Locations where high-performance materials are required Class R3B , and this is recognised in the classes recommended in the UK National Annex to BS EN 12899-1:2007 (with Corrigendum 31.10.11): But it is the performance, not the underlying technology, that is important to the sign specifier Retroreflectivity is achieved either by incorporating glass beads into the material, or by moulding tiny prisms into the plastic, and are therefore known as glass bead or microprismatic sheetings. Signs intended only for pedestrians or mounted parallel to the kerb line do not generally need to be reflective, as they are unlikely to be illuminated by vehicle headlamps. Modern traffic signs are faced with a long-lasting vinyl material that is usually retroreflective. If you are specifying a sign to be erected by someone other than its manufacturer, you might want to stipulate that a large sign should be made in modules, for ease of handling and erection. The back of a sign will generally be grey, but TSRGD (Direction 42) also allows you to specify black. The cost of Zintec is considerably cheaper than other materials and as such is the most commonly used substrate for our road work temporary frame signs. This coating protects the sign from corrosion and will last longer than standard steel. Zintec is electro-zinc coated steel sheet. Traffic grade composite sheets differ from otherĬomposites by having a saline-resistant bonding agent that resists road salt. Theft and less affected by price fluctuations. Similar structural support to solid aluminium sheet, but is lighter in weight, less susceptible to This provides excellent structural support, but you might also wish to consider:Ĭomposite material has an LDPE (polyethylene) core between aluminium skins. Unless you specify otherwise, a sign will usually be made of 3 mm (11 gauge) aluminium alloy, stiffened by aluminium channels affixed to the back. To make the sign easier to handle and mount.For reasons of economy, particularly for temporary signs.To minimise the scrap value and therefore the likelihood of theft.There are sometimes good reasons why you might want to choose a particular type of material for the sign substrate: Says nothing about what material it should be made from. The traffic signs standard gives the stiffness required of a traffic sign but, as a performance standard,
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