Committee Members & Roster
View the ANSI 117 Committee Membership Roster
Note that this APA Standards Committee is currently inactive.
ANSI 117-2025: Standard Specification for Structural Glued Laminated Timber of Softwood Species establishes the reference design values, layup requirements, and basic requirements that manufacturers and designers rely on when producing and specifying structural glued laminated timber (glulam). The standard provides the technical foundation for glulam design — including reference values for bending, tension, compression, and shear — giving engineers and architects the data they need to specify glulam members with confidence. For manufacturers, it defines the specific layup combinations that determine a glulam product's structural classification and performance characteristics.
Note: This APA Standards Committee is currently inactive. Some links or forms may have changed. Contact APA with any questions.
ANSI 117-2025: Standard Specification for Structural Glued Laminated Timber of Softwood Species establishes reference design values and layup requirements for structural glued laminated timber (glulam). Published by APA and approved by ANSI, the standard is used by glulam manufacturers, structural engineers, architects, specifiers, and code officials.
Applies to structural glued laminated timber (glulam) made from softwood species — an engineered, stress-rated product comprising wood laminations bonded together with adhesives, with grain approximately parallel longitudinally
Covers glulam members that may be end-joined to form any length, edge-bonded to make any width, face-glued to form any depth, or bent to curved form during bonding
Provides reference design values for use with Allowable Stress Design (ASD); conversion formulas for Load and Resistance Factor Design (LRFD) are provided in the NDS
Design values for glulam used in utility structures can be obtained by applying conversion factors from ANSI O5.2
Incorporates both U.S. customary units and the International System of Units (SI), with U.S. customary values as the standard
Design values: Tabulated reference design values for bending, shear, compression, tension, modulus of elasticity, radial stresses, and torsion across multiple stress classes and combination symbols
Species and combinations: Design properties and layup information for eight species groups with both visually graded and E-rated combinations
Stress class system: Groups combinations with similar design stresses to simplify specification and give manufacturers flexibility in lumber sourcing
Layup requirements: Specifies lumber grades, zone percentages, and lamination placement for each combination, including special tension lamination requirements
Laminating lumber grading: Detailed grading rules covering visual grades, E-rated grades, and tension lamination grades with requirements for knot size, slope of grain, density, and moisture content
Alternate combinations: Permits unlisted combinations provided design values are established per ASTM D3737 or full-scale testing per ASTM D7341, with approval by an accredited inspection agency
Quality assurance: Requires production in plants audited and licensed by an accredited inspection agency meeting ANSI A190.1, with periodic third-party auditing
View the ANSI 117 Committee Membership Roster
Note that this APA Standards Committee is currently inactive.
There is no active ballot at this time.
In July 2024, the APA Standards Committee on ANSI 117, Standard Specification for Structural Glued Laminated Timber of Softwood Species, was formed to revise the national standard under the consensus process accredited by the American National Standards Institute (ANSI). This national standard, designated as ANSI 117-2025, supersedes ANSI 117-2020 with editorial changes in the standard format, update of referenced standards, and adding Eastern Hemlock-Tamarack, Eastern Hemlock-Balsam Fir to the standard as part of the Softwood Species.
A full overview of all previous versions of ANSI 117 is available in the Standard.