mix is properly consolidated to eliminate air pockets and other defects.
For example an 1800mm fence in wind zone a will require footings of a minimum of 600mm deep by 200mm wide whereas the footing dimensions for the same fence in wind zone d will need to be at least 700 1100mm deep by250mm wide.
Form tubes make it easy to pour concrete support footings for mailboxes fence posts decks and other structures.
Recommended steel fence post foundation details h height of fence above grade s spacing of fence posts center to center b diameter of round concrete pier hole or dimension of square pier d required depth of concrete pier.
To prevent a post from decaying too quickly as well as to make it easy to remove when it does start.