Standard Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)

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 and CSA 0122.
1.4 The values stated in inch-pound units are to be regarded as 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 and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
30-Sep-2005
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ASTM D3737-05 - Standard Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 3737 – 05
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D2395 Test Methods for Specific Gravity of Wood and
Wood-Based Materials
1.1 This practice covers the procedures for establishing
D2555 TestMethodsforEstablishingClearWoodStrength
allowable properties for structural glued laminated timber.
Values
Included are the allowable stresses for bending, tension and
D2915 Practice for Evaluating Allowable Properties for
compression parallel to the grain, horizontal shear, compres-
Grades of Structural Lumber
sion perpendicular to the grain, and radial tension and com-
D4761 Test Methods for Mechanical Properties of Lumber
pression in curved members. Also included are modulus of
and Wood-Base Structural Material
elasticity and modulus of rigidity.
D5456 Specification for Evaluation of Structural Compos-
1.2 This practice is limited to the calculation of allowable
ite Lumber Products
properties subject to the given procedures for the selection and
D6570 Practice for Assigning Allowable Properties for
arrangement of grades of lumber of the species considered.
Mechanically-Graded Lumber
1.3 Requirements for production, inspection and certifica-
E105 Practice for Probability Sampling of Materials
tion are not included, but in order to justify the allowable
2.2 Other Standards:
properties developed using procedures in this practice, manu-
3
ANSI/AITC A190.1 Structural Glued Laminated Timber
facturersmustconformtorecognizedmanufacturingstandards.
ANSI/AF&PA National Design Specification for Wood
Refer to ANSI/AITC A190.1 and CSA0122.
4
Construction
1.4 Thevaluesstatedininch-poundunitsaretoberegarded
5
CSA 0122 Structural Glued Laminated Timber
as standard.
1.5 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 Definitions:
responsibility of the user of this standard to establish appro-
3.1.1 Alternative lumber—laminated veneer lumber (LVL),
priate safety and health practices and determine the applica-
laminated strand lumber (LSL), oriented strand lumber (OSL),
bility of regulatory limitations prior to use.
or parallel strand lumber (PSL) meeting the requirements of
2. Referenced Documents Specification D5456, or solid-sawn lumber that is produced
2 according to Practice D6570 and the grading rules of the
2.1 ASTM Standards:
applicable grading or inspection agency.
D9 Terminology Relating to Wood
3.1.2 E-rated lumber—lumber graded for use in manufac-
D198 Test Methods of StaticTests of Lumber in Structural
turing structural glued laminated timber by nondestructive
Sizes
measurement of a modulus of elasticity (E) and by visual
D245 Practice for Establishing Structural Grades and Re-
inspection in accordance with the grading rules of the appli-
lated Allowable Properties for Visually Graded Lumber
cable grading or inspection agency.
3.1.3 glulam—a term used to denote structural glued lami-
1
nated timber, which is a product made from suitably selected
This practice is under the jurisdiction ofASTM Committee D07 on Wood and
is the direct responsibility of Subcommittee D07.02 on Lumber and Engineered
Wood Products.
3
Current edition approved Oct. 1, 2005. Published November 2005. Originally Available from theAmerican Institute ofTimber Construction, 7012 S. Revere
approved in 1978. Last previous edition approved in 2004 as D3737–04. Parkway Suite 140, Englewood, CO 80112.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American Forest and Paper Association (AF&PA), 1111 19th
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM St., NW, Suite 800, Washington, DC 20036.
5
Standards volume information, refer to the standard’s Document Summary page on Available from Canadian Standards Association (CSA), 178 Rexdale Blvd.,
the ASTM website. Toronto, ON Canada M9W1R3.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3737–05
andpreparedpiecesofwoodbondedtogetherwithanadhesive 4. Materials Requirements
either in a straight or curved form with the grain of all pieces
4.1 Requirements for Laminations
essentially parallel to the longitudinal axis of the member.
4.1.1 Laminationsofstructuralgluedlaminatedtimbershall
3.1.4 horizontally laminated timber—amemberdesignedto
be of lum
...

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