Proper site surface preparation depends upon potential fall heights, the surface depth increases accordingly. For example, a jungle gym or playground equipment would need a deeper playground surfacing to compensate for critical fall height potential, and meet current ASTM HIC (head injury criteria) standards.
Fall HeightSurface Depth 4 feet1.5 inches 5 feet2.0 inches 6 feet2.5 inches 7 feet3.0 inches 8 feet3.5 inches 9 feet4.0 inches 10 feet4.5 inches
Learn More