Low-bed trailers are the go-to solution for abnormal load transport in South Africa — and for good reason. Their unique design characteristics make them the safest and most practical way to transport heavy, tall, or oversized industrial equipment on South African roads. This article explains what makes low-bed trailers the preferred choice for abnormal transport and what to know when using them for machinery and equipment movements.
Why Are Low-Bed Trailers the Best Choice for Abnormal Load Transport?
Low-bed trailers offer several specific advantages over other trailer types for heavy and oversized load transport. Their reduced deck height — typically 400mm to 900mm above the road surface — means that tall equipment stays within the 4.3-metre legal road height limit even when the load itself is substantial. Their multi-axle designs distribute heavy loads across more contact points, allowing heavier equipment to be transported within legal axle mass limits. And their structural design — with a strengthened deck and low centre of gravity — provides stability that standard flatbed trailers cannot match for heavy, unbalanced loads.
What Types of Equipment Are Transported on Low-Bed Trailers?
Low-bed trailers are used to transport a wide range of industrial equipment and machinery in South Africa, including industrial boilers and pressure vessels, large CNC machining centres and manufacturing presses, construction equipment such as excavators, graders, and bulldozers, electrical transformers and switchgear, steel fabricated structures and vessels, and modular process equipment such as generators and compressor packages. Any load that is too heavy or too tall for a standard flatbed trailer is a candidate for low-bed transport.
When Is an Abnormal Load Permit Required in South Africa?
An abnormal load permit is required in South Africa whenever a vehicle and load combination exceeds any of the following limits: 2.5 metres in width, 4.3 metres in height, 22 metres in total length, or the legal axle mass limits specified in the Road Traffic Act and Load Regulations. The permit is obtained from the relevant provincial road authority and must be in the vehicle cab before the load moves. For loads that require escort vehicles or time-of-day restrictions, these conditions are specified in the permit.
How Is a Low-Bed Trailer Loaded with Heavy Industrial Equipment?
Heavy industrial equipment is typically crane-loaded onto a low-bed trailer — the crane lifts the machine from its source position and lowers it onto the trailer deck under the guidance of spotters. The machine is centred on the deck and positioned so that the axle load distribution is within legal limits. Dunnage (timber or rubber matting) is placed between the machine and the trailer deck for protection and traction. The load is then secured with rated chains and load binders, with the securing arrangement specified in the transport plan.
Reef Rigging arranges appropriate low-bed transport as part of every machinery relocation project. Explore our machinery moving services or contact the team for a transport and rigging quotation.
Frequently Asked Questions: Low-Bed Trailer Transport
How do you apply for an abnormal load permit in South Africa?
Abnormal load permit applications are submitted to the relevant provincial road authority — in most provinces, this is through an online portal such as the Abnormal Load Management System (ALMS). The application requires the vehicle registration details, trailer configuration and specifications, load dimensions and mass, proposed route from source to destination, and proposed movement date. Applications should be submitted well in advance — processing times vary by province and load complexity, but allowing two to four weeks minimum is advisable for standard permits.
What is a route survey for abnormal load transport?
A route survey is a physical inspection of the planned transport route to confirm that the route can accommodate the load’s dimensions at every point from source to destination. The survey checks overhead utility line clearances, bridge height and weight ratings, road width at all turning points and intersections, and any hazards such as low overhead structures or soft road shoulders. For wide or tall loads, the route survey may require temporary measures — such as a utility company temporarily lowering a power line — to be arranged before the movement proceeds.