SIGN SUPPORT STRUCTURES (a) General Sign support structures shall be fabricated from steel sections which shall comply with the requirements of AS 1163, AS 3678 and AS 3679.1. Standards Signs support structures shall be standard round galvanised posts of 50, 65 or 80 mm nominal bore or purposedesigned steel structures as shown on the Drawings and manufactured in accordance with the requirements of AS . Size Splices in members shall be restricted to a maximum of one splice per member. Splices shall be full penetration butt welds. Splices All welding shall be as shown on the Drawings and in accordance with the requirements of AS 1554.1, Category GP. Welding Standard (b) Protective Treatment Except for standard galvanised posts, all steel components including brackets shall be protected by hotdip galvanising after all fabrication processes are completed. Hot-Dip Galvanising The steel components shall be finished by the hotdip galvanising process in accordance with to provide a minimum thickness of 100 microns and a bright finished surface free from white rust and stains. Finish Bolts, nuts and washers and brackets shall be galvanised in accordance with AS 1214. Bolts, Nuts etc. Splices in standard galvanised posts shall be painted by using a zincrich to provide a zincrich coating at least equal to the thickness specified for the galvanised layer. Splices Scratched and slightly damaged surfaces of galvanised coatings shall be renovated by using a zincrich to provide a zincrich coating at least equal to the thickness specified for the galvanised layer. This method of renovation shall be restricted to areas not exceeding 2500 square millimetres on any one structure. Any structure with totallydamaged coating areas exceeding 2500 square millimetres shall be regalvanised by the Contractor. Damaged Surfaces (c) Attachment of Signs Posts and other components shall be provided with the required sign attachment holes or fittings to suit the typical attachment systems as shown on the Drawings. Sign panels shall be attached to each supporting member at each extrusion section or bolthole in the sign panel. Typical Systems ERECTION OF NEW SIGNS SETTING OUT
(b) Bow < 0.5% of maximum dimension C262.05 (c) Butt gap in multi-piece sign < 1mm C262.05 (d) Rivet spacing in backing strip < 200mm C262.05 (e) Backing strip width >50mm C262.05 2. Extrusion Backing (a) Rivet Spacing <200mm C262.06 3. Background Paint (a) For matt coatings, gloss level >12% and <15% C262.08 (b) For gloss coatings, gloss level >85% and <95% C262.08 4. Reference Marking (a) Height of Coding >6mm and <10mm C262.11 5. Sign Support Structures (a) Protective Treatment thickness >100 microns C262.12b (b) Paint coating over Splices in standard galvanised posts >100 microns C262.12b (c) Damaged Surface of galvanised surfaces: (i) Coating with zinc rich paint Area <2500 sq. mm C262.12b (ii) Regalvanise Area >2500 sq. mm C262.12b 6. Clearing (a) Trees and Undergrowth to be cleared <3 metres from sign support structure C262.14 7. Concrete in Foundations of Sign SupportStructures (a) Strength >25 MPa at 28 days C262.15 ANNEXURE QUALITY CONTROL AND TESTING Activity Key Quality Verification Requirements Maximum Size Minimum Test Frequency Test Method MANDATORY TESTING