EN 1999 (1)P EN 1999 applies to the design of buildings and civil engineering and structural works in aluminium. It complies with the principles and requirements for the safety and serviceability of structures, the basis of their design and verification that are given in EN 1990 - Basis of structural design. (2) EN 1999 is only concerned with requirements for resistance, serviceability, durability and fire resistance of aluminium structures. Other requirements, e. g. concerning thermal or sound insulation, are not considered. (3) EN 1999 is intended to be used in conjunction with: EN 1990 "Basis of structural design"; EN 1991 "Actions on structures"; European Standards construction products relevant for aluminium structures; EN 1090-1: Execution of steel structures and aluminium structures - Part 1: Requirements for conformity assessment of structural components5; EN 1090-3: Execution of steel structures and aluminium structures - Part 3: Technical requirements for aluminium structures5 (4) EN 1999 is subdivided in five parts: EN 1999-1-1 Design of Aluminium Structures: General structural rules. EN 1999-1-2 Design of Aluminium Structures: Structural fire design. EN 1999-1-3 Design of Aluminium Structures: Structures susceptible to fatigue. EN 1999-1-4 Design of Aluminium Structures: Cold-formed structural sheeting. EN 1999-1-5 Design of Aluminium Structures: Shell structures. EN 1999-1-4 (1)P EN 1999-1-4 gives design requirements for cold-formed trapezoidal aluminium sheeting. It applies to cold-formed aluminium products made from hot rolled or cold rolled sheet or strip that have been cold-formed by such processes as cold-rolled forming or press-breaking. The execution of aluminium structures made of cold-formed sheeting is covered in EN 1090-3. NOTE The rules in this part complement the rules in other parts of EN 1999-1. (2) Methods are also given for stressed-skin design using aluminium sheeting as a structural diaphragm. (3) This part does not apply to cold-formed aluminium profiles like C-, Z- etc profiles nor cold-formed and welded circular or rectangular hollow sections. (4) EN 1999-1-4 gives methods for design by calculation and for design assisted by testing. The methods for the design by calculation apply only within stated ranges of material properties and geometrical properties for which sufficient experience and test evidence is available. These limitations do not apply to design by testing. (5) EN 1999-1-4 does not cover load arrangement for loads during execution and maintenance. 5 To be published