ASTM D6555 - 17

    Standard Guide for Evaluating System Effects in Repetitive-Member Wood Assemblies

    Active Standard ASTM D6555 | Developed by Subcommittee: D07.05

    Book of Standards Volume: 04.10

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    This guide identifies the variables to consider when evaluating the performance of repetitive-member wood assemblies for parallel framing systems. This guide discusses general approaches to quantifying an assembly adjustment including limitations of methods and materials when evaluating repetitive-member assembly performance, and does not address the techniques for modeling or testing of such.

    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 guide identifies variables to consider when evaluating repetitive-member assembly performance for parallel framing systems.

    1.2 This guide defines terms commonly used to describe interaction mechanisms.

    1.3 This guide discusses general approaches to quantifying an assembly adjustment including limitations of methods and materials when evaluating repetitive-member assembly performance.

    1.4 This guide does not detail the techniques for modeling or testing repetitive-member assembly performance.

    1.5 The analysis and discussion presented in this guideline are based on the assumption that a means exists for distributing applied loads among adjacent, parallel supporting members of the system.

    1.6 Evaluation of creep effects is beyond the scope of this guide.

    1.7 This guide does not purport to suggest or establish appropriate safety levels for assemblies, but cautions users that designers often interpret that safety levels for assemblies and full structures should be higher than safety levels for individual structural members.

    Note 1: Methods other than traditional safety factor approaches, such as reliability methods, are increasingly used to estimate the probability of failure of structural elements. However, the extension of these methods to assemblies or to complete structures is still evolving. For example, complete structures will likely exhibit less variability than individual structural elements. Additionally, there is a potential for beneficial changes in failure modes (i.e., more ductile failure modes in systems). These considerations are beyond the scope of this guide.

    1.8 The values stated in inch-pound units are to be regarded as the standard. The SI equivalents are approximate in many cases.

    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 and health 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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D245 Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber

    D1990 Practice for Establishing Allowable Properties for Visually-Graded Dimension Lumber from In-Grade Tests of Full-Size Specimens

    D2915 Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based Products

    D5055 Specification for Establishing and Monitoring Structural Capacities of Prefabricated Wood I-Joists

    Other Documents

    ANSI/ASAE EP559.1-2010 Design Requirements and Bending Properties for Mechanically-Laminated Wood Assemblies Available from American Society of Agricultural and Biological Engineers (ASABE), 2950 Niles Road, St. Joseph, MI 49085,

    ANSI/AWC NDS-2015 National Design Specification (NDS) for Wood Construction

    ICS Code

    ICS Number Code 91.080.20 (Timber structures)

    UNSPSC Code

    UNSPSC Code 30103600(Structural products)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D6555-17

    Citation Format

    ASTM D6555-17, Standard Guide for Evaluating System Effects in Repetitive-Member Wood Assemblies, ASTM International, West Conshohocken, PA, 2017,

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