ASTM D5055-08a - 15.4.2008
 
1. Scope

1.1 General—This specification gives procedures for establishing, monitoring, and reevaluating structural capacities of prefabricated wood I-joists. Capacities considered are shear, reaction, moment, and stiffness. Procedures for establishing common details are given and certain design considerations specific to wood I-joists are itemized.

1.2 Contents of the Standard—An index and brief description of the main features of this specification are given in X1.1.1.

1.3 Development of the Standard—The development and intent of this specification is discussed in Appendix X1.

1.4 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.

1.5 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. A specific precautionary statement is given in 6.1.1.5.

 
2. Referenced Documents

PS-20

American Softwood Lumber Standard

D7480-21

Standard Guide for Evaluating the Attributes of a Forest Management Plan

E699-16

Standard Specification for Agencies Involved in Testing, Quality Assurance, and Evaluating of Manufactured Building Components (Withdrawn 2025)

IEEE/ASTM SI 10

Standard for Use of the International System of Units (SI): The Modern Metric System

PS-1

Structural Plywood

E4-24

Standard Practices for Force Calibration and Verification of Testing Machines

E529-04(2026)

Standard Guide for Conducting Flexural Tests on Beams and Girders for Building Construction

D198-22a

Standard Test Methods of Static Tests of Lumber in Structural Sizes (Includes all amendments and changes 10/14/2022).

D245-25

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

D1990-26a

Standard Practice for Establishing Allowable Properties for Visually-Graded Dimension Lumber from In-Grade Tests of Full-Size Specimens (Includes all amendments and changes 8/25/2026).

D2559-12a(2024)

Standard Specification for Adhesives for Bonded Structural Wood Products for Use Under Exterior Exposure Conditions (Includes all amendments and changes 9/19/2024).

D2915-25

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

D4761-25

Standard Test Methods for Mechanical Properties of Lumber and Wood-Based Structural Materials

D5456-26

Standard Specification for Evaluation of Structural Composite Lumber Products

D5457-23

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

D7247-25

Standard Test Method for Evaluating the Shear Strength of Adhesive Bonds in Laminated Wood Products at Elevated Temperatures