An inground Flagpole refers to a flagpole which is rooted in the ground. It is a permanent flagpole, which can withstand winds of up to 130 MPH. This will depend on the flagpole’s materials and height. Flagpoles planted in ground need to be supported by roots, just like this site link.
You will need to dig a pit, then moisten the soil, and finally pour concrete. After the concrete has cooled, a groundsleeve, or a cylindrical covering, is placed into it. A groundsleeve, a thick tube of steel with an open end and a large base, is made from thick steel. It protects flagpoles from concrete’s corrosive agents. The groundsleeve’s ends are held in place by steel plates. Steel wedges secure the flagpole to the groundleeve’s base. Groundsleeves come with a ground spike for capturing lightning. This may not be an issue if your aluminum flagpole is nearby.
An optional flash collar can be attached to the foundation. It fits over your pole and ground sleeves. The collar and pole space are sealed to keep rainwater out of the base and foundation.
When building your foundation, you must make sure the flagpole doesn’t get knocked over. 10% should be underground as a rule.
Some larger flagpoles require professional installation. Ask your distributor or manufacturer whether they would be willing to install it.