Minimum fire resistance for structural elements

An element of structure and those other components of the building given in Table 4.1 should have a minimum period of fire resistance of not less than that given in Tables 4.1 and 4.2 for the purpose group of the building. Where one element of structure or other component supports, carries or gives stability to another, the fire resistance of the supporting element or component should be not less than the minimum period of fire resistance for the other element (whether that other element is loadbearing or not). Where an element or structure or other component forms part of more than one building or compartment, the fire resistance of that element or component should be not less than the greater of the relevant provisions.