ASTM F472-92(2006)
(Terminology)Standard Terminology for Geometry of Alpine Skis
Standard Terminology for Geometry of Alpine Skis
SCOPE
1.1 These definitions cover the terms required to describe the geometry of Alpine skis and do not cover special purpose skis.
1.2 The terms are presented in a sequence considered to be the most logical, with definitions presented later calling upon those presented earlier.
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Designation:F472–92 (Reapproved 2006)
Standard Terminology for
Geometry of Alpine Skis
ThisstandardisissuedunderthefixeddesignationF472;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This terminology covers the terms required to describe
thegeometryofAlpineskisanddoesnotcoverspecialpurpose
skis.
1.2 The terms are presented in a sequence considered to be
the most logical, with definitions presented later calling upon
those presented earlier.
2. Significance and Use
2.1 A standard set of definitions is needed to allow manu-
facturers, consumers, retailers, and scientists to use a common
language in describing Alpine skis.
3. Definitions (Refer to Figs. 1 and 2)
ski tail, T—the extreme rear edge of the ski.
ski tip, S—the extreme forward point or edge of the ski.
ski size—see the following:
developed length, L —bottom contour length as measured
N
FIG. 1 Alpine Ski Locations
from the ski tip to the ski tail, commonly called the material
length.
chord length, L —straight line distance measured between length, L and the sum of l plus l or l =L −( l + l ).
TS
P T S C P T S
the ski tail and ski tip with the ski pressed against a plane
tail height, h —the height of the underside of the tail from a
T
surface.
plane surface with the center of the ski body pressed against
that surface.
DISCUSSION—Either method at the manufacturer’s discretion may be
tip height, h —the height of the underside of the tip from a
S
used to indicate nominal ski length or ski size when rounded to
plane surface with the center of the ski body pressed against
common increment.
that surface.
projected length, L —length of the projection of the ski,
P
thickness,t—thickness,measuredperpendiculartotherunning
measured between the ski tip and the ski tail parallel to the
surface. X indicates the location of thickness measurement
A
ski body pressed against a plane surface.
from the tail of the ski.
tail turn-up length, l —the projected length of the tail
T
width, b—total distance measured perpendicular to the center
turn-up,measuredfromtheskitailtothecontactpointwhere
line on the running surface. X indicates the location of ski
b
a0.5-mmfeelergaugeintersectstherunningsurfacewiththe
width from the tail of the ski.
ski body pressed against a plane surface.
heel,b —thewidestpartoftheskiinthetailsectionoftheski.
H
shovel length,l —the projected length of the forward turn-up,
S
measured from the tip to the contact point where a 0.5-mm
feeler gauge intersects the running surface with the ski body
pressed against a plane surface.
contact length, l —the difference between the projected
C
This terminology is under the jurisdiction of ASTM Committee F27 on Snow
Skiing and is the direct responsibility of Subcommittee F27.30 on Skis and Boots.
Current edition approved Oct. 1, 2006. Published December 2006. Originally
approved in 1976. Last previous edition approved in 1998 as F472 – 92 (1998).
DOI: 10.1520/F0472-92R06. FIG. 2 Alpine Ski
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