ASTM D6643-01
(Test Method)Standard Test Method for Testing Wood-Base Panel Corner Impact Resistance
Standard Test Method for Testing Wood-Base Panel 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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Designation:D6643–01
Standard Test Method for
Testing Wood-Base Panel Corner Impact Resistance
This standard is issued under the fixed designation D 6643; 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 (e) 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 3.1.1 actual damage, n—distance of damage counted from
tip to damage line after dropping.
1.1 This test method shall be used to measure the relative
3.1.2 damage line, n—the innermost line where crushing
corner impact resistance and other damage that may occur
occurs.
during the rough handling of wood-base panels or composite
3.1.3 dropping head, n—the part of the machine connected
materials. This test method is suitable for all wood-base panels
to the quick release mechanism that holds the test specimen
such as plywood, oriented strand board, hardboard, particle-
andaddedamountofdeadload.Thedroppingheadfree-fallsto
board and medium density fiberboard as well as other compos-
create the impact between the panel specimen and the floor.
ite panel products.
3.1.4 impact tip, n—the part of the specimen that will make
1.2 This test method covers determination and evaluation of
initial contact with the floor after dropping.
the effects of panels being dropped from various heights with
3.1.5 peeling, n—the furthermost splintering from the dam-
a predetermined amount of dead load and angle of impact to
age line. This provides additional understanding of damage
simulate an equivalent field application.
characteristics.
1.3 The values of all information will be stated in English
3.1.6 pull cord, n—cord that is connected to the quick
units and regarded as standard. The SI values are written in
release mechanism that allows a quick release of the dropping
parentheses.
head by pulling.
1.4 This standard does not purport to address all of the
3.1.7 quick release mechanism, n—the equipment that al-
safety concerns, if any, associated with its use. It is the
lows for free release of the head when the pull cord is
responsibility of the user of this standard to establish appro-
activated.
priate safety and health practices and determine the applica-
3.1.8 reference line, n—line from which all measurements
bility of regulatory limitations prior to use.
are taken. This allows samples to be cut to approximate size
2. Referenced Documents and still ensure accurate values.
2.1 ASTM Standards:
4. Summary of Test Method
D 2395 Test Method for Specific Gravity of Wood and
4.1 Specimens are cut from the corners of the sample panel.
Wood-Base Materials
The specimens are fastened to the lower edge of a dropping
D 4442 TestMethodsforDirectMoistureContentMeasure-
head and clamped into position. The weight of the dropping
ment of Wood and Wood-Base Materials
headiscontrolledtosimulatetheweightoftherealapplication.
3. Terminology
The dropping head is raised to specified heights and released to
fall to a rigid floor or other surface. The corner damage as well
3.1 Definitions:
as peeling is measured to indicate the corner impact resistance.
Peeling beyond the damage line may also be reported.
This test method is under the jurisdiction of ASTM Committee D07 on Wood
4.2 Optionally, sample can be subjected to wet-dry cycles to
and is the direct responsibility of Subcommittee D07.03 on Panel Products.
simulate end-use applications.
Current edition approved April 10, 2001. Published June 2001.
Annual Book of ASTM Standards, Vol 04.10.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6643
NOTE 1—The weight of the dropping head may be adjusted to target a
5. Significance and Use
different weight if relevant to a specific intended application. This
5.1 This test method determines the corner impact damage
typically requires additional weight to be added to the dropping head.
that could be used to measure the relative corner impact
6.3 Metal bars should support the dropping head while
resistance.
changing specimens and the dead load to ensure no accidents
occur during adjustments. The test specimen should be
6. Apparatus
clamped to the bottom of the dropping head to make sure the
6.1 The drop test frame shall accommodate the test speci-
corner of the specimen will contact the floor first. A hook is
mensasdefinedinSection8.Atestframe15-ft(4572-mm)tall,
mounted at the top of the dropping head to attach to the quick
27-in. (686-mm) wide and 15-in. (381-mm) deep has been
release mechanism.
found suitable. The drop test frame shall be made of steel or
6.4 Attached to the quick release mechanism is a pull cord
other suitable material with two guide poles placed on either
for the operator to start the test. A hand winch with a cable is
side to allow for smooth, low friction dropping from controlled
also connected to the quick release mechanism to winch the
heights. The lower half of the frame should be covered with a
dropping head and test specimen to the desired height.
metal mesh to provide protection from flying debris. A door
6.5 The test frame is equipped with a measuring device to
should be placed at the bot
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