ASTM-D7469 2009

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D7469-09 Standard Test Methods for End-Joints in Structural Wood Products

Published By	Publication Date	Number of Pages
ASTM	2009	14

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Categories: 91.080.20 - Timber structures, ASTM

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Description

1.1 This standard provides test methods for evaluating the structural capacity and integrity of end-joints in structural wood products.

1.2 End-joints are manufactured by adhesive bonding of machined, mated surfaces at the ends of two pieces of lumber to form a joint. Typical end-joint configurations include finger joints and scarf joints. The combination of one or more end-joints and the adjoining sections of the structural wood product within the assembly is considered to be the test specimen.

1.3 Off-line test methods include: (1) Axial Tension, (2) Bending, and (3) Cyclic Delamination.

1.4 In-line test methods include: (1) Tension Proofload and (2) Bending Proofload.

1.5 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.

1.6 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.

5.1 This test method provides procedures for the determination of the axial tensile capacity of full-size end-joint specimen off-line.

5.2 Applications of this test method include: end-joint qualification and daily quality control of production, and other purposes where the strength of a full-size end-joint must be verified or determined.

10.1 This test method provides off-line test procedures for the determination of the capacity of the end-joint in bending on short spans subjected to a 4-point loading.

10.2 Applications of this test method include: end-joint qualification and daily quality control, and other purposes where the strength of a full-size end-joint are to be verified or determined.

15.1 This test method provides procedures for assessing the ability of the bond to resist separation after repeated exposure to moisture and drying. This test method is for end-joints in products requiring evaluation of durability, and also provides an indication of the overall consistency of the end-joint manufacturing process.

Note 9This is adopted from Test Methods D1101 , Test Method B, for finger joints.

21.1 This test method provides an in-line quality assurance procedure for end-joint strength.

21.2 This method does not provide sufficient means to fully characterize the strength parameters of a population or sample of end-joints, and is not intended to be a substitute for off-line process qualification and on-going quality control testing.

21.3 This method reduces the variability of the lower end of strength distribution by culling low-strength end-joints.

Note 17Although this method improves the structural reliability, it does not necessarily provide absolute assurance those end-joints proofloaded to a specified test level will not fail when reloaded to the same tension stress level.

Note 18In a continuous end joining process, end-joints may occasionally appear in the grips. Provided this is a random occurrence, the application is still considered to meet the requirements of this method.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Significance and Use FIG. 1
3	Scope Summary of Test Method Apparatus Test Specimens and Conditioning Procedure FIG. 2
4	Scope Summary of Test Method Apparatus Test Specimens and Conditioning Procedure
5	Scope Summary of Test Method Apparatus Test Specimens and Conditioning Procedure
6	Measurements and Calculation Scope Summary of Test Method Apparatus
7	Test Specimens and Conditioning Procedure Report
8	Precision and Bias Keywords A1. FAILURE MODE CLASSIFICATION OF TESTED SPECIMENS A1.1 A1.2
9	X1. GUIDELINES FOR PRODUCT QUALIFICATION AND QUALITY CONTROL X1.1 Sample Sizes X1.2 Effect of Test Mode on Capacity and Modes of Failure FIG. A1.1
10	X1.3 Recommended Tests and Frequency of Testing X1.4 Optional Tests and Characteristics for Monitoring X1.5 Proofloading
11	X2. FACTORS AFFECTING JOINT PERFORMANCE X2.1 Joint Profile and Orientation X2.2 Wood Adhesive X2.3 Wood Moisture Content
12	X3. PRODUCT AND JOINT PERFORMANCE LEVELS X3.1 Considerations X4. DURABILITY AND DELAMINATION CONDITIONING X4.1 Considerations X4.2 Durability Conditioning and Testing X4.3 Delamination Conditioning and Testing X5. REDUCED CROSS-SECTION TEST SPECIMENS X5.1 Considerations
13	X5.2 Guidelines X6. ADHESIVES X6.1 Exterior Exposure X6.2 Other Exposure Conditions X6.3 Applicability to End-Joints
14	X6.4 Adhesive Specifications and Test Standards X7. COMMENTARY TO THE TEXT X7.1 Scope X7.2 Limitations to the Applicability of This Test Method X7.3 References Considered

Additional information

Standard Title	D7469-09 Standard Test Methods for End-Joints in Structural Wood Products
Published Code	ASTM
Publication Date	2009
Pages Count	14
ICS Codes	91.080.20 - Timber structures

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