1.1 Scope of FprEN 1999-1-1
(1) FprEN 1999-1-1 gives basic design rules for structures made of wrought aluminium alloys and limited guidance for cast alloys (see Clause 5 and Annex C).
This document does not cover the following, unless otherwise explicitly stated in this document:

* components with material thickness less than 0,6 mm
* welded components with material thickness less than 1,5 mm
* connections with:
* steel bolts and pins with diameter less than 5 mm
* aluminium bolts and pins with diameter less than 8 mm
* rivets and thread forming screws with diameter less than 3,9 mm.
1.2 Assumptions
(1) In addition to the general assumptions of EN 1990 the following assumptions apply:
* execution complies with EN 1090-3 and EN 1090-5
* the mechanical properties comply with the product standards listed in 5.2.2.
(2) EN 1999 is intended to be used in conjunction with:
* European Standards for construction products relevant for aluminium structures
* EN 1090-1, Execution of steel structures and aluminium structures - Part 1: Requirements for conformity assessment of structural components
* EN 1090-3, Execution of steel structures and aluminium structures - Part 3: Technical requirements for aluminium structures
* EN 1090-5, Execution of steel structures and aluminium structures - Part 5: Technical requirements for cold-formed structural aluminium elements and cold-formed structures for roof, ceiling, floor and wall applications.