Steel Buildings in Europe

Part 10: Model Construction Specification 10 - 20 Depending on the Quality Class selected from Table 3.1, either:  through thickness properties for the steel material shall be specified from EN 10164, or  post-fabrication inspection shall be used to identify whether lamellar tearing has occurred. Guidance on the avoidance of lamellar tearing during welding is given in EN 1011-2. National choice is allowed through clauses listed in the Foreword to EN 1993-1-10. 5.7 Crane supporting structures – EN 1993-6 EN 1993-6 provides design rules for the structural design of runway beams and other crane supporting structures. It covers overhead crane runways inside buildings and outdoor crane runways for:  Overhead travelling cranes, either: - supported on top of the runway beams or - underslung below the runway beams  Monorail hoist blocks. National choice is allowed through clauses listed in the Foreword to EN 1993-6. Additional contract document requirements According to § 2.1.3.2(2) of EN 1993-6, the design working life of temporary crane supporting structures shall be agreed with the Client and the Public Authority, taking account of possible re-use. According to § 4(3) of EN 1993-6, where crane rails are assumed to contribute to the strength or stiffness of a runway beam, contract documents shall specify the appropriate allowances for wear to be made in determining the properties of the combined cross-section. According to § 4(4) of EN 1993-6, where actions from soil subsidence or seismic actions are expected, tolerances for vertical and horizontal imposed deformations shall be specified in the contract documents, agreed with the crane supplier, and included in the inspection and maintenance plans. According to § 7.3(1) of EN 1993-6, the specific limits for deformations and displacements, together with the serviceability load combinations under which they apply, shall be specified in the contract documents for each project.