Steel Buildings in Europe

Part 10: Model Construction Specification 10 - 38 Proposed Clauses Commentary 3 BASIS OF STRUCTURAL DESIGN 3.1 Design of steel structures shall conform to the basic requirements of § 2.1 of EN 1990. 3.2 Reliability, durability and quality management shall conform to § 2.2, 2.4 and 2.5 of EN 1990. 3.3 The following additional specific events shall be taken into account for the design and the execution of the structure: (insert list) § 2.1(4) of EN 1990. 3.4 The design working life of the structure shall be equal to ... years. § 2.3 of EN 1990. For the specification of the intended design working life of a permanent building, see Table 2.1 of EN 1990. A working life of 50 years will provide adequate durability for common single-storey buildings. 3.5 For the following additional specific circumstances, the limit states that concern the protection of the contents shall be classified as ultimate limit states: (insert list) § 3.3(2) of EN 1990. 3.6 The serviceability requirements of the project shall be as follows: (insert requirements) § 3.4(1) of EN 1990. 4. ACTIONS ON STRUCTURES 4.1 Self-weight and imposed loads 4.1.1 The following imposed loads shall be considered for serviceability limit state verifications: (insert list) § 3.3.2(4) of EN 1991-1-1. In accordance with the service conditions and the requirements concerning the performance of the structure. 4.1.2 The characteristic values of densities of construction and stored materials shall be taken as follows: (insert list) § 4.1(1) and 4.1(2) of EN 1991-1-1. Especially for materials which are not covered by the Tables in Annex A of EN 1991-1-1. 4.1.3 Loads of heavy equipments shall be as specified on the relevant drawings. § 6.1(4) of EN 1991-1-1. e.g. in communal kitchens, radiology rooms, boiler rooms, etc. 4.2 Snow loads 4.2.1 In the following circumstances, tests and proven and/or properly validated numerical methods may be used to obtain snow loads on the construction works: (insert particular circumstances, if any) § 1.5 of EN 1991-1-3. These circumstances should be agreed upon with the Client and the relevant authority. 4.2.2 Particular snow loads shall comply with the following requirements: (insert special requirements, if any) § 4.1(1) of EN 1991-1-3. To cover unusual local conditions, the National Annex may additionally allow the Client and the relevant authority to agree upon different characteristic values of snow load.