Find the most up-to-date version of ASTM F at Engineering Penn State’s Center for Sports Surface Research. How is Gmax tested? • American Society for Testing and Materials. (ASTM). – Synthetic Turf. • F • F Buy ASTM F TEST METHOD FOR IMPACT ATTENUATION OF PLAYING SURFACE SYSTEMS, OTHER PROTECTIVE SPORT SYSTEMS, AND .

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A moderate head injury consists of a loss of consciousness, where a major head injury results in a skull fracture! Referenced Documents purchase wstm The documents listed below are referenced within the subject standard but are not provided as part of the standard.

GMax Test – Brock International

It is also useful in assessing the playability of a field. The test method, aptly called the free-fall drop test, shall be performed at eight different test point locations for four specific types of surface systems, namely: This abstract is a brief summary of the referenced standard.

By partnering with leading testing facilities and universities around the world, Brock has been able to push the safety standards for the artificial turf industry forward. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

HIC is the internationally recognized test standard for head injuries. The original shock pad system that set all industry standards for artificial turf fields.

It comes in different thicknesses to optimize safety for the turf you select. Measuring impact-attenuation is a fundamental tool of athletic field safety testing.

All are considered concussions. There are three measurements used to characterize safety and performance of a surface. GMax is one benchmark at which to rate each field. The turf playing system typically includes field areas within and outside the inbound lines extending to the sport specific limit lines as defined by the appropriate regulating body or appropriate standard, or both.

Active view current version of standard. The GMax of a field is determined by dropping the missile 3 times in the g355 location and averaging the second two drops.


This test simulates the heel strike of atm adult running athlete in stride. It is possible, and quite common, to have areas of the field with very high Gmax scores, while other areas such as sidelines with low Gmax Scores, so r355 field average may pass, yet have areas that would be considered unacceptable. All of these areas are regions where an athlete should expect compliant impact attenuation characteristics, but, it does not imply that an injury cannot astk incurred if the surface system complies with this specification.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Our standard for a field with Brock is pristine natural grass, because that is the surface that every asym would rather play on.

PowerBase Pro provides the ideal balance between shock absorption and field stiffness for elite athletes and is the only product engineered for NCAA, Pro and elite level players. This is our playground product. Test providers can adapt the procedures and guidelines contained herein to tests performed on any turf playing system.

It requires the missile to be dropped in a minimum of 10 locations around the field. This specification covers a test method and the corresponding performance requirement f535 the maximum impact attenuation in all types of turf playing systems installed for North American football fields that is intended to establish a method for identifying and reporting areas within an existing playing system where shock-absorbing properties exceed recommended threshold values.

Typical playing surfaces are wrestling mats, football fields, soccer fields, playgrounds, and so forth. Click for Full Story. Bringing the f3555 GMax thresholds back to f35 reasonable limits is the current direction for most field designers and owners.

But even considering these factors, a Sstm field will consistently meet the ranges of natural grass. Put into perspective, the impacts forces allowed on an artificial turf surface are somewhat ludicrous. Beyond The G-Max Test: Smaller bodies need a different surface than the pros! And for good reason. For use under artificial turf.


These alternate surface materials are not included in the scope of this specification. But there are three main reasons fields get hard over time when installed directly over stone: The values given in parentheses are for information only. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Which is why quality natural turf is the benchmark for quality artificial turf.

It drops a 10 lb hemispherical impactor from increasing heights to determine Critical Fall Height. Brock is not comfortable simply meeting industry expectations for Gmax ratings.

Link to Active This link will always route to the current Active version of the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

Historical Version s – view previous versions of standard. Link to Active This link will always route to the current Active version of the standard. This is the softness or hardness under foot during play. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

It also includes a protocol for determining test point locations on fields that are lined for multiple sports. The higher the Critical Fall Height, the more protective the surface is for head injuries.

Note 1—This test method may also be used to measure the shock-attenuation properties of materials used as protective padding, such as the padding on trampoline frames, football goal posts, gymnasium wall, shoulder pads, body padding, and so forth.

Sports Surface Testing Machine

This test simulates impact attenuation of a playing surface. The higher the g-max value, the poorer the shock-attenuation performance of the surface. Reduce risk of injuries by putting performance safety layers under the field.