Concrete Cylinder - The concrete cylinder is one of the products used for foundation underpinning in Texas. Pre-cast concrete cylinder is typically 6 inches in diameter and 10-12 inches in length. The concrete should be rated at 5000 PSI or greater after 30 days of cure. To facilitate driving of concrete cylinders into the dry ground, the contractor may water inject the soil. The maximum force available to drive a concrete cylinder piling into the ground is the weight of the structure at that location. Weight is greater on inside corners of a house than on outside corners, so it is normal for concrete cylinders to be driven less deep on outside corners.