Steel Buildings in Europe

Part 7: Model Construction Specification 7 - 29 11 ERECTION Section 9 of EN 1090-2 gives requirements for erection and other works undertaken on site including grouting of bases as well as those relevant to the suitability of the site for safe erection and for accurately prepared supports. Erection shall not commence until the site for the construction works complies with the technical requirements with respect to the safety of the works. Safety items related to site conditions are listed in § 9.2 of EN 1090-2. If the structural stability in the part-erected condition is not evident, a safe method of erection, on which the design was based, shall be provided. Items related to the design basis method of erection are listed in § 9.3.1 of EN 1090-2. A method statement describing the steelwork contractor's erection method shall be prepared and checked in accordance with design rules. The erection method statement shall describe procedures to be used to safely erect the steelwork and shall take into account the technical requirements regarding the safety of the works. The erection method statement shall address all relevant items in § 9.3.1 of EN 1090-2; additional items are listed in § 9.3.2 of EN 1090-2. Erection drawings or equivalent instructions, in accordance with the requirements of § 9.6.1 of EN 1090-2, shall be provided and form part of the erection method statement. Site measurements for the works shall be in accordance with the survey requirements of § 9.4 of EN 1090-2. The condition and location of the supports shall be checked visually and by appropriate measurement before the commencement of erection. If supports are unsuited to erection, they shall be corrected prior to the commencement of erection. Nonconformities shall be documented. All foundations, foundation bolts and other supports for the steelwork shall be suitably prepared to receive the steel structure. Installation of structural bearings shall comply with the requirements of EN 1337-11. Erection shall not commence until the location and levels of the supports, anchors or bearings comply with the acceptance criteria in § 11.2 of EN 1090-2, or an appropriate amendment to the specified requirements. If foundation bolts are to be pre-stressed, arrangements shall be made that the upper 100 mm of the bolt, as a minimum, has no adhesion to the concrete. Foundation bolts intended to move in sleeves shall be provided with sleeves three times the diameter of the bolt, with a minimum of 75 mm. Whilst erection is proceeding, the supports for the steelwork shall be maintained in an equivalent condition to their condition at the commencement of erection.