Steel Buildings in Europe

Part 7: Model Construction Specification 7 - 9 3 BASIS OF STRUCTURAL DESIGN EN 1990 establishes the Principles and Requirements for safety, serviceability and durability of structures, describes the basis for their design and verification and gives guidelines for related aspects of structural reliability. For the design of new structures, EN 1990 is intended to be used, for direct application, together with Eurocodes EN 1991 to 1999. EN 1990 is applicable for the structural appraisal of existing construction, in developing the design of repairs and alterations or in assessing changes of use. Design of steel structures shall conform to the basic requirements of § 2.1 of EN 1990. Reliability, durability and quality management shall conform to § 2.2, § 2.4 and § 2.5 of EN 1990. National choice is allowed through clauses listed in the Foreword to EN 1990. 3.1 General assumptions according to EN 1990  The choice of structural system and the design of the structure is made by appropriately qualified and experienced personnel  Execution is carried out by personnel having the appropriate skill and experience  Adequate supervision and quality control is provided during the execution of the work, i.e. in design offices, factories, plants and on site  The construction materials and products are used as specified in EN 1990 or in the relevant execution standards or reference material or product specifications  The structure will be adequately maintained  The structure will be used in accordance with the design assumptions. Additional contract document requirements According to § 2.1(4)P of EN 1990, relevant additional specific events (impact, explosion, etc.), defined by the Client and the relevant authority, must be taken into account in the design and the execution of a structure. According to § 2.3 of EN 1990, the contract documents should specify the design working life of the structure. According to § 3.3(2) of EN 1990, the contract documents should state any relevant additional specific circumstances where the limit states that concern the protection of the contents are to classified as ultimate limit states. According to § 3.4(1) of EN 1990, the contract documents shall specify the serviceability requirements of the project.