Leave a minimum of 2’ 6” from the side walls of the shelter and 3’ from the back wall of the shelter from other structures to allow room for the hydraulic legs to extend to raise and lower the shelter. In-ground anchors are driven 4’ deep into the ground and will not penetrate roots, rocks, boulders, slabs, or other solid material. If you have a soil with large rocks, roots, or a rock shelf, please let us know, and we can prepare a modified concrete anchor.