ASTM D6643-01(2011)
(Test Method)Standard Test Method for Testing Wood-Base Panel Corner Impact Resistance
Standard Test Method for Testing Wood-Base Panel Corner Impact Resistance
SIGNIFICANCE AND USE
This test method determines the corner impact damage that could be used to measure the relative corner impact resistance.
SCOPE
1.1 This test method shall be used to measure the relative corner impact resistance and other damage that may occur during the rough handling of wood-base panels or composite materials. This test method is suitable for all wood-base panels such as plywood, oriented strand board, hardboard, particleboard and medium density fiberboard as well as other composite panel products.
1.2 This test method covers determination and evaluation of the effects of panels being dropped from various heights with a predetermined amount of dead load and angle of impact to simulate an equivalent field application.
1.3 The values of all information will be stated in English units and regarded as standard. The SI values are written in parentheses.
1.4 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.
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Standards Content (Sample)
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Designation: D6643 − 01(Reapproved2011)
Standard Test Method for
Testing Wood-Base Panel Corner Impact Resistance
This standard is issued under the fixed designation D6643; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Corner impact resistance may be an important property for wood-base panel applications such as
pallets, cargo crates, concrete form boards, fruit and vegetable boxes and furniture. There is a need to
have suitable corner impact resistance in such products to ensure satisfactory end–use performance.
This test method provides a technique to assess relative corner impact resistance of wood-base panels.
This test method uses a vertical test frame to create corner impact on a panel specimen. The test
specimen is held in a fixture that free-falls to the floor. The test specimen is examined for distance of
impact damage and for qualitative damage.
1. Scope tive Density) of Wood and Wood-Based Materials
D4442 Test Methods for Direct Moisture Content Measure-
1.1 This test method shall be used to measure the relative
ment of Wood and Wood-Based Materials
corner impact resistance and other damage that may occur
during the rough handling of wood-base panels or composite
3. Terminology
materials. This test method is suitable for all wood-base panels
such as plywood, oriented strand board, hardboard, particle- 3.1 Definitions:
3.1.1 actual damage, n—distance of damage counted from
board and medium density fiberboard as well as other compos-
ite panel products. tip to damage line after dropping.
3.1.2 damage line, n—the innermost line where crushing
1.2 This test method covers determination and evaluation of
occurs.
the effects of panels being dropped from various heights with
a predetermined amount of dead load and angle of impact to
3.1.3 dropping head, n—the part of the machine connected
simulate an equivalent field application.
to the quick release mechanism that holds the test specimen
andaddedamountofdeadload.Thedroppingheadfree-fallsto
1.3 The values of all information will be stated in English
create the impact between the panel specimen and the floor.
units and regarded as standard. The SI values are written in
parentheses. 3.1.4 impact tip, n—the part of the specimen that will make
initial contact with the floor after dropping.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.1.5 peeling, n—the furthermost splintering from the dam-
responsibility of the user of this standard to establish appro- age line. This provides additional understanding of damage
priate safety and health practices and determine the applica- characteristics.
bility of regulatory limitations prior to use.
3.1.6 pull cord, n—cord that is connected to the quick
release mechanism that allows a quick release of the dropping
2. Referenced Documents
head by pulling.
2.1 ASTM Standards:
3.1.7 quick release mechanism, n—the equipment that al-
D2395 Test Methods for Density and Specific Gravity (Rela-
lows for free release of the head when the pull cord is
activated.
This test method is under the jurisdiction of ASTM Committee D07 on Wood 3.1.8 reference line, n—line from which all measurements
and is the direct responsibility of Subcommittee D07.03 on Panel Products.
are taken. This allows samples to be cut to approximate size
Current edition approved Nov. 1, 2011. Published November 2011. Originally
and still ensure accurate values.
approved in 2001. Last previous edition approved in 2001 as D6643 – 01 (2006).
DOI: 10.1520/D6643-01R11.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4. Summary of Test Method
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.1 Specimens are cut from the corners of the sample panel.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. The specimens are fastened to the lower edge of a dropping
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6643 − 01(2011)
head and clamped into position. The weight of the dropping
headiscontrolledtosimulatetheweightoftherealapplication.
The dropping head is raised to specified heights and released to
fall to a rigid floor or other surface. The corner damage as well
as peeling is measured to indicate the corner impact resistance.
Peeling beyond the damage line may also be reported.
4.2 Optionally, sample can be subjected to wet-dry cycles to
simulate end-use applications.
5. Significance and Use
5.1 This test method determines the corner impact damage
that could be used to measure the relative corner impact
resistance.
6. Apparatus
6.1 The drop test frame shall accommodate the test speci-
mensasdefinedinSection8.Atestframe15-ft(4572-mm)tall,
27-in. (686-mm) wide and 15-in. (381-mm) deep has been
found suitable. The drop test frame shall be made of steel or
other suitable material with two guide poles placed on either
side to allow for smooth, low friction dropping from controlled
heights. The lower half of the frame should be covered with a
metal mesh to provide protection from flying debris. A door
should be placed at the bottom of the frame to provide access
for loading the specimens and changing the weight. A test
frame found suitable for this method is shown in Fig. 1.
6.2 The dropping head should be large enough to attach to
guide poles on either side of the test frame as well as be able
to firmly attach the test specimen and hold additional weight.
Theweightofthedroppinghead,excludingthepanelspecimen
shall be 31.5 6 0.25 lb (14.29 6 0.11 kg).
NOTE 1—The weight of the dropping head may be adjusted to target a
different weight if relevant to a specific intended application. This
FIG. 1 Drop Test Machine
typically requires additional weight to be added to the dropping head.
6.3 Metal bars should support the dropping head while
changing specimens and the dead load to ensure no accidents
occur
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