1 Scope
1.1 Scope of EN 1999‑1‑2
-
(1) This document deals with the design of aluminium structures for the accidental situation of fire exposure and is intended to be used in conjunction with EN 1999‑1‑1, EN 1999‑1‑3, EN 1999‑1‑4 and EN 1999‑1‑5. This document only identifies differences from, or supplements to, normal temperature design.
-
(2) This document applies to aluminium structures required to fulfil a load bearing function.
-
(3) This document gives principles and application rules for the design of structures for specified requirements in respect of the aforementioned function and the levels of performance.
-
(4) This document applies to structures, or parts of structures, that are within the scope of EN 1999‑1‑1 and are designed accordingly.
-
(5) The methods given in this document are applicable to the following aluminium alloys:
EN AW-3004 – H34 EN AW-5083 – O and H12 EN AW-6063 – T5 and T6 EN AW-5005 – O and H34 EN AW-5454 – O and H34 EN AW-6082 – T4 and T6 EN AW-5052 – H34 EN AW-6061 – T6 -
(6) The methods given in this document are applicable also to other aluminium alloy/tempers of EN 1999‑1‑1, provided that either all necessary information on properties at elevated temperatures are available or the simplified assumptions in 5.2.1 are applied.
The second generation of EN Eurocode standards is expected to be published between 2023 and 2026. These documents are being published as soon as they are available, to enable users to prepare for the transition from the first generation to second generation of Eurocodes. As set out in the National foreword of the BS EN second generation Eurocodes, UK adoptions of the first generation of Eurocodes will be withdrawn by BSI on 30 March 2028. That means there is a period of coexistence between 2023 and 2028 during which both first and second generation Eurocodes are available.
Until 30 March 2028, the first generation documents should be considered as the applicable standards for buildings and civil engineering works constructed in the UK unless otherwise specified by the relevant authority or in the specification for a particular project. While the use of provisions in second generation Eurocodes in conjunction with first generation Eurocodes is not precluded, it should be undertaken with care and should only be done when users are satisfied that it will not result in a lower level of reliability than the minimum level set in the first generation Eurocodes and associated UK National Annexes.