ASTM F780-93a(2006)

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

SIGNIFICANCE AND USE
This test method provides information concerning the resistance of a ski to permanent bending and an indication of its basic strength. It is not intended to evaluate the data with regard to the quality of the ski.
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.
This standard does not purport to address all of the safety concerns, 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: 30-Sep-2006
• ICS: 97.220.20 - Winter sports equipment
• Technical Committee: F27 - Snow and Water Sports
• Drafting Committee: F27.30 - Skiing and Snowboarding Equipment

Relations

• Replaces: ASTM F780-93a(1998) - Standard Test Method for Linear Deformation and Breaking Strength of Alpine Skis
• Effective Date: 01-Oct-2006
• Replaced By: ASTM F780-93a(2012) - Standard Test Method for Linear Deformation and Breaking Strength of Alpine Skis
• Effective Date: 01-Mar-2012

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F780 – 93a (Reapproved 2006)
Standard Test Method for
Linear Deformation and Breaking Strength of Alpine Skis
ThisstandardisissuedunderthefixeddesignationF780;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) 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 650 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
D2240 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:
(95 65ShoreAdurometer;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
dancewithSection6thatcausesapermanentdeformationof1
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 F472) 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
This test method is under the jurisdiction of ASTM Committee F27 on Snow
23 6 5°C. Place the ski as shown in Fig. 1, and set up the
Skiing and is the direct responsibility of F27.30 on Skis and Boots.
...