BS EN 15416-5:2017

What is BS EN 15416-5 - Minimum pressing time about ?

BS EN 15416-5 is the fifth part of an international standard on adhesives for load bearing timber structures.  

BS EN 15416-5 specifies a laboratory method of determining the minimum pressing time for two glue line thicknesses, close contact and 0,2 mm or 0,3 mm, at three temperatures and three wood moisture contents.  

Note: The method gives a result that cannot be applied to the safe manufacture of timber structures without taking into account the influence in variation of factors such as timber density, moisture content, factory temperature and relative air humidity. 

Who is BS EN 15416-5 - Minimum pressing time for ?

BS EN 15416-5 on adhesives for load bearing timber structures is useful for: 

• Builders wooden houses and structures 
• Civil engineers 
• Scientific laboratories  

Why should you use BS EN 15416-5 - Minimum pressing time ?

BS EN 15416-5 best practice guidance can help you in testing the standard beech lap joints. These standard beech lap joints are tested in tensile shear after various curing times. This results in achieving the tensile shear strength at a given temperature. With the help of BS EN 15416-5, you can calculate the tensile shear strength of adhesives for load bearing timber structures.  

BS EN 15416-5 specifies the test method and test procedure that is useful in determining the minimum pressing time using a defined procedure on adhesives. This test method helps in obtaining a reliable base for the comparison of minimum pressing time between adhesives under referenced conditions and produce better quality products.  

What’s changed since the last update ?  

BS EN 15416-5:2017 supersedes BS EN 15416-5:2006. BS EN 15416-5:2017 includes some technical changes with respect to BS EN 15416-5:2006. These include: 

• Application for EPI adhesives according to EN 16254 has been added 
• The pressing times are determined for both close contact glue line and 0,3 mm thick glue line when testing PUR adhesives (EN 15425) and EPI adhesives in category “General purpose” (EN 16254), and close contact glue line and 0,2 mm thick glue for EPI adhesives designed for category “Small dimensions” (EN 16254) 
• Some parts of this European Standard are made in line with EN 302-6:2013 
• Some of the wording in EN 302-1:2013 have been used to describe how to evaluate and report % wood failure (fibre failure) in the tested test pieces 
• It is stated that the glue application shall be done at the temperature used for conditioning and pressing of the material. When screening tests are performed, the material may, however, be removed from the test temperature for glue application
• Measurement and reporting of glue line thickness has been deleted