ASTM D5516-03
(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
SIGNIFICANCE AND USE
The flexural properties evaluated by this test method are intended to provide any one or all of the following:
5.1.1 Data on the comparative effects of fire-retardant chemical formulations and environmental conditions on the flexural properties of plywood.
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 variables, such as other plywood species and dimensions.
Results obtained from tests conducted and analyzed in accordance with the procedures of this test method may be used with other information to establish recommended roof sheathing spans for fire-retardant treated plywood.
Note 1—Temperatures lower than the test temperature specified in this test method and the cumulative effects of the elevated temperatures and humidity exposures expected to be encountered in service should be taken into account when recommended roof sheathing spans are established.
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 77°C (170°F).
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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Designation:D5516–03
Standard Test Method for
Evaluating the Flexural Properties of Fire-Retardant Treated
1
Softwood Plywood Exposed to Elevated Temperatures
This standard is issued under the fixed designation D5516; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope Adjustment Factors for Fire-Retardant Plywood Wood
2
Sheathing
1.1 This test method is designed to determine the effect of
E84 Test Method for Surface Burning Characteristics of
exposure to high temperatures and humidities on the flexure
3
Building Materials
properties of fire-retardant treated softwood plywood. In this
3
E176 Terminology of Fire Standards
test method, plywood is exposed to a temperature of 77°C
2.2 Other Standards:
(170°F).
AWPAC–27 Plywood-Fire Retardant Treatment by Pres-
1.2 The purpose of the test method is to compare the
4
sure Processes
flexural properties of fire-retardant treated plywood relative to
U.S. Product StandardPS1 for Construction and Industrial
untreated plywood. The results of tests conducted in accor-
5
Plywood
dance with this test method provide a reference point for
NFPA 703 Standard for Fire Retardant Impregnated Wood
estimatingstrengthtemperaturerelationships.Thistestmethod
6
and Fire Retardant Coatings for Building Materials
is intended to provide an accelerated test at elevated tempera-
tures and controlled humidities of plywood sheathing treated
3. Terminology
with the same chemical formulation(s) and processing condi-
3.1 Definitions—Definitions used in this test method are in
tions as plywood used commercially.
accordancewithTerminologiesD9andE176,andNomencla-
1.3 The values stated in SI units are to be regarded as the
ture D1165.
standard. The values in parentheses are for information only.
3.2 Definitions of Terms Specific to This Standard:
1.4 This standard does not purport to address all of the
3.2.1 depth of beam—that dimension of the beam which is
safety concerns, if any, associated with its use. It is the
perpendicular to the span and parallel to the direction in which
responsibility of the user of this standard to establish appro-
the load is applied.
priate safety and health practices and determine the applica-
3.2.2 span—the total distance between the centerline of
bility of regulatory limitations prior to use.
supports providing the reactions on which a beam is supported
2. Referenced Documents to accommodate a transverse load.
3.2.3 span-depth ratio—the numerical ratio of span divided
2.1 ASTM Standards:
2
by beam depth.
D9 Terminology Relating to Wood
D1165 Nomenclature of Domestic Hardwoods and Soft-
4. Summary of Test Method
2
woods
6.5), matched specimens of
4.1 After preconditioning (see
D2915 Practice for Evaluating Allowable Properties for
2 treatedanduntreatedplywoodwillbeexposedto77°C(170°F)
Grades of Structural Lumber
2 temperature and relative humidity equal to or greater than
D3043 Test Methods for Structural Panels in Flexure
50%.
D5516 Test Methods for Evaluating the Mechanical Prop-
4.2 Flexural strength tests are conducted on exposed speci-
erties of Fire-Retardant Treated Softwood Plywood Ex-
2 mens removed after various time periods. Flexural strength
posed to Elevated Temperatures
results shall include maximum moment, bending stiffness, and
D6305 Practice for Calculating Bending Strength Design
work to maximum load.Adjust the test results to 67% relative
humidity. (See X1.2.)
1
This test method is under the jurisdiction of ASTM Committee D07 on Wood
3
and is the direct responsibility of Subcommittee D07.07 on Fire Performance of Annual Book of ASTM Standards, Vol 04.07.
4
Wood. Available fromAmerican Wood-Preservers’Assoc., P.O. Box 5690, Granbury,
Current edition approved April 10, 2003. Published June 2003. Originally TX 76049–0690.
5
approved in 1991 as ES20–91. Last previous edition approved in 2002 as Available from U.S. Department of Commerce, Washington, DC.
6
D5516–02. Available from National Fire Protection Association, P.O. Box 9191, Quincy,
2
Annual Book of ASTM Standards, Vol 04.10. MA 02269-9101.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D5516–03
4.3 The purpose of this test method is to determine the ratio
of the treated mean to the untreated mean for the plywood and
plot the accelerated exposure strength data against exposure
time.
5. Significance and Use
5.1 Theflexuralpropertiesevaluatedbythistestmethodare
intended to provide any one or all of the following:
5.1.1 Data on the comparative effects of fire-retardant
ch
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D5516–02 Designation: D 5516 – 03
Standard Test Method for
Evaluating the Flexural Properties of Fire-Retardant Treated
1
Softwood Plywood Exposed to Elevated Temperatures
This standard is issued under the fixed designation D5516; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. 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 77°C (170°F).
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.
2. Referenced Documents
2.1 ASTM Standards:
2
D9 Terminology Relating to Wood
2
D1165 Nomenclature of Domestic Hardwoods and Softwoods
2
D2915 Practice for Evaluating Allowable Properties for Grades of Structural Lumber
2
D3043 Test Methods for Structural Panels in Flexure
D5516 Test Methods for Evaluating the Mechanical Properties of Fire-Retardant Treated Softwood Plywood Exposed to
2
Elevated Temperatures
2
D6305 Practice for Calculating Bending Strength Design Adjustment Factors for Fire-Retardant Plywood Wood Sheathing
3
E84 Test Method for Surface Burning Characteristics of Building Materials
3
E176 Terminology of Fire Standards
2.2 Other Standards:
4
AWPAC–27 Plywood-Fire Retardant Treatment by Pressure Processes
5
U.S. Product StandardPS1 for Construction and Industrial Plywood
6
NFPA 703 Standard for Fire Retardant Impregnated Wood and Fire Retardant Coatings for Building Materials
3. Terminology
3.1 Definitions—Definitions used in this test method are in accordance with Terminologies D9 and E176, and Nomenclature
D1165.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 depth of beam—that dimension of the beam which is perpendicular to the span and parallel to the direction in which the
load is applied.
3.2.2 span—the total distance between the centerline of supports providing the reactions on which a beam is supported to
accommodate a transverse load.
1
This test method is under the jurisdiction of ASTM Committee D07 on Wood and is the direct responsibility of Subcommittee D07.07 on Fire Performance of Wood.
Current edition approved Nov.April 10, 2002.2003. Published JanuaryJune 2003. Originally approved in 1991 as ES20–91. Last previous edition approved in 20012002
as D5516–01a. D5516–02.
2
Annual Book of ASTM Standards, Vol 04.10.
3
Annual Book of ASTM Standards, Vol 04.07.
4
Available from American Wood-Preservers’ Assoc., P.O. Box 5690, Granbury, TX 76049–0690.
5
Available from U.S. Department of Commerce, Washington, DC.
6
Available from National Fire Protection Association, P.O. Box 9191, Quincy, MA 02269-9101.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D5516–03
3.2.3 span-depth ratio—the numerical ratio of span divided by beam depth.
4. Summary of Test Method
4.1 After preconditioning (see 6.5), matched specimens of treated and untreated plywood will be exposed to 77°C (170°F)
temperature and relative humidity equal to or greater than 50%.
4.2 Flexural strength tests are conducted on exposed specimens removed after various time periods. Flexural strength results
shall include maximum moment, bending stiffness, and work to maximum load.Adjust the test results to 67% relative humidity.
(See X1.2.)
4.3 Thepurposeofthistestmethodistodetermin
...
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