An RGN (Removable Gooseneck) is a lowboy trailer with a detachable front section that allows the deck to lower to the ground. This makes it possible for heavy equipment to be driven directly onto the trailer without relying on traditional loading ramps. RGNs are widely used for transporting oversized and heavy equipment because they offer a low loading height, high weight capacity, and easier equipment access.
As a BBB Accredited A+ rated company, BAH Logistics regularly coordinates heavy equipment shipments requiring RGN trailers. Our experience with RGN transportation includes evaluating equipment dimensions, weight, loading requirements, and route considerations to help determine the right transportation solution. In this guide, we'll explain how RGN trailers work, what they can transport, and when an RGN is the right choice for your shipment.
How a Removable Gooseneck (RGN) Trailer Works
RGN trailers operate in a few key stages:
1. Positioning. The truck driver spots the trailer close to the equipment, ensuring enough clearance for loading.
2. Detachment. The gooseneck disconnects from the main deck and moves out of the way, lowering the trailer bed completely to ground level.
3. Loading. Equipment that can move under its own power drives directly onto the front of the lowered deck. Non-operational machinery is winched on instead — no steep, dangerous rear ramps required either way.
4. Securing. Once loaded, the equipment is chained, strapped, and chocked to the deck to keep it stable and secure during transport.
5. Reattachment. The gooseneck reconnects to the deck, hydraulically lifts the trailer back to transport height, and locks securely into place.
This front-loading design is critical for tall, heavy, or non-operable machinery that can't safely climb standard ramps, making RGNs one of the safest and most versatile options for hauling oversized equipment.
Key Features of an RGN Trailer
Removable Gooseneck (RGN) trailers are engineered with specialized components that make them the gold standard for moving massive, self-propelled machinery. Their defining features include:
Ground-Level Front Loading. The signature feature of an RGN is its ability to disconnect the gooseneck entirely, dropping the front of the main deck directly onto the ground. This turns the trailer frame into a gentle incline, letting tracked and wheeled machinery drive straight onto the deck without the risk or steepness of rear ramps.
Ultra-Low Drop Well: To maximize vertical clearance, the center deck (the well) drops sharply behind the gooseneck, typically riding just 18 to 24 inches above the asphalt. This ultra-low profile is essential for legally transporting tall equipment like excavators or industrial boilers without hitting overhead bridges.
Extreme Multi-Axle Scaling: While standard trailers are capped by weight laws, RGNs feature modular frames built to scale. By adding flip axles, pin-on boosters, or spreader bars, an RGN can expand from 2 or 3 axles up to 9 or more axles, enabling it to legally distribute and transport payloads exceeding 80 tons.
Dual-Grounded Stability: When detaching, the gooseneck utilizes heavy-duty ground-bearing feet or specialized lift cylinders that press into the pavement. This stabilizes the truck and gooseneck framework while the main trailer deck is being unpinned and reattached, ensuring safe operation on uneven terrain.
Reinforced High-Yield Steel Construction: Because the dropped center well has no structural frame running directly beneath it, RGNs are built using premium, high-yield fabricated steel main beams. This unique "drop frame" engineering ensures the trailer will not sag or flex under concentrated, immense center-deck weight.
RGN Weight and Size Capacity
RGN capacity is not a single fixed number. It varies based on axle configuration, trailer style, and the requirements of the shipment. Here is a general breakdown:
| Trailer Configuration | Average Weight Capacity | Standard Well Length |
|---|---|---|
| Standard RGN (2 to 3 Axles) | 38,000 to 70,000 lbs | 24 to 33 feet |
| Heavy Duty RGN (Multi-Axle / Boosters) | 70,000 to 150,000+ lbs | 24 to 33 feet |
| Stretch / Extendable RGN | Up to 150,000 lbs (decreases when extended) | Extends from 29 feet up to 50–74 feet |
For oversized loads that exceed a standard well length, stretch or extendable RGNs can provide additional deck length. They are commonly used for long equipment such as crane booms, drilling rigs, and other specialized machinery.
The key point is that axle count and trailer configuration determine what an RGN can transport. It is not enough to look only at the trailer's maximum rated capacity. The load must also be distributed properly across the axles and remain within applicable weight limits. Equipment positioning on the deck can also affect how weight is concentrated across individual axles.
What Gets Hauled on an RGN?
RGN trailers are used across a wide range of industries to move equipment that is too heavy, too tall, or too difficult to load onto conventional trailers.
Construction
RGN trailers regularly transport cranes, bulldozers, excavators, wheel loaders, articulated dump trucks, scrapers, pile drivers, and asphalt pavers. Their low deck height and front-loading design make them well suited for large construction equipment that can be difficult to load onto trailers with higher decks.
Agriculture
Farming operations use RGNs to transport oversized tractors, combines, harvesters, and other agricultural machinery between fields, dealerships, storage facilities, and job sites. The low deck can provide additional overhead clearance while accommodating equipment with substantial weight and dimensions.
Industrial, Mining and Drilling
Heavy industrial and mining operations may use RGNs to move equipment such as rock crushers, mining machinery, drilling rigs, and other specialized machinery. These shipments can involve substantial weight, unusual dimensions, and concentrated loads, requiring careful trailer selection and load planning.
Military
RGN trailers can be used to transport heavy military vehicles and equipment, including tanks, armored vehicles, and tactical trucks. Depending on the equipment's weight and dimensions, specialized multi-axle configurations may be required to distribute the load properly and comply with applicable transportation requirements.
Energy, Oil and Gas
The energy sector uses specialized heavy haul equipment to transport items such as industrial generators, large transformers, pumping units, and certain wind energy components. Depending on the size and weight of the cargo, an RGN or another specialized trailer configuration may be selected.
Aerospace and Marine
RGNs and other specialized trailers can transport large aerospace and marine components, including boat hulls, engines, and oversized aircraft components. These shipments often require careful positioning and custom securement based on the cargo's dimensions, weight, and center of gravity.
Specialized Infrastructure
RGNs can also be used to transport large infrastructure components such as precast concrete beams, steel structural components, and industrial HVAC equipment. The appropriate trailer depends on the component's dimensions, weight, loading method, and route requirements.
RGN vs. Lowboy: What's the Difference?
An RGN is a type of lowboy trailer with a detachable front section. A standard lowboy has a fixed neck. Both keep heavy equipment lower to the ground than a conventional flatbed, but they differ in loading, stability, capacity, and cost.
Loading Method
An RGN's front section detaches and lowers to the ground, allowing self-propelled equipment to drive directly onto the deck. A standard lowboy has a fixed neck, so equipment typically requires rear ramps or lifting equipment for loading.
Stability
Both trailers provide a low deck height, but an RGN can typically position the load lower, helping maintain overhead clearance and lower the center of gravity. This can be especially useful for tall or top-heavy equipment. With either trailer, stability also depends on weight distribution, securement, trailer configuration, and road conditions.
Weight Capacity
RGNs are available in various configurations, including multi-axle setups for extremely heavy equipment. Standard lowboys can also handle substantial loads, but their capacity is generally more dependent on their fixed design and axle configuration. In either case, the equipment's actual weight and weight distribution are critical.
Cost and Complexity
A fixed neck lowboy is generally simpler and less expensive because it does not require a detachable gooseneck mechanism. An RGN costs more but provides easier drive-on loading, lower deck heights, and greater flexibility for specialized heavy haul work. For equipment that can be loaded with ramps or lifting equipment, a standard lowboy may be the more practical choice.
Choosing between an RGN and a lowboy depends on the equipment, weight, dimensions, and loading requirements. If you're not sure which trailer is right for your equipment, send BAH Logistics the equipment details, and we'll help you determine the best option for your shipment.
Standard RGN vs. Stretch RGN
Standard and stretch RGNs differ mainly in deck length. A standard RGN is designed for heavy equipment that fits within a typical deck, while a stretch RGN extends to accommodate longer cargo.
Core Definition and Mechanism
A standard RGN has a fixed deck length, typically around 24 to 33 feet in the well. A stretch, or extendable, RGN uses a telescoping frame that can extend significantly farther, sometimes to 50 feet or more, allowing it to carry cargo that is too long for a standard RGN.
Structural Weight Trade-Off
A standard RGN maintains a consistent frame length and weight capacity based on its configuration. With a stretch RGN, available weight capacity can decrease as the trailer is extended because the longer frame creates greater stress and deflection. For heavier loads, additional axles, jeeps, or boosters may be needed to distribute the weight properly.
Maneuverability and Transport Complexity
A standard RGN is generally easier to maneuver through turns and intersections. A stretch RGN becomes more difficult to handle as its length increases, which can require additional route planning, oversize permits, pilot cars, or other specialized requirements depending on the shipment.
BAH Logistics evaluates all of these factors before selecting the right trailer configuration, whether that means a standard RGN or a stretch RGN. This proactive planning helps ensure your heavy equipment is transported safely, legally, and efficiently from pickup to delivery.
When BAH Logistics Recommends an RGN
A standard flatbed or fixed-neck lowboy is often more economical for standard loads. However, BAH Logistics will explicitly recommend an RGN if your shipment features any of the following characteristics:
The machinery is self-propelled and can utilize the front-loading deck to avoid crane or external ramp fees.
The cargo is tall or top-heavy, requiring an ultra-low center of gravity to preserve transit stability.
The route contains strict height restrictions, where saving a few inches of deck height keeps the load clear of low bridges.
The machinery is non-operational but can be winched, allowing disabled heavy equipment to be pulled straight onto ground level.
Quick Reference: RGN Trailer Specs
Here’s a quick comparison of standard and stretch RGN specifications:
| Specification | Standard RGN | Stretch RGN |
|---|---|---|
| Main Deck Length | 24 to 33 feet | Extends up to 50+ feet |
| Deck Height | 18 to 24 inches | 18 to 24 inches (when closed) |
| Typical Weight Capacity | 38,000 to 150,000+ lbs | Scales down as the frame extends |
| Best Used For | Heavy, compact equipment (excavators, dozers) | Elongated cargo (wind blades, structural beams) |
Is an RGN Right for Your Equipment?
An RGN’s detachable gooseneck allows equipment to drive directly onto a low deck, making it ideal for tall, heavy, or difficult-to-load machinery. The right trailer depends on your equipment’s weight, dimensions, loading method, and route requirements.
As an FMCSA-registered company, BAH Logistics safely coordinates equipment and vehicle shipments nationwide. We work with a range of specialized heavy haul trailer configurations, including RGNs, stretch RGNs, lowboys, step decks, flatbeds, and double drops.
Not sure which trailer your shipment requires? Send BAH Logistics your equipment details, and our team can help evaluate the available trailer options and provide a free quote.
