Get Adobe Flash player
1.2.4 Consumables Consumables for use in metal arc welding shall comply with BS EN ISO 14341, BS EN ISO 2560, BS EN 756, BS EN 757 and BS EN 760 as appropriate. 1.2.5 Structural Fasteners Structural fasteners shall be in accordance with the following standards: • • • • • • • • 1.2.6 Shop and site bolts and nuts in ordinary bolt assemblies shall be grade 4.6 in accordance with BS 4190 or grade 8.8 or 10.9 in accordance with BS 3692 but with dimensions, tolerance and threaded length to BS 4190. High strength friction grip (HSFG) bolt assemblies shall be in accordance with BS 4395: Part 2. Stainless steel bolts, screws, studs and nuts shall be grade A4-80 to BS EN ISO 3506 unless specified otherwise. Holding down bolts in foundations shall be in accordance with BS 7419. Cup and countersunk bolts shall be in accordance with BS 4933. Metal washers shall be made in accordance with BS 4320 Section 2 and unless otherwise specified shall be black steel washers to Form E. All lock nuts shall be in accordance with BS EN ISO 2320 and BS EN ISO 7042 or BS EN ISO 7719 as appropriate. Where specific coatings are required to fasteners they shall be provided by the fastener manufacturer and submitted to the Engineer for approval. Shear Studs Proprietary shear studs used in composite construction shall be in accordance with BS 5950: Part 3.1 and shall be the headed type with the following properties after being formed: • • • 1.2.7 2 Minimum yield strength 350 N/mm 2 Minimum ultimate tensile strength 450 N/mm At yield elongation of 15% on a 5.65√S o gauge length, as given in BS EN 1002: Part 1. Protective Treatments Protective treatment materials shall comply with the requirements of the following standards: • • • • • 1.2.8 Chilled iron shot and grit for blast cleaning shall be in accordance with BS EN ISO 11124. Surface coatings shall be in accordance with the guidance given in BS EN ISO 12944, BS EN ISO 14713 and/or specialist advice. Sherardized coatings shall be in accordance with BS 4921. Composition of zinc in galvanizing baths shall be in accordance with BS EN ISO 1461. Lightweight gauge metalwork shall be galvanized by the hot-dip process as specified in BS 3083 or BS EN 10143. Surface Condition The surface condition of steel for fabrication shall be in accordance with the following standards: • Steel surfaces when used shall not be more heavily pitted or rusted than Grade C of BS EN ISO 8501: Part 1. Page 6