BS EN 15416-4:2025

This document specifies a laboratory method of determining the open assembly time under referenced conditions in standard climate (20 ± 2) °C and (65 ± 5) % relative humidity (hereafter climate [20/65]).

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