Waldren Bridges

Belbourie Bridge

The tall tubular bent columns for this bridge were inspired by the principles of tubular steel furniture applied to large steel pipes using induction bending techniques developed for pipework for the water, oil and gas industry…
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Breakaway Bridge, Acheron River

A badly deteriorated timber deck, badly deteriorated timber piles, only the steel girders remained serviceable. Could this bridge be rehabilitated? As it was the only access for local residents, businesses, and tourists, would it take long? Since the Shire had limited resources could the cost be kept to a minimum? Fortunately the answers were: yes, yes, and yes…
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Bridge Kits

A complete bridge is on its way to a site deep in a NSW forest. As well as the steel girders & crossbracing, deck slabs, rubber pads and fixings, the kit includes a pair of steel mesh abutment cages. On arrival at site the components can be lifted into place and bolted together in a few hours, no welding is needed…
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Ditchfield Bridge

Just another low level bridge that you’d hardly notice. The interesting aspect of this bridge is that it was designed so that it could be constructed within the 20 metre wide road reserve whilst maintaining two-way traffic through the site. Normally a side track is constructed, and though quite straightforward on this site, the track would encroach beyond the road reserve and hence require a full Environmental Impact Statement to be prepared, at great expense and months of delay…
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Foot Bridge

All steelwork for this cycle and footbridge was completely assembled prior to lifting it into position on the concrete footings…
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Gregadoo Bridge

This was the first of more than 15 bridges designed and constructed by Waldren Bridges using reinforced earth abutments…
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Precast Dam

Initially, this structure was to be a Waldren Bridgette precast concrete modular bridge separate to the irrigation dam and flow regulator. Discussions between irrigation authority engineers and Rob Wallace resulted in a combined design whereby the precast concrete support and abutment walls also fulfilled the regulator functions…
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Quikdek

Waldren Bridges Pty Ltd began by building farm bridges in rural Victoria and NSW, using steel girders and simple precast concrete deck slabs. Before long we were approached by several municipal engineers seeking to re-deck road bridges. Typically these had a badly deteriorated deck, but the sub-structure was quite sound. Replacement of the deck gave existing bridges a new lease of life for a fraction of the cost of a new bridge…
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Recycled Steel

Once a warehouse, now a bridge. Following an approach by a client who had acquired a sizeable quantity of steelwork from a demolished warehouse, Waldren Bridges produced a design maximizing the use of the second-hand steel for this 9 span bridge…
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Retro Foot Bridge

Curved steel lattice girders impart a graceful, slender appearance to this bridge over the Ovens River. Nevertheless the girders have sufficient strength to carry crowds of pedestrians plus heavy cement-lined sewage and other service pipes nestling between. An overall width of 3.3metres ensures that the bridge can be used by road vehicles such as fire trucks, ambulances in an emergency…
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Suspension Bridges

For the Hume and Hovell walking trail, crossing the Tumut and Goobarragandra Rivers was achieved by suspension bridges 60 and 52metres long. Both bridges were constructed a few years apart by Australian Army construction corps reservists as exercises. The bridge and its component parts were designed by Rob Wallace…
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Tantawangalo

Deep in a NSW State forest, accessible only by a narrow track winding its way up and down the steep terrain, the problem was not so much constructing this bridge but transporting it to site.

Apart from a helicopter, a 6 wheel drive truck towing a trailer was the only feasible method. Maximum weight for any component was limited to the 4 tonne lifting capacity of the caterpillar tracked hydraulic excavator. Maximum length for the trailer, dictated by the sharp bends and steep changes of grade, was 9 metres…
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The Bridgette Story

Bridgette began when Waldren Bridges was approached by a local government body seeking a better alternative to culverts. Culverts are widely used throughout Australia’s “sweeping plains” to bridge shallow waterways. Apart from taking considerable time to construct, culvert spans are short, typically no more than 3.6 metres. Consequently they tend to become choked with grass, debris, etc., which dramatically restricts flow during flood events. On the other hand conventional bridges have much bigger spans, commonly 10 to 12 metres, but the greater depth of girder plus deck also significantly reduces the waterway area…
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Tootool

Precast concrete Bridgette decks, supports and abutment walls enabled this 10 span bridge to be completed in 2 short stages.

Formwork and reinforcement for the footings were prefabricated and transported to the site, lowered into position into the freshly excavated foundations and filled with concrete. Two or three footings were completed per day, which enabled the 11 footings to be cast within a week. A couple of weeks later the superstructure was erected on the footings, again taking little more than a week…
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