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ASTM D5457-04a

(Specification)

Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design

Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design

ABSTRACT
This specification covers procedures for computing the reference resistance of wood-based materials and structural connections for use in load and resistance factor design (LRFD). Parameters required for the derivation of reference resistance are presented. These parameters include the distribution percentile, coefficient of variation, data confidence factor, and reliability normalization factor. The shape and scale parameters of the two-parameter Weibull distribution shall be established to define the distribution of the material resistance. The data confidence factor accounts for uncertainty associated with data sets. This factor, which is a function of coefficient of variation, sample size, and reference percentile, is applied as a multiplier on the distribution estimate. The reliability normalization factor is used to adjust the distribution estimate to achieve a target reliability index. The reliability normalization factor is the ratio of the computed resistance factor to the specified resistance factor, adjusted by a scaling factor.
SCOPE
1.1 This specification covers procedures for computing the reference resistance of wood-based materials and structural connections for use in load and resistance factor design (LRFD). The reference resistance derived from this specification applies to the design of structures addressed by the load combinations in ASCE 7-02.
1.2 A commentary to this specification is provided in .

General Information

Status
Historical
Publication Date
31-Oct-2004
ICS
35.240.70 - IT applications in science
Technical Committee
D07 - Wood
Drafting Committee
D07.02 - Lumber and Engineered Wood Products
Current Stage
Ref Project

Relations

Replaces
ASTM D5457-04 - Standard Specification for Computing the Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design
Effective Date
01-Nov-2004
Replaced By
ASTM D5457-10 - Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design
Effective Date
01-Sep-2010
Referred By
ASTM D7290-06(2022) - Standard Practice for Evaluating Material Property Characteristic Values for Polymeric Composites for Civil Engineering Structural Applications
Effective Date
01-Nov-2004
Referred By
ASTM D5055-19e1 - Standard Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-Joists
Effective Date
01-Nov-2004
Referred By
ASTM D5456-21e1 - Standard Specification for Evaluation of Structural Composite Lumber Products
Effective Date
01-Nov-2004
Referred By
ASTM D7033-22 - Standard Practice for Establishing Design Capacities for Oriented Strand Board (OSB) Wood-Based Structural-Use Panels
Effective Date
01-Nov-2004

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ASTM D5457-04a - Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor DesignASTM D5457-04a - Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design
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ASTM D5457-04a - Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design
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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: D5457 – 04a
Standard Specification for
Computing Reference Resistance of Wood-Based Materials
and Structural Connections for Load and Resistance Factor
1
Design
This standard is issued under the fixed designation D5457; 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
Load and resistance factor design (LRFD) is a structural design method that uses concepts from
reliability theory and incorporates them into a procedure usable by the design community. The basic
design equation requires establishing a reference resistance based on several material property
parameters. A standard method for calculating the required material property input data is critical so
that all wood-based structural materials can be treated equitably. This specification provides the
procedures that are required for the generation of reference resistance for LRFD.
1. Scope of Full-Size Specimens
D2718 Test Methods for Structural Panels in Planar Shear
1.1 This specification covers procedures for computing the
(Rolling Shear)
reference resistance of wood-based materials and structural
D2719 Test Methods for Structural Panels in Shear
connections for use in load and resistance factor design
Through-the-Thickness
(LRFD). The reference resistance derived from this specifica-
D2915 Practice for Evaluating Allowable Properties for
tion applies to the design of structures addressed by the load
Grades of Structural Lumber
combinations in ASCE 7-02.
D3043 Test Methods for Structural Panels in Flexure
1.2 A commentary to this specification is provided in
D3500 Test Methods for Structural Panels in Tension
Appendix X1.
D3501 Test Methods for Wood-Based Structural Panels in
2. Referenced Documents Compression
2
D3737 Practice for Establishing Allowable Properties for
2.1 ASTM Standards:
Structural Glued Laminated Timber (Glulam)
D9 Terminology Relating to Wood and Wood-Based Prod-
D4761 Test Methods for Mechanical Properties of Lumber
ucts
and Wood-Base Structural Material
D143 Test Methods for Small Clear Specimens of Timber
D5055 Specification for Establishing and Monitoring Struc-
D198 Test Methods of Static Tests of Lumber in Structural
tural Capacities of Prefabricated Wood I-Joists
Sizes
D5456 SpecificationforEvaluationofStructuralComposite
D1037 Test Methods for Evaluating Properties of Wood-
Lumber Products
Base Fiber and Particle Panel Materials
E105 Practice for Probability Sampling Of Materials
D1761 Test Methods for Mechanical Fasteners in Wood
3
2.2 ASCE Standard:
D1990 Practice for Establishing Allowable Properties for
ASCE 7-02 Minimum Design Loads for Buildings and
Visually-Graded Dimension Lumber from In-Grade Tests
Other Structures
3. Terminology
1
This specification is under the jurisdiction ofASTM Committee D07 on Wood
and is the direct responsibility of Subcommittee D07.02 on Lumber and Engineered
3.1 Definitions—For general definitions of terms related to
Wood Products.
wood, refer to Terminology D9.
Current edition approved Nov. 1, 2004. Published November 2004. Originally
3.1.1 coeffıcient of variation, CV —a relative measure of
approved in 1993. Last previous edition approved in 2004 as D5457 - 04. DOI: w
10.1520/D5457-04A. variability. For this specification, the calculation of CV is
w
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
3
Standards volume information, refer to the standard’s Document Summary page on
Available from The American Society of Civil Engineers (ASCE), 1801
the ASTM website.
Alexander Bell Dr., Reston, VA 20191.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D5457 – 04a
based on the shape parameter of the 2-parameter Weibull 5. Testing
distribution. It is not the traditional sample standard deviation
5.1 Testing shall be conducted in accordance with appropri-
of the data divided by the sample mean.
ate standard testing procedures. The intent of the testing shall
3.1.2 data confidence factor, V—a factor that is used to
be to develop data that represent the capacity of the product in
adjust member reference resistance for sample variability and
service.
sample size.
5.2 Periodic Property Assessment—Periodic testing is rec-
ommended to verify that the properties of production material
3.1.3 distribution percentile, R —the value of the distribu-
p
tion associated with proportion, p, of the cumulative distribu- remain representative of published properties.
tio
...

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ASTM D5457-23(Specification)
Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design

ABSTRACT
This specification covers procedures for computing the reference resistance of wood-based materials and structural connections for use in load and resistance factor design (LRFD). Parameters required for the derivation of reference resistance are presented. These parameters include the distribution percentile, coefficient of variation, data confidence factor, and reliability normalization factor. The shape and scale parameters of the two-parameter Weibull distribution shall be established to define the distribution of the material resistance. The data confidence factor accounts for uncertainty associated with data sets. This factor, which is a function of coefficient of variation, sample size, and reference percentile, is applied as a multiplier on the distribution estimate. The reliability normalization factor is used to adjust the distribution estimate to achieve a target reliability index. The reliability normalization factor is the ratio of the computed resistance factor to the specified resistance factor, adjusted by a scaling factor.
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1.1 This specification covers the format conversion procedure for computing the reference resistance of wood-based materials and structural connections for use in load and resistance factor design (LRFD). The format conversion procedure is outlined in Section 4. The reference resistance derived from this specification applies to the design of structures addressed by the load combinations in ASCE 7-16.  
1.2 A commentary to this specification is provided in Appendix X1.  
1.3 Guidance for users considering test-based derivation of reference resistance is provided in Appendix X2.  
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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Standard Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design

ABSTRACT
This specification covers procedures for computing the reference resistance of wood-based materials and structural connections for use in load and resistance factor design (LRFD). Parameters required for the derivation of reference resistance are presented. These parameters include the distribution percentile, coefficient of variation, data confidence factor, and reliability normalization factor. The shape and scale parameters of the two-parameter Weibull distribution shall be established to define the distribution of the material resistance. The data confidence factor accounts for uncertainty associated with data sets. This factor, which is a function of coefficient of variation, sample size, and reference percentile, is applied as a multiplier on the distribution estimate. The reliability normalization factor is used to adjust the distribution estimate to achieve a target reliability index. The reliability normalization factor is the ratio of the computed resistance factor to the specified resistance factor, adjusted by a scaling factor.
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