Steel Buildings in Europe

Part 10: Model Construction Specification 10 - 15 The Hoisting Class (HC1 to HC4) of the crane shall be specified in the contract documents, unless it is specified in the crane supplier specification. Reference can be made to Annex B (informative) of EN 1991-3. According to § 2.9.1(1) of EN 1991-3, the contract documents shall specify the vertical load to be applied to access walkways, stairs and platform. Otherwise, provisions given in § 2.9.1(2), 2.9.1(3) or 2.9.1(4) shall apply. According to § 2.9.2(1) of EN 1991-3, the contract documents shall specify the horizontal load to be applied to the guard rail. Otherwise, provisions given in § 2.9.2(1) or 2.9.2(2) shall apply. To make allowance of relevant accidental actions, the contract documents shall specify:  Whether buffers are used or not  Whether or not a crane with horizontally restrained loads can tilt when its load or lifting attachment collides with an obstacle. To make allowance for fatigue effects, the contract documents shall provide sufficient information on the operational conditions; the fatigue loads can then be determined according to EN 13001 and Annex A of EN 1993-1-9. Otherwise, provisions of § 2.12 of EN 1991-3 apply. Where a simplified approach for determining the fatigue loads is favoured in the contract documents, the latter shall specify:  the class of load spectrum ( Q 0 to Q 5 ) for all tasks of the crane  the class of total number of working cycles ( U 0 to U 9 ) during the design life of the crane  the crane classification ( S 0 to S 9 ). If the crane classification is not included in the crane supplier specification, reference can be made to Annex B (informative) of EN 1991-3. According to § A.3.2(1) of the normative Annex A of EN 1991-3, the contract documents shall specify the partial factor for actions on crane supporting structures to be used in serviceability limit states. Otherwise, this partial factor shall be taken as 1,0. 4.8 Seismic actions EN 1998-1 applies to the design and construction of buildings and civil engineering works in seismic regions. Its purpose is to ensure that in the event of earthquakes:  Human lives are protected  Damage is limited  Structures important for civil protection remain operational (special structures such as nuclear power plants, offshore structures and large dams, are beyond the scope of EN 1998-1).