ASTM D3737-18
(Practice)Standard Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)
Standard Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)
ABSTRACT
This practice details the standard procedures for establishing the allowable properties for structural glued laminated timber (glulam). Allowable properties include: stress indexes; stress modification factors associated with slop of grain; stresses for bending, tension and compression parallel to the grain; horizontal shear; compression perpendicular to the grain; radial tension and compression stresses in curved members; grade adjustment factors; modulus of elasticity; and modulus of rigidity. This practice is limited to the calculation of allowable properties subject to the given procedures for the selection and arrangement of grades of lumber of the species considered. It does not cover the requirements for production, inspection and certification, but in order to justify the allowable properties developed using procedures in this practice, manufacturers must conform to recognized manufacturing standards.
SCOPE
1.1 This practice covers the procedures for establishing allowable properties for structural glued laminated timber. Included are the allowable stresses for bending, tension and compression parallel to the grain, horizontal shear, compression perpendicular to the grain, and radial tension and compression in curved members. Also included are modulus of elasticity and modulus of rigidity.
1.2 This practice is limited to the calculation of allowable properties subject to the given procedures for the selection and arrangement of grades of lumber of the species considered.
1.3 Requirements for production, inspection and certification are not included, but in order to justify the allowable properties developed using procedures in this practice, manufacturers must conform to recognized manufacturing standards. Refer to ANSI A190.1 and CSA O122.
1.4 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.
1.5 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.
1.6 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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Designation: D3737 − 18
Standard Practice for
Establishing Allowable Properties for Structural Glued
1
Laminated Timber (Glulam)
This standard is issued under the fixed designation D3737; 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 2. Referenced Documents
2
1.1 This practice covers the procedures for establishing 2.1 ASTM Standards:
allowable properties for structural glued laminated timber. D9Terminology Relating to Wood and Wood-Based Prod-
Included are the allowable stresses for bending, tension and ucts
compression parallel to the grain, horizontal shear, compres- D143Test Methods for Small Clear Specimens of Timber
sion perpendicular to the grain, and radial tension and com- D198Test Methods of Static Tests of Lumber in Structural
pression in curved members. Also included are modulus of Sizes
elasticity and modulus of rigidity. D245Practice for Establishing Structural Grades and Re-
lated Allowable Properties for Visually Graded Lumber
1.2 This practice is limited to the calculation of allowable
D2395TestMethodsforDensityandSpecificGravity(Rela-
properties subject to the given procedures for the selection and
tive Density) of Wood and Wood-Based Materials
arrangement of grades of lumber of the species considered.
D2555PracticeforEstablishingClearWoodStrengthValues
1.3 Requirements for production, inspection and certifica-
D2915Practice for Sampling and Data-Analysis for Struc-
tion are not included, but in order to justify the allowable
tural Wood and Wood-Based Products
properties developed using procedures in this practice, manu-
D4761Test Methods for Mechanical Properties of Lumber
facturersmustconformtorecognizedmanufacturingstandards.
and Wood-Base Structural Material
Refer to ANSI A190.1 and CSAO122.
D5456Specification for Evaluation of Structural Composite
Lumber Products
1.4 Thevaluesstatedininch-poundunitsaretoberegarded
as standard. The values given in parentheses are mathematical D6570Practice forAssigningAllowable Properties for Me-
conversions to SI units that are provided for information only chanically Graded Lumber
E105Practice for Probability Sampling of Materials
and are not considered standard.
2.2 Other Standards:
1.5 This standard does not purport to address all of the
3
ANSI A190.1Structural Glued Laminated Timber
safety concerns, if any, associated with its use. It is the
ANSI/AWCNational Design Specification for Wood Con-
responsibility of the user of this standard to establish appro-
4
struction
priate safety, health, and environmental practices and deter-
5
CSAO122Structural Glued Laminated Timber
mine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions:
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
2
mendations issued by the World Trade Organization Technical
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Barriers to Trade (TBT) Committee.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
1 3
This practice is under the jurisdiction ofASTM Committee D07 on Wood and Available fromAPA–The EngineeredWoodAssociation,Tacoma,WA98466,
is the direct responsibility of Subcommittee D07.02 on Lumber and Engineered http://www.apawood.org.
4
Wood Products. AvailablefromAmericanWoodCouncil(AWC),222CatoctinCircle,SE,Suite
Current edition approved April 1, 2018. Published May 2018. Originally 201, Leesburg, VA 20175, http://www.awc.org.
5
approved in 1978. Last previous edition approved in 2012 as D3737–12. DOI: Available from Canadian Standards Association (CSA), 5060 Spectrum Way,
10.1520/D3737-18. Mississauga, ON L4W 5N6, Canada, http://www.csa.ca.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3737 − 18
3.1.1 alternative lumber—laminated veneer lumber (LVL), a knot) at the edge of the lumber to the cross sectional area of
laminated strand lumber (LSL), oriented strand lumber (OSL), the lumber (see Fig. 1).
or parallel strand lumber (PSL) meeting the requirements of
3.1.11 GDS—theprojectedsumofallGDEandGDCvalues
Specification D5456; or solid-sawn lumber that is produced
within a one-foot length of lumber as defined in Fig. 1.
according to Practice D6570 and the grading rules of the
3.1
...
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.
Designation: D3737 − 12 D3737 − 18
Standard Practice for
Establishing Allowable Properties for Structural Glued
1
Laminated Timber (Glulam)
This standard is issued under the fixed designation D3737; 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. Scope
1.1 This practice covers the procedures for establishing allowable properties for structural glued laminated timber. Included are
the allowable stresses for bending, tension and compression parallel to the grain, horizontal shear, compression perpendicular to
the grain, and radial tension and compression in curved members. Also included are modulus of elasticity and modulus of rigidity.
1.2 This practice is limited to the calculation of allowable properties subject to the given procedures for the selection and
arrangement of grades of lumber of the species considered.
1.3 Requirements for production, inspection and certification are not included, but in order to justify the allowable properties
developed using procedures in this practice, manufacturers must conform to recognized manufacturing standards. Refer to
ANSI/AITC A190.1 ANSI A190.1 and CSA O122.
1.4 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.
1.5 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.
1.6 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:
D9 Terminology Relating to Wood and Wood-Based Products
D143 Test Methods for Small Clear Specimens of Timber
D198 Test Methods of Static Tests of Lumber in Structural Sizes
D245 Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber
D2395 Test Methods for Density and Specific Gravity (Relative Density) of Wood and Wood-Based Materials
D2555 Practice for Establishing Clear Wood Strength Values
D2915 Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based Products
D4761 Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material
D5456 Specification for Evaluation of Structural Composite Lumber Products
D6570 Practice for Assigning Allowable Properties for Mechanically Graded Lumber
E105 Practice for Probability Sampling of Materials
3
2.2 AITC Standards:
ANSI/AITC A190.1 Structural Glued Laminated Timber, 2007
1
This practice is under the jurisdiction of ASTM Committee D07 on Wood and is the direct responsibility of Subcommittee D07.02 on Lumber and Engineered Wood
Products.
Current edition approved Nov. 1, 2012April 1, 2018. Published December 2012May 2018. Originally approved in 1978. Last previous edition approved in 20092012 as
D3737 – 09D3737 – 12.E01. DOI: 10.1520/D3737-12.10.1520/D3737-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3737 − 18
2.2 Other Standards:
3
ANSI A190.1 Structural Glued Laminated Timber
4
ANSI/AF&PA ANSI/AWC National Design Specification for Wood Construction
5
CSA O122 Structural Glued Laminated Timber
3. Terminology
3.1 Definitions:
3.1.1 alternative lumber—laminated veneer lumber (LVL), laminated strand lumber (LSL), oriented strand lumber (OSL), or
parallel strand lumber (PSL) meeting the requirements of Specification D5456; or solid-sawn lumber that is produced according
to Practice D6570 and the grading rules of the applicable grading or inspection
...
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