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

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 f3555. Which is why quality natural turf is the benchmark for quality artificial turf. The safety of the playing surface only degrades over time. Click for Full Story. For use under artificial turf. But there are three main reasons fields get hard over time when installed directly over stone: It also includes a protocol for determining test point locations on fields that are lined for multiple sports.

Typical playing surfaces are wrestling mats, football fields, soccer fields, playgrounds, and so forth. 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 aastm that would be considered unacceptable.

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.

This test method is applicable to natural and artificial playing surface systems and to components thereof. Hours of use, climate, and maintenance or lack thereof. Reduce risk of injuries by putting performance safety layers under the field.


GMax is one benchmark at which to rate each field. 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.

And for good reason. It comes in different thicknesses to optimize safety for the turf you select. Put into perspective, the impacts forces allowed on an artificial turf surface asgm somewhat ludicrous. 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.

Smaller bodies need a different surface than the pros! Active view current version of standard. The turf playing system typically includes field areas within and ast, the inbound lines extending to the sport specific limit lines as defined by the appropriate regulating body or appropriate standard, or both. HIC is the internationally recognized test standard for head injuries. This is the softness or hardness under foot during play.

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

Beyond The G-Max Test: Our standard for a field with Brock is pristine natural grass, because that is the surface that every athlete would ashm play on. It should not be used, without some modifications, to test the finished products.

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.

The GMax of a field is determined by dropping the missile 3 times in the same location axtm 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 f55 system complies with this specification.


Sports Surface Testing Machine

But even considering these factors, a Brock field will consistently meet the ranges of natural grass. The higher the Critical Fall Height, the more protective the surface is for head injuries. These alternate surface materials are not included in the scope of this specification.

A moderate head injury consists of a loss of consciousness, where a major head injury results in a skull fracture! Test providers can adapt the procedures and guidelines contained herein to tests performed on any turf playing system. Work Item s – proposed revisions satm this standard. According to the Penn State Center for Turfgrass Science, impact attenuation of a playing surface asgm measured by an accelerometer mounted inside the missiles, that indicates surface hardness and is reported as Gmax.

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.

All are considered concussions. 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: It is also useful in assessing the playability of a field.

ASTM F355 – 16E1

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. The original shock pad system that set all industry standards for artificial turf fields. Measuring impact-attenuation is a fundamental tool of athletic field safety testing. Bringing the allowable GMax thresholds back to within reasonable limits is asttm current direction for most field designers and owners.

It requires wstm missile to be dropped in a minimum of 10 locations around the field. The Gmax test essentially measures how fast the drop missle stops. The higher the g-max value, the poorer the shock-attenuation performance of the surface.