Beyond the mainstream EWP types — boom lifts, scissor lifts, cherry pickers, spider lifts and vertical mast lifts — a range of highly specialised elevated work platforms are used across Australian infrastructure, rail, forestry and industrial sectors. These specialised MEWPs and EWPs are engineered for a specific access challenge that standard access equipment cannot solve: inspecting the underside of a bridge, maintaining overhead rail infrastructure, accessing steep forest terrain, or handling material loads at height. This guide covers each specialised EWP type, what it is designed for, and where it appears on Australian work sites.
Underbridge EWPs and bridge inspection units
An underbridge EWP — also called a bridge inspection unit or bridge access unit — is a specialised machine designed to inspect and maintain the underside of bridges and elevated road or rail structures. The machine uses an articulating or telescoping arm that extends below the bridge deck, positioning the operator's basket beneath the structure for visual inspection, concrete testing, NDT testing, repainting and structural repairs.
Bridge inspection units are used by road authorities (state departments of transport, local councils and road agencies), rail infrastructure managers and structural engineers across Australia. They mount on truck chassis and drive to the bridge, deploying over the edge of the deck to access the soffit (underside) from above. Some units can also be used for general boom lift work when not in bridge inspection mode.
Rail EWPs and road-rail EWPs
Rail EWPs are elevated work platforms designed to operate on or adjacent to active rail corridors. Rail-mounted EWPs travel on the rail itself — either on dedicated maintenance trains or as self-propelled rail units — to access overhead traction wire infrastructure, signal gantries, tunnel structures and elevated rail assets.
Road-rail EWPs combine road and rail capability in a single machine: they can travel on public roads to the rail access point, lower their road-rail conversion wheels onto the track, and then travel along the rail under their own power. Road-rail EWPs are used by Australian rail infrastructure managers including ARTC, Sydney Trains, Metro Trains Melbourne and Queensland Rail for overhead catenary maintenance, signal work, trackside structure access and inspection.
Forestry EWPs and arborist EWPs
Forestry EWPs — sometimes called forestry access platforms, arborist EWPs or vegetation management EWPs — are elevated work platforms adapted or purpose-built for forestry, arborist and vegetation management applications. They are typically mounted on all-terrain or 4WD truck chassis to handle the soft and uneven ground conditions of forest environments, and feature articulating booms with high lateral reach to access tree canopies without damaging the surrounding vegetation.
In Australia, forestry EWPs and arborist EWP trucks are used by arborist companies, vegetation management contractors, powerline clearing crews and plantation operators. The ability to operate on steep, soft and uneven ground is a critical specification for forestry applications — distinguishing these machines from standard cherry picker trucks used in urban environments.
Material handling EWPs and material handling aerial devices
Material handling EWPs — also called material handling aerial devices or dual-function aerial devices — are elevated work platforms that combine people-lifting capability with a rated load-handling function. Unlike a standard EWP (where the basket is for people and hand tools only), a material handling EWP can lift and position loads as well as the operator, subject to specific engineering approval and operational controls.
In Australia, material handling aerial devices appear in utility, telecommunications and construction applications where the boom's reach and the basket's position make it more efficient to lift a load to the work point simultaneously rather than using a separate crane. These machines and their use must meet stringent engineering and compliance requirements beyond standard EWP certification.
Underbridge, rail and specialised EWP compliance in Australia
Specialised EWPs — underbridge units, rail EWPs, road-rail EWPs, forestry machines and material handling aerial devices — are subject to the same fundamental compliance framework as standard EWPs under Australian WHS legislation and the applicable Australian Standard. They must be inspected at the required intervals by a competent person, maintained in accordance with the manufacturer's requirements, and operated by personnel who are trained and assessed as competent on the specific machine type.
The specialist nature of these machines often means that inspection and maintenance must be performed by technicians with specific training and experience in that equipment category — a general EWP inspector may not have the competency to assess a bridge inspection unit or a road-rail EWP without additional specific training.
This guide is general information prepared by EWP Australia and is grounded in publicly available Australian Standards and Safe Work Australia material. It is not a substitute for the current published edition of the relevant standard or for site-specific engineering advice. Always work from the current standard and consult a competent person for your specific equipment and application.