Steel Buildings in Europe

Part 7: Model Construction Specification 7 - 36 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 Clauses 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 multi--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) Clauses 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.