Manufacturers of structural steel frames and members, including universal beams, universal columns, girders, fixings, prefabricated frames, portal frames, and stick framing systems, for residential and commercial applications.
Adelaide Metro’s major rail station upgrades involved galvanizing a total of 850 tonnes of structural steel. Including the platform canopies, heavy pedestrian overpasses, bike sheds, lift towers and access stairs, the galvanized steel is resistant to corrosion, wear, and vandalism – a key concern given the high-traffic nature of the site, and the periods of idle time between trains.
Hot dip galvanized steel has long been a staple building material for schools and educational facilities.
Australian Shadola specialises in providing shade structures and weather canopies to Australian customers, and a significant part of their work involves educational facilities. All of their structures are engineered and structurally certified, with wind ratings above 130 km/h, meeting both the aesthetic and durability requirements of educational facilities. Australian Shadola are also flexible in their building and construction methods, and specialise in modular design – a method which allows work to be completed in stages as dictated by needs and finances. The galvanized steelwork is robust enough to withstand use by schoolchildren, and comes with minimal maintenance costs – a deciding factor in its widespread use, as education funding is always subject to many competing needs. All steel is after-fabrication hot dip galvanized, and immune to the effects of the sun and UV radiation. Hot dip galvanized steel also has the advantage of a long history of use in schools, is easy to handle, is robust enough to survive transportation and can be erected under most climatic and site conditions.
The Sydney Desalination Plant was designed to protect the future of the region by ensuring a supply of water without impinging on other natural water sources. The location of the plant in a coastal area, and the nature of the process it is required to handle, means that corrosion protection – in the form of hot dip galvanizing – is a significant feature of the design.
Sydney Water needed to build a structure that was durable, but which kept future maintenance costs to a minimum. The Plant’s coastal location and application make durability a critical part of its design. A steel portal frame building was assessed as the most practical, economic design due to its large area and the wide spans required to house the necessary plant and equipment. However, the coastal nature of its location required a superior corrosion protection system to ensure durability, economical operation and minimal maintenance, all while keeping the initial cost as low as possible. For these reasons, galvanized steel was used for all the structural and associated steelwork. Its use meant that the fabrication could be done offsite, increasing the speed of fabrication and considerably reducing the number of people required onsite. Speed of fabrication and erection are inherent advantages for a structural system by the coast.
Corrosion resistant + Abrasion resistant + Low maintenance + Will not be damaged by transportation or installation + Will not chip off + Durable + Offsite fabrication + Speedy installation
In coastal or chemical environments, or where extra durability and security is required, the practice of hot dip galvanizing steel reinforcement in concrete is now a well-proven safeguard against corrosion. Without this protective coating, corroded reinforcing in concrete is extremely difficult and costly to repair.
Steel reinforcement in concrete is susceptible to corrosion under certain conditions, and with serious consequences. Since reinforcement is embedded within concrete and hidden from view, corrosion problems are all the more insidious. By the time the first tell-tale signs become visible, corrosion is in all likelihood already well advanced. At worst, complete replacement of the structure may be required. Reinforcement corrosion is now considered to be the leading cause of premature concrete failure in the world today and needs to be adequately addressed for structures situated in highly corrosive environments.
Hot dip galvanizing results in a very durable coating for steel reinforcement, enabling concrete structures to be more tolerant of variations in concrete quality and reinforcement placement. It provides a safeguard against unexpected corrosion, adding minimal cost to a construction project budget, and providing insurance against the risk of concrete repair and remediation or complete replacement of a prematurely failed structure.
Corrosion resistance + Durability and sustainability + Low maintenance + Concrete structures more tolerant of variations in concrete quality and reinforcement placements + Insurance against the risk of concrete repair + Environmentally responsible + Galvanised steel reinforcement has no adverse effect on reinforcement’s inherent strength + Galvanised steel reinforcement’s bond strength with concrete increased + Galvanised reinforcement delays the time for corrosion initiation by 4-5 times that of unprotected reinforcement under similar conditions.
Ideal for: marine or coastal structures, high risk structures in corrosive environments, immersed or buried structures subject to groundwater effects or chloride presence, containment structures subject to prolonged contact with water, structures subject to extended periods of wetness + Applications in: seawalls, jetties, pontoons, offshore structures, coastal bridges and roads, building construction (esp. in coastal areas), industrial sites, cooling towers, tunnel structures, critical support structures
The Gravity Discovery Centre at Gingin, Western Australia combines high-tech materials with highly efficient, passive solar design. Environmental responsibility and sustainability were key considerations in choosing construction materials, as well as low maintenance and affordability. For this reason, the structural steel in the main centre, all of the existing and proposed walkways for disabled access, and the Centre’s Leaning Tower are all protected by hot dip galvanizing.
A major attraction at this Centre, the Leaning Tower is designed so visitors can replicate Galileo’s gravity experiments on the Leaning Tower of Pisa. Tilted at 14.8˚, the Tower’s structure was designed to cope with permanent stresses in its steel members. To ensure that it could cope, all of the tower structure is made up of hot dip galvanized steel. The owners and designers wanted to make sure that the steel was protected by a system that was robust, simple and removed the financial and onerous burden of maintenance common to most other coatings. The site’s remoteness and exposure to the elements also makes the UV resistance of galvanized steel a major consideration, and the fact that many steel members required multiple handling during construction put the robustness of galvanized coating under close scrutiny.
Corrosion control + Durability and sustainability + Low maintenance + UV resistance + Environmentally responsible
At its peak, Midland was Western Australia’s rail industry centre; its Railway Workshops defined Midland, training tradespeople and professionals. When these Workshops were closed, a significant part of the Midland identity was lost, and a programme to redevelop the area was begun. The Midland Redevelopment Authority aimed to restore and grow the area into a vibrant, diverse and thriving community.
Conforming to Ecologically Sustainable Design principles (ESD), the Woodbridge Lakes housing development was thus conceived. ESD principles specify environmentally friendly homes in terms of energy efficiency, the use of appropriate construction materials, durability, water conservation, and landscaping. The design guidelines also require acknowledgement of the character and history of the Railway Workshops, encouraging the use of materials that complement the area’s history. An iconic Australian material, galvanized steel, became the material of choice. A common sight on Australian landscapes, galvanized steel fits in well with the aesthetics of the area, has superior corrosion resistance, and is robust, with a coating that cannot be removed by impact or abrasion.
The Woodbridge Lakes development has regenerated Midland through its innovative planning and design. The region is now one of the fastest growing areas in Australia. Woodbridge Lakes now has houses valued in the million-dollar bracket, changing the wider perception of Midland and creating momentum to help continue redevelopment of the region.
Corrosion control + Durability and sustainability + Low maintenance + UV resistance + Environmentally responsible + Iconic Australian material + Metallurgically bonded coating resistant to flaking or removable
With a long history of proven performance, and a wide variety of applications, galvanised steel is the material of choice when economics, durability, and sustainability are criteria to consider. Its use is becoming more widespread in Australia due to wider recognition of its inherent properties, and evidence it can persevere in some of the most demanding environments, such as the Australian coast.
Coastal environments have an increased corrosiveness that requires steel to have appropriate corrosion protection systems. Hot dip galvanising is the preferred mode of defence in these harsh environments, in many cases matching or exceeding the performance of more complex and newer systems. The following cases have all used galvanised steel in areas with high exposure to ocean spray:
The 27-year-old Port of Botany Light Towers have been exposed to varying levels of sea spray and still appear to be in good condition, with at least 20 years of remaining life.
10–15m off the coast, the Portland Maritime Discovery Centre is frequently assailed by ocean wind. In its 9 years of life, the galvanised steel has performed well with no maintenance.
Bridge rails along the Great Ocean Road, 10–30m from breaking surf and water, are in excellent condition, and are expected to perform for another 20 years with minimal maintenance.
The Geelong Carousel Pavilion employs galvanised coating for all its structural steel, much of which is exposed to the sea. It has been open for 6 years and has required no maintenance in that time.
The demand for the corrosion protection of steel will continue to increase due to the increasing coastal population of Australia. Hot dip galvanising minimises costs, maintenance, and unsustainable industry practice. Due to its proven performance, it has become almost a culturally implemented, iconic material on Australian shorelines.
Corrosion resistant + Abrasion resistant + Low maintenance + Will not be damaged by transportation or installation + Will not chip off
Aforementioned case studies have employed galvanised coating thicknesses 2 – 3 in excess of the levels required by AS/NZS 4680 + Consider use of plastic inserts to prevent bimetallic corrosion + Consider use of bolting + Consider design elements to allow the washing effects of rain on external steelwork
In designing the Westpac Call Centre, S-Square – who specialise in the creation of large span, column-free structures using post-tensioned steel – had one main requirement to fulfil: the centre’s interior offices had to be column-free. In order to meet this requirement, S-Square made use of hot-dip galvanised steel.
The requirement of a column-free interior would traditionally necessitate deeper, heavier steel beams. Instead, S-Square fabricated comparatively light trusses with a hollow bottom chord through which cables were passed. These trusses were able to span the large distances of the call centre due to the stressing applied to these cables, and their function of holding the ‘stored energy’ of the structure.
The resulting design by S-Square is distinctively ‘inside out’ in appearance, making aesthetic use of exterior structural steelwork. The tubular trusses essential to the building’s structure are, in this design, exposed to the elements, and thus required a higher degree of corrosion protection, achieved with after-fabrication hot dip galvanising.
After-fabrication hot dip galvanizing will protect almost every type of steel structure imaginable. Galvanised steel is highly durable, has minimal need for ongoing maintenance, and is sensitive to all environments – its superior corrosion and abrasion resistance make it a highly versatile material. For these reasons, it is well-suited to public traffic situations, where it is warm enough that people will accept its presence. One example of such use is at Lake Vasto, Perth, where a combination of timber and galvanised steel lend a “raw quality” to a constructed boardwalk on the lake, increasing the aesthetics of the scene and promoting public use of the area. Another example is in Victoria, at the Cranbourne Royal Botanic Gardens, where the use of timber and galvanised steel in visitor shelters and bridges contribute to a natural, earthy feel.
The use of galvanised steel virtually eliminates maintenance costs; transportation and installation will not damage the galvanised coating – unlike with powder coating and paint – and in use, it will not chip off. An iconic Australian material, galvanised steel has been part of the rural environment for over 130 years (in shelter, water collection, and fencing), a history that speaks for its highly practical and functional qualities.
Corrosion resistant + Abrasion resistant + Low maintenance + Will not be damaged by transportation or installation + Will not chip off
Slip factors can be applied to enable high strength frictin grip bolting + Paint finishes to be specified at the time of order
After-fabrication hot dip galvanizing has long been recognized as superior corrosion protection. It is also recognized as an environmentally friendly corrosion protection technology based on the measures of sustainability, durability and life cycle assessment.
Water reclamation plants are highly corrosive environments and only the most robust materials can survive. Pipework can come into contact with sewage, salt air and high temperatures – factors that cause and accelerate corrosion. Galvanised steel is therefore the material of choice in such situations.
The Black Rock water reclamation plant (managed by Barwon Water on Victoria’s southwest coast) has been engineered to ensure it has the least impact possible on the surrounding environment, rejecting the use of materials and processes that are costly – in monetary and environmental terms – and that can cause further problems when they degrade. Instead, the successful implementation and operation of the plant using hot dip galvanized steel, stainless steel, and aluminium has ensured the facility has a relatively trouble-free life with no impact on its surrounding environs.
The use of galvanised steel to form part of its infrastructure makes the Black Rock water reclamation plant low maintenance, economically efficient, and sustainable.
Impervious to corrosion + Galvanised steel’s two components, zinc and steel, are recyclable + Low maintenance + Economical
In designing a community pool, as well as functional design elements, the fiduciary costs must necessarily be considered; community pools typically spawn large running and maintenance costs in the long term. For this reason, plans detailing a low maintenance regime are essential, and because the functional demands of an indoor pool structure requires the accommodation of a number of forms, shapes and site limitations, the use of steel as a solution to both these requirements is therefore common.
Steel has long-span capabilities, with low structural presence and space occupation, design flexibility for future additions, a host of suitable connecting methods (eg bolting, welding, pinning), and, when galvanised, is further immune to UV, has outstanding abrasion resistance, and low maintenance needs.
Galvanised steel makes all the difference in the indoor pool environment. Here, water is heated for swimmer comfort and results in humid, chlorine-laden air – steel is therefore constantly wet and could – without galvanizing – be corroded.
Reduced monetary cost + Low maintenance + Long-span capabilities + Low structural presence and space occupation + Many suitable connecting methods (e.g. bolting, welding, pinning) + Immune to UV + Outstanding abrasion resistance
Hot dip galvanised steel provides a protective coating that prolongs the life of steel by shielding it against corrosion and abrasion. Once steel is galvanised it becomes maintenance-free which means it remains structurally stable and aesthetically pleasing for longer. Galvanised steel can be used for structural and aesthetic applications, including concrete reinforcing and detailing. For more information about galvanised steel view online resources from Galvanizers Association of Australia (GAA) or select “request information.”
Whether you’re a business, council or homeowner, Sydney’s premier foot bridge suppliers can bring you the bridge you need. From bridges designed to cross ditches and waterways, to those intended to limit human impact on natural environments, the skilled engineers at Ox Engineering are the masters at providing cost effective yet boldly designed bridges, tailored to your unique needs.