A method of installing a fence is provided including advancing a plurality of beams into the ground so that the beams achieve a substantially vertical orientation, and installing a plurality of tubular posts over the beams so that the posts automatically attain the substantially vertical orientation, without having to dispose any other levelling structures between the beams and the posts. One or more horizontal rails can be installed relative to adjacent beams and tubular posts. The tubular posts can define holes, and the opposing ends of a rail can be inserted through corresponding holes. Where the beams have longitudinal channels, the ends of the rails can project through the holes in the posts and into those channels. The tubular posts and/or rails can be secured in place with fasteners. The method provides an inexpensive and quick way to install a fence without digging holes for the beams.