ASTM F780-93a(1998)

Standard Test Method for Linear Deformation and Breaking Strength of Alpine Skis

SCOPE
1.1 This test method covers the determination of linear deformation load and breaking load for Alpine skis.  
1.2 This test method is applicable to all Alpine skis.  
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-1992
• ICS: 97.220.20 - Winter sports equipment
• Technical Committee: F27 - Snow and Water Sports
• Drafting Committee: F27.30 - Skiing and Snowboarding Equipment

Relations

• Replaced By: ASTM F780-93a(2006) - Standard Test Method for Linear Deformation and Breaking Strength of Alpine Skis
• Effective Date: 01-Oct-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F 780 – 93a (Reapproved 1998)
Standard Test Method for
Linear Deformation and Breaking Strength of Alpine Skis
This standard is issued under the fixed designation F780; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope tion system (1) with a range of at least 20 000 N and reading
accuracy of 6 50 N, and with an instrument (2) for reading
1.1 This test method covers the determination of linear
bending deformation (d) with an accuracy of 0.01 mm. The
deformation load and breaking load for Alpine skis.
system must have a controlled deflection rate. A standard
1.2 This test method is applicable to all Alpine skis.
universal tension/compression testing machine with X−Y
1.3 This standard does not purport to address all of the
recorder (3) is typical of such a system.
safety concerns, if any, associated with its use. It is the
5.2 The test method is made with the ski in its normal
responsibility of the user of this standard to establish appro-
horizontalposition,andtheoverhangingportionsoftheskiare
priate safety and health practices and determine the applica-
left free to deflect.
bility of regulatory limitations prior to use.
5.3 The test system shall be set up in accordance with Fig.
2. Referenced Documents 1 (Section A) with a 250-mm distance between supports and
onesupportmadewitha25-mmdiameter,low-frictionrollerat
2.1 ASTM Standards:
point of contact with the ski. The end support shall be so
D 2240 Test Method for Rubber Property—Durometer
designed as to have a hinged clamp which prohibits linear
Hardness
displacement, yet permits rotation about the support. The load
F472 Terminology for Geometry of Alpine Skis
is applied through a plate as shown in Fig. 1 (Section B), 25
3. Terminology
mm wide and of length equal to or slightly greater than the
width of the ski, made up of a steel plate (5) and a hard rubber
3.1 Definitions of Terms Specific to This Standard:
(9565ShoreAdurometer;seeTestMethodD2240)layer(4).
3.1.1 breaking load (F )—the maximum load applied in
B
The plate must be free to rotate under loading ram.
accordance with Sections 6 and 7 (that is, the maximum load
which the ski can sustain).
6. Determination of Load Application Point
3.1.2 deformation load (F )—the load applied in accor-
D
6.1 In order to obtain comparable values, the test shall be
dance with Section6 that causes a permanent deformation of 1
conducted at the load application point with a separation
mm at the load application point of the ski.
between the supports of 250 6 0.5 mm. Determine the load
4. Significance and Use
application point by moving the ski in a longitudinal direction
on the supports until a deflection is obtained under a load of
4.1 This test method provides information concerning the
600 6 5 N in accordance with the table shown below:
resistanceofaskitopermanentbendingandanindicationofits
Ski Length, L , Deflection, Tolerance,
basic strength. It is not intended to evaluate the data with N
mm (see Terminology F 472) mm mm
regard to the quality of the ski.
1700# L 2 0.03
N
1400# L < 1700 4 0.03
N
5. Apparatus
1000# L < 1400 6 0.03
N
0750# L < 1000 8 0.03
N
5.1 This test method shall be conducted on a device (see
Fig. 1) equipped with adjustable supports, a load (F) applica-
7. Procedure
7.1 Condition the ski for 24 h minimum at a temperature of
23 6 5°C. Place the ski as shown in Fig. 1, and set up the
This test method is under the jurisdiction ofASTM Committee F-27 on Snow
Ski
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