ASTM D5516-01
(Test Method)Standard Test Method for Evaluating the Flexural Properties of Fire-Retardant Treated Softwood Plywood Exposed to Elevated Temperatures
Standard Test Method for Evaluating the Flexural Properties of Fire-Retardant Treated Softwood Plywood Exposed to Elevated Temperatures
SCOPE
1.1 This test method is designed to determine the effect of exposure to high temperatures and humidities on the flexure properties of fire-retardant treated softwood plywood. In this test method, plywood is exposed to a temperature of 77oC (170oF).
1.2 The purpose of the test method is to compare the flexural properties of fire-retardant treated plywood relative to untreated plywood. The results of tests conducted in accordance with this test method provide a reference point for estimating strength temperature relationships. This test method is intended to provide an accelerated test at elevated temperatures and controlled humidities of plywood sheathing treated with the same chemical formulation(s) and processing conditions as plywood used commercially.
1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
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: D 5516 – 01 An American National Standard
Standard Test Method for
Evaluating the Flexural Properties of Fire-Retardant Treated
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Softwood Plywood Exposed to Elevated Temperatures
This standard is issued under the fixed designation D 5516; 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.
1. Scope AWPA C–27 Plywood-Fire Retardant Treatment by Pres-
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sure Processes
1.1 This test method is designed to determine the effect of
2.3 Federal Standard:
exposure to high temperatures and humidities on the flexure
U.S. Product Standard PS1 for Construction and Industrial
properties of fire-retardant treated softwood plywood. In this
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Plywood
test method, plywood is exposed to a temperature of 77°C
(170°F).
3. Terminology
1.2 The purpose of the test method is to compare the
3.1 Definitions—Definitions used in this test method are in
flexural properties of fire-retardant treated plywood relative to
accordance with Terminologies D 9 and E 176, and Nomencla-
untreated plywood. The results of tests conducted in accor-
ture D 1165.
dance with this test method provide a reference point for
3.2 Definitions of Terms Specific to This Standard:
estimating strength temperature relationships. This test method
3.2.1 depth of beam—that dimension of the beam which is
is intended to provide an accelerated test at elevated tempera-
perpendicular to the span and parallel to the direction in which
tures and controlled humidities of plywood sheathing treated
the load is applied.
with the same chemical formulation(s) and processing condi-
3.2.2 span—the total distance between the centerline of
tions as plywood used commercially.
supports providing the reactions on which a beam is supported
1.3 The values stated in SI units are to be regarded as the
to accommodate a transverse load.
standard. The values in parentheses are for information only.
3.2.3 span-depth ratio—the numerical ratio of span divided
1.4 This standard does not purport to address all of the
by beam depth.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 After preconditioning (see 6.5), matched specimens of
bility of regulatory limitations prior to use.
treated and untreated plywood will be exposed to 77°C (170°F)
2. Referenced Documents temperature and relative humidity equal to or greater than
50 %.
2.1 ASTM Standards:
2
4.2 Flexural strength tests are conducted on exposed speci-
D 9 Terminology Relating to Wood
mens removed after various time periods. Flexural strength
D 1165 Nomenclature of Domestic Hardwoods and Soft-
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results shall include maximum moment, bending stiffness, and
woods
work to maximum load. Adjust the test results to 67 % relative
D 2915 Practice for Evaluating Allowable Properties for
2 humidity. (See X1.2.)
Grades of Structural Lumber
2 4.3 The purpose of this test method is to determine the ratio
D 3043 Methods of Testing Structural Panels in Flexure
of the treated mean to the untreated mean for the plywood and
D 3201 Test Method for Hygroscopic Properties of Fire-
2 plot the accelerated exposure strength data against exposure
Retardant Wood and Wood-Base Products
time.
E 84 Test Method for Surface Burning Characteristics of
3
Building Materials
5. Significance and Use
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E 176 Terminology of Fire Standards
5.1 The flexural properties evaluated by this test method are
2.2 American Wood Preservers’ Association Standard:
intended to provide any one or all of the following:
5.1.1 Data on the comparative effects of fire-retardant
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This test method is under the jurisdiction of ASTM Committee D07 on Wood chemical formulations and environmental conditions on the
and is the direct responsibility of Subcommittee D07.07 on Fire Performance of
flexural properties of plywood.
Wood.
Current edition approved March 10, 2001. Published May 2001. Originally
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published as ES 20 – 91. Last previous edition D 5516 – 00. Available from American Wood-Preservers’ Assoc., P.O. Box 5690, Granbury,
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Annual Book of ASTM Standards, Vol 04.10. TX 76049–0690.
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Annual Book of ASTM Standards, Vol 04.07. Available from U.S. Department of Commerce, Washington, DC.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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D 5516
5.1.2 Data for use in developing modification factors for the
allowable design properties of treated plywood when exposed
to elevated temperatures and humidities.
5.1.3 Data comparing var
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