1.1 Scope of EN 1999-1-3(1) This document gives the basis for the design of aluminium alloy structures subject to fatigue in the ultimate limit state.(2) This document gives rules for:- safe life design;- damage tolerant design;- design assisted by testing.(3) This document does not cover pressurized containment vessels or pipework.1.2 Assumptions(1) The general assumptions of EN 1990 apply.(2) The provisions of EN 1999-1-1 apply.(3) EN 1999-1-3 is intended to be used in conjunction with EN 1990, EN 1991 (all parts), relevant parts in EN 1992 to EN 1999, EN 1090-1 and EN 1090-3 for requirements for execution, and ENs, EADs and ETAs for construction products relevant to aluminium structures.