Steel Buildings in Europe

Part 7: Model Construction Specification 7 - 28 10 MECHANICAL FASTENING Section 8 of EN 1090-2 covers requirements for shop and site fastening, including the fixing of profiled sheeting; it refers to bolting assemblies consisting of matching bolts, nuts and washers (as necessary). Contract documents shall specify if, in addition to tightening, other measures or means are to be used to secure the nuts. Minimum nominal fastener diameter, bolt length, length of protrusion, length of the unthreaded bolt shaft and clamp length shall comply with the requirements of § 8.2.2 of EN 1090-2. Requirements given in § 8.2.3 of EN 1090-2 for washers shall apply. Tightening of non-preloaded bolts shall comply with the requirements of § 8.3 of EN 1090-2. Precautions and preparation of contact surfaces in slip resistant connections shall comply with the requirements of § 8.4 and Table 18 of EN 1090-2. Slip factor shall be determined by test as specified in Annex G of EN 1090-2. Tightening methods of preloaded bolts shall comply with the requirements of § 8.5 of EN 1090-2, and shall be specified in the contract documents.