ASTM E661-22
(Test Method)Standard Test Method for Performance of Wood and Wood-Based Floor and Roof Sheathing Under Concentrated Static and Impact Loads
Standard Test Method for Performance of Wood and Wood-Based Floor and Roof Sheathing Under Concentrated Static and Impact Loads
SIGNIFICANCE AND USE
5.1 The procedures outlined will provide data that can be used to evaluate the structural performance, under concentrated loads, of roof and floor sheathing, separate from the effects of the framing, under simulated conditions representative of those in actual service.
5.2 The procedures are intended to be applied to roof or floor sheathing materials installed directly to framing. They are not intended for the evaluation of the framed assembly as a whole.
SCOPE
1.1 This test method covers procedures for determining the resistance to deflection and damage of floor and roof sheathing used in site-built construction subjected to concentrated static loads as well as impact loads from nonrigid blunt objects. It is applicable to wood and wood-based panels and boards, but is not intended to cover profiled metal decks, nor precast or cast-in-place slabs. Surface indentation is not evaluated separately from deflection.
1.2 Three applications are covered: roof sheathing, subfloors, and single floors. Roof sheathing is tested in both a dry and a wet condition, while subfloors and single floors are both tested in a dry condition, as well as a condition of having dried out after being wet. These moisture conditions are those commonly experienced with site-built construction.
Note 1: Where it is anticipated that sheathing will be subjected only to dry conditions during construction and use, or else to greater moisture exposure than is indicated in 7.3.2, the corresponding exposure conditions may be modified by agreement between the interested parties. For example, shop-built construction may be tested dry only, although the possibility of exposure to high humidity or leaks and flooding during use should be considered.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: E661 − 22
Standard Test Method for
Performance of Wood and Wood-Based Floor and Roof
1
Sheathing Under Concentrated Static and Impact Loads
This standard is issued under the fixed designation E661; 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
During construction and occupancy of a building, floor and roof sheathing are subjected to
concentrated loads that frequently govern the thickness required. Static loads may simulate either foot
traffic, or loads from fixtures, when applied through loading disks of appropriate size. Impact loads
will occur during construction and also in service.
Roof sheathing and subflooring are likely to be critical in strength or stiffness, or both, under foot
traffic and construction loads, while single-layer floors are generally critical under fixture loads, foot
traffic, and in-service impact loads. Subfloors, like single floors, must also support fixture loads, but
they will have an additional layer of material, such as underlayment above, which will help to
distribute concentrated loads.
1. Scope conversions to SI units that are provided for information only
and are not considered standard.
1.1 This test method covers procedures for determining the
1.4 This standard does not purport to address all of the
resistance to deflection and damage of floor and roof sheathing
safety concerns, if any, associated with its use. It is the
used in site-built construction subjected to concentrated static
responsibility of the user of this standard to establish appro-
loads as well as impact loads from nonrigid blunt objects. It is
priate safety, health, and environmental practices and deter-
applicable to wood and wood-based panels and boards, but is
mine the applicability of regulatory limitations prior to use.
not intended to cover profiled metal decks, nor precast or
1.5 This international standard was developed in accor-
cast-in-place slabs. Surface indentation is not evaluated sepa-
dance with internationally recognized principles on standard-
rately from deflection.
ization established in the Decision on Principles for the
1.2 Three applications are covered: roof sheathing,
Development of International Standards, Guides and Recom-
subfloors, and single floors. Roof sheathing is tested in both a
mendations issued by the World Trade Organization Technical
dry and a wet condition, while subfloors and single floors are
Barriers to Trade (TBT) Committee.
both tested in a dry condition, as well as a condition of having
dried out after being wet. These moisture conditions are those
2. Referenced Documents
commonly experienced with site-built construction.
2
2.1 ASTM Standards:
NOTE1—Whereitisanticipatedthatsheathingwillbesubjectedonlyto
D1517 Terminology Relating to Leather
dry conditions during construction and use, or else to greater moisture
E575 Practice for Reporting Data from Structural Tests of
exposure than is indicated in 7.3.2, the corresponding exposure conditions
may be modified by agreement between the interested parties. For Building Constructions, Elements, Connections, and As-
example, shop-built construction may be tested dry only, although the
semblies
possibility of exposure to high humidity or leaks and flooding during use
E631 Terminology of Building Constructions
should be considered.
3
2.2 Other Standard:
1.3 The values stated in inch-pound units are to be regarded
Fed. Spec. A-A-50197A Linen, Thread
as standard. The values given in parentheses are mathematical
1
This test method is under the jurisdiction of ASTM Committee E06 on
2
Performance of Buildings and is the direct responsibility of Subcommittee E06.11 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
on Horizontal and Vertical Structures/Structural Performance of Completed Struc- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
tures. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2022. Published October 2022. Originally the ASTM website.
ɛ1 3
approved in 1978. Last previous edition approved in 2015 as E661 – 03 (2015) . Available from U.S. General Services Administration, 1800 F Street, NW
DOI: 10.1520/E0661-22. Washington, DC 20405, https://fedspecs.gsa.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------
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This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
´1
Designation: E661 − 03 (Reapproved 2015) E661 − 22
Standard Test Method for
Performance of Wood and Wood-Based Floor and Roof
1
Sheathing Under Concentrated Static and Impact Loads
This standard is issued under the fixed designation E661; 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.
1
ε NOTE—Units information was editorially corrected in March 2015.
INTRODUCTION
During construction and occupancy of a building, floor and roof sheathing are subjected to
concentrated loads that frequently govern the thickness required. Static loads may simulate either foot
traffic, or loads from fixtures, when applied through loading disks of appropriate size. Impact loads
will occur during construction and also in service.
Roof sheathing and subflooring are likely to be critical in strength or stiffness, or both, under foot
traffic and construction loads, while single-layer floors are generally critical under fixture loads, foot
traffic, and in-service impact loads. Subfloors, like single floors, must also support fixture loads, but
they will have an additional layer of material, such as underlayment above, which will help to
distribute concentrated loads.
1. Scope
1.1 This test method covers procedures for determining the resistance to deflection and damage of floor and roof sheathing used
in site-built construction subjected to concentrated static loads as well as impact loads from nonrigid blunt objects. It is applicable
to wood and wood-based panels and boards, but is not intended to cover profiled metal decks, nor precast or cast-in-place slabs.
Surface indentation is not evaluated separately from deflection.
1.2 Three applications are covered: roof sheathing, subfloors, and single floors. Roof sheathing is tested in both a dry and a wet
condition, while subfloors and single floors are both tested in a dry condition, as well as a condition of having dried out after being
wet. These moisture conditions are those commonly experienced with site-built construction.
NOTE 1—Where it is anticipated that sheathing will be subjected only to dry conditions during construction and use, or else to greater moisture exposure
than is indicated in 7.3.2, the corresponding exposure conditions may be modified by agreement between the interested parties. For example, shop-built
construction may be tested dry only, although the possibility of exposure to high humidity or leaks and flooding during use should be considered.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1
This test method is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.11 on Horizontal
and Vertical Structures/Structural Performance of Completed Structures.
Current edition approved March 1, 2015Oct. 1, 2022. Published March 2015October 2022. Originally approved in 1978. Last previous edition approved in 20092015 as
ɛ1
E661 – 03 (2009).(2015) . DOI: 10.1520/E0661-03R15E01.10.1520/E0661-22.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E661 − 22
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D1517 Terminology Relating to Leather
E575 Practice for Reporting Data from Structural Tests of Building Constructions, Elements, Connections, and Assemblies
E631 Terminology of Building Constructions
3
2.2 Other Standards:Standard:
Fed. Spec. V-T-291E(1)Fed. Spec. A-A-50197A Linen, Thread
3. Terminology
3.1 See Terminol
...
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