November 2016 External Works & Landscaping
Cullen Requires Protective Due To North Sea Location: be up to 40 years depending on the environment. The Engineers and Architects Guide to Hot Dip Galvanising states a life of 34 to 70 years depending on area. Our bridges are galvanised in accordance with BS 1461. This finish provides an economical option with minimal maintenance.
Galvanised and painted: To provide as less industrial look, a galvanised and then painted structure is sometimes specified, in accordance with series 1900. The same geometrical constraints apply as the galvanised only option and this is inherently more expensive as the structure is often required to be bolted together to facilitate the galvanising process- a more laborious fabrication- but loses the commercial advantage of a cheaper protective coating. Maintenance is similar to a painted structure as the paint coating requires minor and major maintenance, in a similar manner to a paint only solution.
Corten / Weathering Steel Weathering steel is a high strength low allow steel originally developed in the USA to resist corrosion
and was given the trade name Cor-ten. In suitable environments the steel forms an adherent protective rust patina that inhibits further corrosion. This type of finish is not suitable for bridges in coastal environments. It has very low maintenance requirements and is ideal where access for future maintenance is difficult or dangerous. Weathering steel material is more expensive that traditional mild steel, and it can only be sourced in flat plate meaning beams need to be fabricated rather than rolled. However the additional early expense may be offset by removal of painting requirements and significant reduction in maintenance costs. For more information on Weathering steel see www.steelconstruction.info/Weathering_steel. CTS Bridges employ both skilled joiners and fabricators and can therefore provide an extensive range of bridges in a variety of materials including steel and FRP or using a combination of steel, timber or FRP materials. Please contact us for more details on our design, build and installation service for bridges and structures on 01484 606416 or visit our website at www.ctsbridges.co.uk or by email enquiries@ctsbridges.co.uk
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01484 606416 enquiries@ctsbridges.co.uk www.ctsbridges.co.uk
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