ASTM International

ASTM D5456 - 11a Standard Specification for Evaluation of Structural Composite Lumber Products


Source: ASTM International

This specification recognizes the complexity of structural glued products. This specification, or parts thereof, shall be applicable to structural composite lumber portions of manufactured structural components. Tests shall be performed to determine the properties of the material in accordance to the following test methods: moisture content measurement; bending; tension parallel to grain; compression parallel to grain; compression perpendicular to grain; longitudinal shear; connections; bond quality; product durability; edgewise bending durability; lateral edge nail durability; thickness swell; and density gradient through the thickness.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification recognizes the complexity of structural glued products. Consequently, this specification covers both specific procedures and statements of intent that sampling and analysis must relate to the specific product.

1.2 This specification was developed in the light of currently manufactured products as defined in 3.2. Materials that do not conform to the definitions are beyond the scope of this specification. A brief discussion is found in Appendix X1.

1.3 Details of manufacturing procedures are beyond the scope of this specification.

Note 1—There is some potential for manufacturing variables to affect the properties of members that are loaded for sustained periods of time. Users of this specification are advised to consider the commentary on this topic in Appendix X1.

1.4 This specification primarily considers end use in dry service conditions, such as with most protected framing members, where the average equilibrium moisture content for solid-sawn lumber is less than 16 %. The conditioning environment of 6.3 is considered representative of such uses.

1.5 The performance of structural composite lumber is affected by wood species, wood element size and shape, and adhesive and production parameters. Therefore, products produced by each individual manufacturer shall be evaluated to determine their product properties, regardless of the similarity in characteristics to products produced by other manufacturers. Where a manufacturer produces product in more than one facility, each production facility shall be evaluated independently. For additional production facilities, any revisions to the full qualification program in accordance with this specification shall be approved by the independent qualifying agency.

1.6 This specification is intended to provide manufacturers, regulatory agencies, and end users with a means to evaluate a composite lumber product intended for use as a structural material.

1.7 This specification covers initial qualification sampling, mechanical and physical tests, analysis, and design value assignments. Requirements for a quality-control program and cumulative evaluations are included to ensure maintenance of allowable design values for the product.

1.8 This specification, or parts thereof, shall be applicable to structural composite lumber portions of manufactured structural components.

1.9 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.

1.10 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.

2. Referenced Documents (purchase separately)

ASTM Standards
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus
C384 Test Method for Impedance and Absorption of Acoustical Materials by Impedance Tube Method
C423 Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method
D9 Terminology Relating to Wood and Wood-Based Products
D143 Test Methods for Small Clear Specimens of Timber
D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
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
D669 Test Method for Dissipation Factor and Permittivity Parallel with Laminations of Laminated Sheet and Plate Materials
D1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel Materials
D1666 Test Methods for Conducting Machining Tests of Wood and Wood-Base Panel Materials
D1761 Test Methods for Mechanical Fasteners in Wood
D2132 Test Method for Dust-and-Fog Tracking and Erosion Resistance of Electrical Insulating Materials
D2394 Test Methods for Simulated Service Testing of Wood and Wood-Base Finish Flooring
D2395 Test Methods for Specific Gravity of Wood and Wood-Based Materials
D2559 Specification for Adhesives for Bonded Structural Wood Products for Use Under Exterior Exposure Conditions
D2718 Test Methods for Structural Panels in Planar Shear (Rolling Shear)
D2915 Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based Products
D3201 Test Method for Hygroscopic Properties of Fire-Retardant Wood and Wood-Based Products
D3755 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials Under Direct-Voltage Stress
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials
D4761 Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material
D4933 Guide for Moisture Conditioning of Wood and Wood-Based Materials
D5055 Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-Joists
D5457 Specification for Computing Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design
D5764 Test Method for Evaluating Dowel-Bearing Strength of Wood and Wood-Based Products
D6815 Specification for Evaluation of Duration of Load and Creep Effects of Wood and Wood-Based Products
D7247 Test Method for Evaluating the Shear Strength of Adhesive Bonds in Laminated Wood Products at Elevated Temperatures
D7480 Guide for Evaluating the Attributes of a Forest Management Plan
E84 Test Method for Surface Burning Characteristics of Building Materials
E96/E96M Test Methods for Water Vapor Transmission of Materials
E119 Test Methods for Fire Tests of Building Construction and Materials

CSA Standards
CSAStandardsforWoodA O112-M Series

Index Terms

allowable design stresses; mechanical properties; quality assurance; structural composite lumber; Structural composite lumber (SCL)--specifications; Tensile length effect; Volume effect parameter determination; Wood products--specifications; Bending volume effect; Composite wood products; Design stresses; Exponent determination; Lumber--specifications; Mechanical properties; Parallel strand lumber; Parameters; Performance--building materials/applications; Performance--composites; Physical properties/dimensions/characteristics; SCL (structural composite lumber) connection properties; Solid-sawn lumber; Stress grading--lumber; Structural building materials/applications--specifications; Structural building materials/applications (wood)--specifications;

ICS Code

ICS Number Code 79.060.01 (Wood-based panels in general)

DOI: 10.1520/D5456-11A

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