ASTM D4688-99(2013)

4.1 This test method is specifically designed to measure the performance of adhesives in finger joints manufactured under production line conditions.

4.2 The results of the test method may be used to certify an adhesive as suitable for finger jointing lumber under production-line conditions where the intended end use of the finger jointed lumber will be in a structural glued laminated timber. When the test results are to be used for certification of an adhesive for this purpose, use a standard wood species and a standard finger profile. Standard species may be found in Table 1 of Specification D2559. Two standard finger profiles commonly used in the manufacture of structural glued laminated timber industry are shown in Fig. 1.³

4.3 This test method is not intended for quality control as the test assemblies are selected for their absence of defects usually found in run-of-the-mill lumber and finger joints.

1.1 This test method is designed to evaluate adhesives for finger jointing lumber used in the manufacture of structural glued laminated timber. It tests the tensile strength of joints under the following treatments; dry with no treatment, wet after one vacuum-pressure soak treatment, and wet after cyclic boil-dry treatment.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 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.