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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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.

And for good reason. Reduce risk of injuries by putting performance safety layers under the field. Beyond The G-Max Test: This abstract is a brief summary of the referenced standard. Link to Active This link will always route to the current Active version of the standard. Test providers can adapt the procedures and guidelines contained herein to tests performed on any turf playing system.

GMax Test – Brock International

It also includes a protocol for determining test point locations on fields asttm are lined for multiple sports. All of these areas are regions where an athlete should expect compliant impact attenuation characteristics, but, it does not imply that an injury cannot be incurred if the surface system complies with this specification.

Measuring impact-attenuation is a fundamental tool of athletic field safety testing. This is our playground product.

Work Item s – proposed revisions of this standard. It is also useful in assessing the playability of a field. 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.

But there are three main reasons fields get hard over time when installed directly over stone: There are three measurements used to characterize safety and performance of a surface. The Gmax test essentially measures how fast the drop missle stops. It requires the missile to be dropped in a minimum of 10 locations around the field. Brock is not comfortable simply meeting industry expectations for Gmax ratings.


The original shock pad system that set all industry standards for artificial turf fields. Which is why quality natural turf is the benchmark for quality artificial turf. It comes in different thicknesses to optimize safety for the turf you select.

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: 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.

The higher the g-max value, the poorer the shock-attenuation performance of the surface.

But even considering these factors, a Brock field will consistently meet the ranges of natural grass. This is the softness or hardness under foot during play. According to the Penn State Center for Turfgrass Science, impact attenuation of a playing surface is measured by an accelerometer mounted inside the missiles, that indicates surface hardness and is reported as Gmax. This test method is applicable to natural and artificial playing surface systems and to components thereof.

GMax is one benchmark at which to rate each field. Our standard for a field with Brock is pristine natural grass, because that is the surface that every athlete would rather play on. Bringing the allowable GMax thresholds back to within reasonable limits is the current direction for most field designers and owners. The values given in parentheses are for information only.

ASTM F355 – 16E1

Adtm should not be used, without some modifications, to test the finished products. These alternate surface materials are not included in the scope of this specification. Referenced Documents purchase separately The documents listed below are referenced within the subject aatm but are not provided as part of the standard. Click for Full Story. For use under artificial turf. HIC is the internationally recognized test standard for head injuries. Smaller bodies need a different surface than the pros!

Active view current version of standard. Typical playing surfaces are wrestling mats, football fields, soccer fields, playgrounds, and so f3555. The higher the Critical Fall Height, the more protective the surface is for head injuries.


Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

A moderate head injury consists of a loss of consciousness, where a major head injury results in a skull fracture! This specification covers a test method and the corresponding performance requirement for 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.

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. All are considered concussions. 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 the field average may pass, yet have areas that would be considered unacceptable.

Hours of use, climate, and maintenance or lack thereof. 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. It drops a 10 lb hemispherical impactor from increasing heights to determine Critical Fall Height. 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.

Historical Version s – view previous versions of standard. This test simulates impact attenuation of a playing surface. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.