ASTM D7199-20

Standard Practice for Establishing Characteristic Values for Reinforced Glued Laminated Timber (Glulam) Beams Using Mechanics-Based Models

ABSTRACT
This practice covers mechanics-based models for calculating characteristic values for the strength and stiffness of reinforced structural glued laminated timbers (glulam). The mechanics-based analyses shall account for the following: (1) stress-strain relationships for wood laminations and reinforcement; (2) strain compatibility; (3) equilibrium; (4) variability of mechanical properties; (5) volume effects; (6) finger-joint effects; (7) laminating effects; and (8) stress concentrations at the termination of reinforcement in beams with partial length reinforcement. This practice also provides for minimum physical test requirements to validate mechanics-based models. A minimum set of performance-based durability test requirements for reinforced glulams is also herein described. Additional durability test requirements shall be considered in accordance with the specific end-use environment.
SCOPE
1.1 This practice describes procedures for establishing the characteristic values for reinforced structural glued-laminated timber (glulam) beams using mechanics-based models and validated by full-scale beam tests. Glulam beams shall be manufactured in accordance with applicable provisions of ANSI A190.1.  
1.2 This practice also describes a minimum set of performance-based durability test requirements for reinforced glulam beams, as specified in Annex A1. Additional durability test requirements shall be considered in accordance with the specific end-use environment. Appendix X1 provides an example of a mechanics-based methodology that satisfies the requirements set forth in this practice.  
1.3 This practice is limited to procedures for establishing flexural properties (modulus of rupture, MOR, and modulus of elasticity, MOE) about the x-x axis of horizontally-laminated reinforced glulam beams.  
1.4 The establishment of secondary properties, such as bending about the y-y axis, shear parallel to grain, tension parallel to grain, compression parallel to grain, and compression perpendicular to grain, for the reinforced glulam beams are beyond the scope of this practice.
Note 1: When the establishment of secondary properties is deemed necessary, testing according to other applicable methods, such as Test Methods D143 and D198 or analysis in accordance with Practice D3737, may be considered.  
1.5 Reinforced glulam beams subjected to axial loads are outside the scope of this practice.  
1.6 Proper safety, serviceability, and adjustment factors including duration of load, to be used in design are outside the scope of this practice.  
1.7 Evaluation of unbonded, prestressed, and shear reinforcement is outside the scope of this practice.  
1.8 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. The mechanics-based model shall be permitted to be developed using SI or inch-pound units.  
1.9 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.  
1.10 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.

General Information

• Status: Published
• Publication Date: 31-Jul-2020
• ICS: 79.060.99 - Other wood-based panels
• Technical Committee: D07 - Wood
• Drafting Committee: D07.02 - Lumber and Engineered Wood Products

Standards Content (Sample)

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: D7199 − 20
Standard Practice for
Establishing Characteristic Values for Reinforced Glued
Laminated Timber (Glulam) Beams Using Mechanics-Based
1
Models
This standard is issued under the fixed designation D7199; 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 1.7 Evaluation of unbonded, prestressed, and shear rein-
forcement is outside the scope of this practice.
1.1 This practice describes procedures for establishing the
characteristic values for reinforced structural glued-laminated 1.8 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
timber (glulam) beams using mechanics-based models and
validated by full-scale beam tests. Glulam beams shall be conversions to SI units that are provided for information only
and are not considered standard. The mechanics-based model
manufactured in accordance with applicable provisions of
ANSI A190.1. shall be permitted to be developed using SI or inch-pound
units.
1.2 This practice also describes a minimum set of
1.9 This standard does not purport to address all of the
performance-based durability test requirements for reinforced
safety concerns, if any, associated with its use. It is the
glulam beams, as specified in AnnexA1.Additional durability
responsibility of the user of this standard to establish appro-
test requirements shall be considered in accordance with the
priate safety, health, and environmental practices and deter-
specific end-use environment. Appendix X1 provides an ex-
mine the applicability of regulatory limitations prior to use.
ample of a mechanics-based methodology that satisfies the
1.10 This international standard was developed in accor-
requirements set forth in this practice.
dance with internationally recognized principles on standard-
1.3 This practice is limited to procedures for establishing
ization established in the Decision on Principles for the
flexural properties (modulus of rupture, MOR, and modulus of
Development of International Standards, Guides and Recom-
elasticity, MOE) about the x-x axis of horizontally-laminated
mendations issued by the World Trade Organization Technical
reinforced glulam beams.
Barriers to Trade (TBT) Committee.
1.4 The establishment of secondary properties, such as
bending about the y-y axis, shear parallel to grain, tension 2. Referenced Documents
parallel to grain, compression parallel to grain, and compres-
2
2.1 ASTM Standards:
sion perpendicular to grain, for the reinforced glulam beams
D9Terminology Relating to Wood and Wood-Based Prod-
are beyond the scope of this practice.
ucts
D143Test Methods for Small Clear Specimens of Timber
NOTE 1—When the establishment of secondary properties is deemed
necessary, testing according to other applicable methods, such as Test
D198Test Methods of Static Tests of Lumber in Structural
Methods D143 and D198 or analysis in accordance with Practice D3737,
Sizes
may be considered.
D905Test Method for Strength Properties of Adhesive
1.5 Reinforced glulam beams subjected to axial loads are
Bonds in Shear by Compression Loading
outside the scope of this practice.
D1990Practice for Establishing Allowable Properties for
Visually-Graded Dimension Lumber from In-Grade Tests
1.6 Proper safety, serviceability, and adjustment factors
of Full-Size Specimens
including duration of load, to be used in design are outside the
D2559Specification for Adhesives for Bonded Structural
scope of this practice.
Wood Products for Use Under Exterior Exposure Condi-
tions
1
This practice is under the jurisdiction ofASTM Committee D07 on Wood and
is the direct responsibility of Subcommittee D07.02 on Lumber and Engineered
2
Wood Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Aug. 1, 2020. Published August 2020. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2006. Last previous edition approved in 2012 as D7199–07 (2012). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D7199-20. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D7199 − 20
D2915Practice for Sampling and Data-Analysis for Struc- 3.2.9 reinforcement—lamination or material that is not a
tural Wood an
...

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: D7199 − 07 (Reapproved 2012) D7199 − 20
Standard Practice for
Establishing Characteristic Values for Reinforced Glued
Laminated Timber (Glulam) Beams Using Mechanics-Based
1
Models
This standard is issued under the fixed designation D7199; 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 mechanics-based requirements for calculating describes procedures for establishing the characteristic
values for the strength and stiffness of reinforced structural glued laminated timbers (glulam) manufactured in accordance with
applicable provisions of ANSI/AITC A190.1, subjected to quasi-static loadings. It addresses methods to obtain bending properties
parallel to grain, about the x-x axis (Freinforced structural glued-laminated timber (glulam) beams using mechanics-based models
and validated by full-scale beam tests. Glulam beams shall be manufactured in accordance with applicable provisions of ANSI
A190.1. and E ) for horizontally-laminated reinforced glulam beams. Secondary properties such as bending about the y-y axis
bx x
(F ), shear parallel to grain (F and F ), tension parallel to grain (F ), compression parallel to grain (F ), and compression
by vx vy t c
perpendicular to grain (F ') are beyond the scope of this practice. When determination of secondary properties is deemed
c
necessary, testing according to other applicable methods, such as Test Methods D143, D198 or analysis in accordance with Practice
D3737, is required to establish these secondary properties. Reinforced glulam beams subjected to axial loads are outside the scope
of this standard. This practice also provides minimum test requirements to validate the mechanics-based model.
1.2 TheThis practice also describes a minimum set of performance-based durability test requirements for reinforced glulams,
glulam beams, as specified in Annex A1. Additional durability test requirements shall be considered in accordance with the specific
end-use environment. Appendix X1 provides an example of a mechanics-based methodology that satisfies the requirements set
forth in this standard.practice.
1.3 This practice is limited to procedures for establishing flexural properties (modulus of rupture, MOR, and modulus of elasticity,
MOE) about the x-x axis of horizontally-laminated reinforced glulam beams.
1.4 The establishment of secondary properties, such as bending about the y-y axis, shear parallel to grain, tension parallel to grain,
compression parallel to grain, and compression perpendicular to grain, for the reinforced glulam beams are beyond the scope of
this practice.
NOTE 1—When the establishment of secondary properties is deemed necessary, testing according to other applicable methods, such as Test Methods D143
and D198 or analysis in accordance with Practice D3737, may be considered.
1.5 Reinforced glulam beams subjected to axial loads are outside the scope of this practice.
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 Oct. 1, 2012Aug. 1, 2020. Published October 2012August 2020. Originally approved in 2006. Last previous edition approved in 20072012 as
D7199 – 07.D7199 – 07 (2012). DOI: 10.1520/D7199-07R12.10.1520/D7199-20.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D7199 − 20
1.6 Characteristic strength and elastic properties obtained using this standard may be used as a basis for developing design values.
However, the proper safety, serviceabilityProper safety, serviceability, and adjustment factors including duration of load, to be used
in design are outside the scope of this standard.practice.
1.7 This practice does not cover unbonded reinforcement, prestressed reinforcement, nor shear reinforcement.Evaluation of
unbonded, prestressed, and shear reinforcement is outside the scope of this practice.
1.8 The values stated in SIinch-pound units are to be regarded as standard. The mechanics based model may be values given in
parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. The
mechanic
...