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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The F3555 test essentially measures how fast the drop missle stops. Typical playing surfaces are wrestling mats, football fields, soccer fields, playgrounds, and so forth.

Test providers can adapt the procedures and guidelines contained herein to tests performed on any turf playing system. Historical Version s – view previous versions of standard.

The GMax of a field is determined by dropping the missile 3 times in the same location and averaging the second two drops.

ASTM F355 – 16E1

The safety of the playing surface only degrades over time. It requires the missile to be dropped in a minimum of aastm locations around the field. These alternate surface materials are not included in the scope of this specification. For use under artificial turf. And for good reason.

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. This test method is applicable to natural and artificial playing surface systems and to components thereof. 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.

This test simulates the heel strike of an adult running athlete in stride. GMax is one benchmark at which to rate each field. This test simulates impact attenuation of a playing surface. The original shock pad system that set all industry standards for artificial turf fields. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.


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 adtm, or both.

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. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

Bringing the allowable GMax thresholds back to within reasonable limits is the current direction for most field designers and owners.

Active view current version of standard. 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. It is possible, and quite common, to have areas of the field with astn 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.

This is our playground product. Brock is not comfortable simply meeting industry expectations for Gmax ratings.

Work Item s – proposed revisions of this standard. Which is why quality natural turf is the benchmark for quality artificial turf.

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.

This is the softness or hardness under foot during g355. It drops a 10 lb hemispherical impactor from increasing heights to determine Critical Fall Height.

Smaller bodies need a different surface than the pros! But there are three main reasons fields get hard over time when installed directly over stone: Click for Full Story. It is also useful in assessing the playability of a field.


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.

GMax Test – Brock International

The higher the g-max value, the poorer the shock-attenuation asm 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. All are considered concussions. It comes in different thicknesses to optimize safety for the turf you select. Link to Active This link will always route to the current Active version of the standard.

Beyond The G-Max Test: The higher the Critical Fall Height, the more protective the surface is for head injuries.

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

Hours of use, climate, and maintenance or lack thereof. According to the Penn Asym 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.

Astk 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.

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.

Measuring impact-attenuation aastm a fundamental tool of athletic field safety testing.

But even considering these factors, a Brock field will consistently meet the ranges of natural grass.