Steel Buildings in Europe

Part 7: Model Construction Specification 7 - 17 With reference to Annex A1.4 of EN 1990, limits for vertical deflections according to Figure A1.1, for horizontal deflections according to Figure A1.2 and for vibrations of structures on which the public can walk, shall be specified in the contract documents and agreed with the Client. 5.2 Design of joints – EN 1993-1-8 EN 1993-1-8 gives design methods for the design of joints subject to predominantly static loading using steel grades S235, S275, S355 and S460. National choice is allowed through clauses listed in the Foreword to EN 1993-1-8. Additional contract document requirements According to § 3.4.1 of EN 1993-1-8, the Category of bolted connections (Category A, B or C for joints loaded in shear, and Category D or E for joints loaded in tension) shall be specified in the contract documents. According to § 3.9 of EN 1993-1-8, the contract documents shall specify the class of friction surfaces for slip-resistant connections using pre-loaded 8.8 or 10.9 bolts. According to § 4.1 of EN 1993-1-8, the contract documents shall specify the quality level of welds according to EN ISO 25817. The frequency of inspection of welds shall be specified in the contract documents and shall conform to the requirements of EN 1090-2. 5.3 Material toughness and through-thickness properties – EN 1993-1-10 EN 1993-1-10 contains design guidance for the selection of steel for fracture toughness and for through-thickness properties of welded elements where there is a significant risk of lamellar tearing during fabrication, for constructions executed in accordance with EN 1090-2. The guidance given in Section 2 of EN 1993-1-10 shall be used for the selection of material for new construction. The rules shall be used to select a suitable steel grade from the European Standards for steel products listed in EN 1993-1-1. The choice of Quality Class shall be selected from Table 3.1 EN 1993-1-10 depending on the consequences of lamellar tearing. 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.