This European Standard defines the requirements for the manufacture of thin gauge cold formed elements, the execution of structures made from such elements (e.g. roofs, coverings, walls, floors, ceilings) under predominately static loading conditions and their documentation. It does cover products of construction class I and II according to EN 1999 1 4 used in structures. Thin gauge structural elements are understood here to mean profiled sheeting, such as trapezoidal, sinusoidal, liner trays or cassette profiles (Figure 1) or linear profile cross sections, (Figure 2), that are produced by cold forming and have thicknesses not greater than 4 mm. Closed build up sections of thicknesses not greater than 3 mm, as defined in EN 1999 1 1 and 4 are also covered by this part. Perforated and micro profiled sheeting are also covered by this part. For closed build up sections (Figure 2b) of thicknesses greater than 3 mm the execution provisions of EN 1090 3 apply. Welded sections are excluded from this part and are covered by EN 1090 3. This European Standard also covers spacer constructions between the outer and inner or upper and lower skins as well as supporting members for roofs, walls and ceilings made from cold formed profiled sheeting and the connections and attachments of the afore mentioned elements as long as they are involved in load transfer. This European Standard combined with EN 1090-4 covers combined steel and aluminium structural elements, e.g. liner trays made of steel, stiffened by profiles made of aluminium. Other composite structural elements where the interaction between dissimilar materials are an integral part of the structural behaviour such as sandwich panels and composite floors are not covered by this standard. NOTE 1 The structures covered in this standard can be for example ¾ð single or multi skin roofs, whereby the load bearing structure (lower skin) as well as the actual roof covering (upper skin) or both consist of thin gauge structural elements, ¾ð single or multi skin walls whereby the load bearing structure (inner skin) as well as the actual cladding (outer skin) or both consist of thin gauge structural elements, or ¾ð suspended ceilings for interior fitting or coverage of tunnels.