How to Anchor an Aluminum Fence Post Into Concrete

Dig a hole with your shovel to accommodate the post. The width of the hole, according to fence retailer Aluminum Fence Specialists, depends on the size of the post. The website suggests digging a hole three times the size of the pipe's diameter. The depth of the hole is dictated by your region's frost line and the weight of the fence. To prevent post upheaval due to the contraction and expansion of temperature change, dig at least 42 inches deep.

Calculate how much concrete you will need. Determine how many posts you will use and multiply it by the volume of each hole. Take the radius of the hole and multiply it by itself. Multiply that number by pi (3.14) and by the depth of the hole to determine the overall volume. Multiply the volume by the number of holes to determine how many cubic feet of mixed concrete you need. According to the concrete calculator at ConcreteNetwork.com, it takes two 80-pound bags of pre-mix concrete to produce one cubic foot.

Mix the concrete with water in your wheelbarrow according to the manufacturer's instructions. Fill the post hole halfway with concrete. Set the post into the hole and straighten it. Top the hole off with concrete, and correct any movement of the post. Allow it to dry, checking periodically to correct any fence post movement. Repeat this process with each of the remaining posts.