GMax Safety Testing


Do you have a synthetic field? Think it's maintenance-free? Think again! How can you be sure that your synthetic field is up to the standard accepted by the Synthetic Turf Council? You need to know about GMax Safety Testing!

Players on any athletic field are exposed to some risk of injury. When a player falls on a synthetic field, the impact is absorbed either by the playing surface or the player’s body. The “harder” the surface, the greater amount of impact is absorbed by the player’s body; and therefore, the greater the probability a fall will result in serious injury. How can you protect your players, extend the life of your field(s) and lower your liability.
Call us now for a GMax Testing quote: (732) 560-8844

Annual GMax Testing

GMax Testing is used to measure the shock-absorbing properties of synthetic sports surfaces, recreation areas and natural grass fields. The higher the GMax value, the harder the surface. GMax measurements are a fundamental tool of athletic field safety testing and are useful in assessing the “playability” of a field. The GMax Testing standard utilizes the American Society for Testing and Materials (ASTM) specifications F355-A and F1936. If these standards are not met the field is considered unsafe and remediation is required. The assumption is if the field is too hard it’s dangerous and if it’s too soft it contributes to excessive leg fatigue.

When to GMax Test

As a synthetic field ages, GMax values tend to increase–meaning your field is getting harder with less shock absorption. Of course this depends on the construction of the field, the specific materials used, the amount and levels of play, environmental conditions and frequency of field maintenance. So how often is enough? It is accepted in the industry that new synthetic fields should always be tested once before they are opened for play. After that an annual test is most beneficial.

  • Annual testing demonstrates a serious commitment to safety
  • Fields become unsafe over time, so annual testing can warn of arising safety hazards
  • Changes in GMax readings can also be an early sign that problems are developing - an annual test can alert you to these problems before they become critical
  • Annual testing generates a historical record - one that can be important if warranty or liability issues arise
  • Testing yearly isn't expensive and can save you money in the long run by extending the live of your field

Results of GMax Testing are in a comprehensive report, which will indicate if the field meets the safety requirements established by the ASTM standards. The specific readings are included in the report so that the field owners can determine what actions should be taken to meet the required safety specifications.

Our Field Hardness Testing Reports Include: GMax Values - Impact Velocity - Severity Index - Head Injury Criterion

Do it Right! When you make the commitment to have your synthetic fields tested, have the tests done properly by a SportCare Technician. We are independent test providers using state-of-the-art equipment which complies with ASTM test standards.