What is the minimum thickness of a bottom hold-down pad for a tank?

The minimum thickness of a bottom hold-down pad for a tank is crucial to ensure proper support and stability. A thickness of 8 inches is typically specified to withstand the weight of the tank and its contents, as well as to resist the forces from environmental factors like soil movement and water pressure. This dimension plays a vital role in preventing potential shifting or settling of the tank over time, which could lead to leaks or structural issues.

Furthermore, the specified thickness ensures that the pad provides adequate load distribution, reducing point loading that may cause localized failure. While thicker pads may be required in some cases, depending on tank size or local regulations, 8 inches generally represents the minimum recommended standard for standard underground storage tank installations. This thickness aligns with industry practices aimed at maintaining safety and integrity in UST installations.