ASTM D7341-14
Standard Practice for Establishing Characteristic Values for Flexural Properties of Structural Glued Laminated Timber by Full-Scale Testing

Standard No.

ASTM D7341-14

Release Date

2014

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D7341-21

Latest

ASTM D7341-21

Scope

10.1 Full-scale bending testing is an effective way to determine flexural properties of structural glued laminated timber (glulam) beams. However, testing of large glulam members is cost prohibitive. Mathematical models, when confirmed by full-scale test results, are useful tools to assign flexural properties for glulam. This practice provides guidelines for sampling and testing full-scale glulam beams to determine their flexural properties and to validate mathematical models intended for use in assigning flexural design values.

1.1 This practice describes procedures for full scale testing of structural glued laminated timber (glulam) to determine or verify characteristic values used to calculate flexural design properties. Guidelines are given for: (1) testing individual structural glued laminated timber lay-ups (with no modeling), (2) testing individual glulam combinations (with limited modeling), and (3) validating models used to predict characteristic values.

1.2 This practice is limited to procedures for establishing flexural properties (Modulus of Rupture, MOR, and Modulus of Elasticity, MOE). Some of the principles for sampling and analysis presented may be applicable to other properties. However, other properties may require additional testing considerations that are beyond the scope of this practice.

1.3 This practice is not intended to supersede the provisions of Practice D3737, but provides an alternative method for establishing characteristic values. Lay-up combinations developed in accordance with Practice D3737 are not required to be governed by this standard.

Note 1—The models described by Practice D3737 have been developed and modified based on more than 508201;years of experience and many test programs. In some cases, however, it may be desirable to develop a new model based on other input properties or using lumber materials or grades not covered by that standard.

1.4 Details of production, inspection, and certification are beyond the scope of this document. However, for test results to be representative of production, quality control systems shall be in place to ensure consistent quality. Manufacturing shall conform to recognized manufacturing standards such as ANSI A190.1 or CSA8201;O122.

1.5 Adjustments to characteristic values to determine reference values for design shall be in accordance with Practice D2915 for allowable stress design (ASD) or Specification D5457 for load and resistance factor design (LRFD).

1.6 Adjustments to ASD reference values for end-use conditions intended for design purposes shall be performed in accordance with Practice D3737. The same adjustment factors shall apply to LRFD reference values, except that the ASD load duration factor shall be replaced by an appropriate LRFD time effect factor as determined in accordance with recognized industry practice.

1.7 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

1.8 This standard does not purpo......

ASTM D7341-14 Referenced Document

• ANSI A190.1 Standard for wood products - Structural Glued Laminated Timber
• ASTM D198 Standard Test Methods of Static Tests of Lumber in Structural Sizes
• ASTM D245 Standard Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber
• ASTM D2915 Standard Practice for Evaluating Allowable Properties for Grades of Structural Lumber
• ASTM D3737 Standard Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)
• ASTM D4761 Standard Test Methods for Mechanical Properties of Lumber and Wood-Based Structural Materials
• ASTM D5456 Standard Specification for Evaluation of Structural Composite Lumber Products
• ASTM D5457 Standard Specification for Computing the Reference Resistance of Wood-Based Materials and Structural Connections for Load and Resistance Factor Design
• ASTM D6815 Standard Specification for Evaluation of Duration of Load and Creep Effects of Wood and Wood-Based Products
• CSA O122 Structural Glued-Laminated Timber Second Edition; General Instruction No 1 R(1999)

ASTM D7341-14 history

• 2021 ASTM D7341-21 Standard Practice for Establishing Characteristic Values for Flexural Properties of Structural Glued Laminated Timber by Full-Scale Testing
• 2014 ASTM D7341-14 Standard Practice for Establishing Characteristic Values for Flexural Properties of Structural Glued Laminated Timber by Full-Scale Testing
• 2009 ASTM D7341-09 Standard Practice for Establishing Characteristic Values for Flexural Properties of Structural Glued Laminated Timber by Full-Scale Testing
• 2008 ASTM D7341-08 Standard Practice for Establishing Characteristic Values for Flexural Properties of Structural Glued Laminated Timber by Full-Scale Testing