Metal posts serve many purposes. They can be used for fences, clothes lines, netball hoops and more. Concrete around a metal post in a post hole prevents it from moving or tipping when the soil shifts during annual freeze-thaw cycles and heavy rains that can loosen the soil around the post.
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Things you need
- Post hole digger
- Metal post
- Rust inhibitor
- Concrete mix
Dig the hole approximately 90 cm (3 feet) across and at least 60 cm (2 feet) deep.
Use the post hole digger to loosen and remove soil, and use a shovel to remove all loose soil and straighten the edges of the hole.
Spray the post with rust inhibitor around and inside the area that will be underground.
Place the metal post in the hole. Measure the amount above the soil line to be sure the amount above the soil line is appropriate for your project. If the post needs to be shorter, dig out more soil. If the post needs to be higher, add soil to the bottom of the post hole.
Pour 15 cm (6 inches) of gravel around the metal post.
Mix the concrete in a wheelbarrow according to the directions on the package. Use a shovel to mix the concrete thoroughly.
Shovel the concrete into the hole around the post until it is almost level with the soil line. Create a cone shape sloping away from the post so water drains off the concrete and does not pool around the post.
Hold or brace the post in position for about 15 minutes until the concrete has started to set up.
Tips and warnings
- Hold or brace the post in position for about 15 minutes until the concrete has started to set up.
- Follow all precautions on the packages for the rust inhibitor and concrete mix.
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