3.1 The approach adopted for testing of load-bearing
fire-resisting divisions having a structural metal core (steel or
aluminium) should follow the requirements for testing “A" class
divisions in resolution A.754(18) where
relevant and appropriate.
3.2 If the structural core is of aluminium, the
average temperature of the structural core should not rise more than
200°C above its initial temperature at any time within the classification
period (see 1.4).