The world of hot dip galvanizing around us - hdgasa

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Bridges Pedestrian bridges Bisi Pedestrian Bridge (Umzimkulu KwaZulu Natal) Situated in an area that is not easily accessible by ordinary vehicles, the bridge was designed and constructed as a safe, durable and maintenance free crossing for the local rural population. Estimated maintenance free service life in excess of 80 years. Bisi Pedestrian Bridge. 20 Hot Dip Galvanizing Today Volume 8 Issue 4 2011 Makanise Bridge (known as Pongola Bridge) This project takes advantage of the corrosion control properties of hot dip galvanizing within an inland rural society classified, in terms of ISO 9223, as a C2 environment with an estimated maintenance free service life in excess of 80 years. Century City Bridge. Graceland Bridge. Transnet Pedestrian Bridges. Makanise Bridge. Century City (Cape Town) Hot dip galvanized and painted - Duplex System. Corrosion control was designed to combat a severe marine environment and provide an estimated service life in excess of 30 years.
Vaalbank Pedestrian Bridge. Zwelitsha Pedestrian Bridge. Graceland Bridge (Keat’s Drift area of KwaZulu Natal) A rural community in the Keat’s Drift area found themselves cut off from amenities when their wooden access bridge across the Mooi River was destroyed by floodwaters. The local rural community were forced on a 10km detour to reach trading stores on the southern bank of the river. The KZN Department of Transport’s Rural Road Transport Forum Initiative together with the affected community identified the desperate need and a new 90 meter span Hybrid Suspension and Truss Bridge was constructed. Transnet Pedestrian Bridges (Richards Bay) Approximately 300m from the sea and 80m from a fertiliser bagging facility representing a severe corrosive environment with a design imperative to protect these structure with a reliable, maintenance free protection system hot dip galvanizing plus a top paint system (Duplex system) was chosen for its proven corrosion control characteristics with an estimated service life in excess of 25 years. Vaalbank Pedestrian Bridge (Dannhauser KwaZulu Natal) A 54 meter span by 3 meter wide truss type structure was used to obviate the need to locate piers within the loose sandy riverbed. The construction of the structure shortened the route during the rainy season that school children and other villagers had to travel to essential services. Hot dip galvanizing was chosen by the engineers for corrosion control of the bridge because of “it’s build and forget” characteristics particularly when located in remote inland areas. Zwelitsha Pedestrian Bridge (over the Buffalo River) The Zwelitsha Pedestrian Bridge crosses the Buffalo River in a rural area of the Eastern Cape. Commissioned by the Buffalo City Municipality in Bridges response to tragic drowning incidents, the bridge provides a safe river crossing to some 500 pedestrians per day, linking the rural communities with essential services, including schools and clinics. Corrosion design specifications were for a Duplex system to combat a marine environment and ensure a maintenance free service life in excess of 40 years. Volume 8 Issue 4 2011 Hot Dip Galvanizing Today 21
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