Surface Performance, to carry out Gmax testing in Ajo, Arizona, use a 20lb, cylindrical weight, dropped from 24inches to measure how many G’s of force a surface can absorb upon impact. Surface Performance accredited engineers carry out Gmax testing to ASTM F355 & F1936 which state that any field with a Gmax rating over over 200G’s is deemed unsafe for use.

To ensure player safety is closely monitored it is recommended that Gmax testing is carried out annually.