BS EN 302-4:2023 PDF

Scope: 1 Scope This document specifies a method for determining the influence of shear strength in crosswise gluing by wood shrinkage under drying conditions. It is applicable for the following applications: a) for assessing the compliance of adhesives with EN 301, EN 15425, EN 16254, EN 17334 and EN 17418; b) for assessing the suitability and quality of adhesives for load-bearing timber structures; c) for determining if the adhesive is capable of withstanding stresses due to wood shrinkage without unacceptable loss of strength. This test is intended primarily to obtain performance data for the classification of adhesives for load-bearing timber structures according to their suitability for use in defined climatic environments. This test is carried out on Norway spruce ( Picea abies L.). This method is not intended to provide data for structural design and does not necessarily represent the performance of the bonded member in service.

BS EN 302-4:2023 Referenced Document

EN 13183-1 Moisture content of a piece of sawn timber - Part 1: Determination by oven dry method
EN 301 Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification and performance requirements
ISO 5893 Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of traverse) — Specification — Amendment 1
ISO 6344-2 Coated abrasives — Determination and designation of grain size distribution — Part 2: Macrogrit sizes P12 to P220

2023 BS EN 302-4:2023 Adhesives for load-bearing timber structures. Test methods. Determination of the effects of wood shrinkage on the shear strength
2013 BS EN 302-4:2013 Adhesives for load-bearing timber structures. Test methods. Determination of the effects of wood shrinkage on the shear strength
2004 BS EN 302-4:2004 Adhesives for load-bearing timber structures - Test methods - Determination of the effects of wood shrinkage on the shear strength