Work Item
ASTM WK65030

New Specification for Release Characteristics of Alpine and Alpine Touring Bindings

1. Scope

The scope of the committee shall be standardization of specifications, test methods, practices, and terminology for:

Personal equipment used in snow and water sports (including but not limited to snow skiing, snowboarding, water skiing, wakeboarding, and inflatables) to help reduce the potential risk of injury and the promotion of knowledge as it relates to standards for snow and water sports equipment.

Freestyle jumping features located in designated terrain parks at ski areas expressly constructed for recreational, non-competitive jumping to help reduce the potential risk of injury and the promotion of knowledge as it relates to standards for freestyle jumping features.

The work of this Committee will be coordinated with other ASTM committees and other organizations having mutual interest.

Keywords

bindings; alpine touring; release mechanism

Rationale

ASTM F504 Standard Test Method for Measuring the Quasi-static Release Moment of Alpine Ski Binding specifies the application of both a moment of couple (F504-1.1 and F504-2.1) and moment of force (all other specified tests). The kinematic axis of rotation of the boot/binding system during release affect the release moment transmitted to the lower leg by the boot/binding system when the applied load is a moment of force. All ISO 9462 and ISO 13992 tests only apply a moment of couple (both method A and method B). A load almost never applied during skiing. ISO 9462 and ISO 13992 tests do not provide for the application of a moment of force. Thus, any measurement of release moment by ISO binding test methods is independent of the kinematic pivot axis of the boot/binding system. ASTM F504 provides for the application of both a moment of force and a moment of couple and is therefore a superior binding evaluation test procedure. ISO 9462 and ISO 13992 are severely limited in their ability to evaluate important binding safety features. Therefore, it is necessary to have a performance standard to accompany the ASTM F504 test method to expose design deficiencies related to the kinematic pivot axis of boot/binding systems that ISO test methods cannot reveal.

The title and scope are in draft form and are under development within this ASTM Committee.

Details

Developed by Subcommittee: F27.10

Committee: F27

Staff Manager: Joe Koury

Work Item Status

Date Initiated: 09-05-2018

Technical Contact: David Dodge

Item: 001

Ballot: F27.10 (20-01)

Status: Will Reballot Item

Item: 001

Ballot: F27 (21-04)

Status: Will Reballot Item