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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It drops a 10 lb hemispherical impactor from increasing heights to determine Critical Fall Height. 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 xstm, or both. There are three measurements used to characterize safety and performance of a surface. It requires the missile to be dropped in a minimum of 10 locations around the field.

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

Which is why quality natural turf is the benchmark for quality artificial turf. By partnering with leading testing f3555 and universities around the world, Brock has been able to push the safety standards for the artificial turf industry forward.

GMax Test – Brock International

This is our playground product. And for good reason. These alternate surface materials are not included in the scope of this specification. Measuring impact-attenuation is a fundamental tool of athletic field safety testing. Typical playing surfaces are wrestling mats, football fields, soccer fields, playgrounds, and so forth. Bringing the allowable GMax thresholds back to within reasonable limits is the current direction for most field designers and owners.

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. Click for Full Story. Our standard for a field with Brock is pristine natural grass, because that is the surface that every athlete would rather play on.


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. This test simulates impact attenuation of a playing surface. The higher the g-max value, the poorer the shock-attenuation performance of the surface.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Smaller bodies need a different surface than the pros! Link to Active This link will always route to the current Active version of the standard. Active view current version of standard.

Impact Machines: Sports Surface Testing Machine / standard ASTM F, F, F

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. But there are three main reasons fields get hard over time when installed directly over stone: The GMax of a field is determined by dropping the missile 3 times in wstm same location and averaging the second two drops. 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.

Link to Active This link will always route to the current Active version of the standard. Astn providers can adapt the procedures and guidelines contained herein to tests performed on any turf playing system. This abstract is a brief summary of the referenced standard. HIC is the internationally recognized test standard for head injuries. It should not be used, without some modifications, to test the finished products.


Brock is not comfortable simply meeting industry expectations for Gmax ratings. All are considered concussions. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. The Gmax test essentially measures how fast the drop missle stops.

Beyond The G-Max Test: 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. It also includes a protocol for determining test point locations on fields that are lined for multiple sports. The values given in parentheses are for information only.

ASTM F355 – 16E1

Historical Version s – view previous versions of standard. For use under artificial turf. The original shock pad system that set all industry standards for artificial turf fields. But even considering these factors, a Brock field will consistently meet the ranges of natural grass. 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 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.

The test method, aptly called the free-fall drop test, sstm be performed at eight different test point locations for four specific types of surface systems, namely:

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