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 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 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. Click for Full Story.
Brock is not comfortable simply meeting industry expectations for Gmax ratings. It is also useful in assessing the playability of a field. The Gmax test essentially measures how fast the drop missle stops. It drops a 10 lb hemispherical impactor from increasing heights to determine Critical Fall Height.
Sports Surface Testing Machine
Referenced Documents purchase separately The documents listed f3555 are referenced within the subject standard but are not provided as part of the standard. It is astj 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 requires the missile to be dropped in a minimum of 10 locations around the field. This test method is applicable to natural and artificial playing surface systems and to components thereof. This abstract is a brief summary of the referenced standard. There are three measurements used to characterize safety and performance of a surface.
Reduce risk of injuries by putting performance safety layers under the field. It should not be used, without some modifications, to test the finished products. Test providers can adapt the procedures and guidelines contained herein to tests d355 on any turf playing system. The values given in parentheses r355 mathematical conversions to SI units that are provided for information only and are not considered standard.
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. These alternate surface materials are not included in the scope of this specification. HIC is the internationally recognized test standard for head injuries.
And for good reason. 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: Hours of use, climate, and maintenance or lack thereof. Historical Version s – view previous versions of standard.
This test simulates impact attenuation of a playing surface. Bringing the allowable GMax thresholds back to within reasonable limits is the current direction for most field designers and owners. 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.
GMax Test – Brock International
Measuring impact-attenuation is a fundamental tool of athletic field safety testing. GMax is one benchmark at which to rate each field. 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 Critical Fall Height, the more protective the surface is for head injuries.
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It is the asstm of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
The higher the g-max value, the poorer the shock-attenuation performance of the surface. A moderate head injury consists of a loss of consciousness, where a major head injury results in a skull fracture! Active view current version of standard.
Typical playing surfaces are wrestling mats, football fields, soccer fields, playgrounds, and so forth. All of these areas are regions where an asym 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.
Impact Machines: Sports Surface Testing Machine / standard ASTM F, F, F
The values given in parentheses are for information only. This test simulates the heel strike of an adult running athlete in stride. This is the softness or hardness under foot during play.