Fontaine
Workhorse 51
A three-axle hydraulic-detachable lowbed with a 22 in deck-height reference and two documented usable-deck lengths. The shorter option is kept separate instead of inheriting the standard reference's rating.

What the documentation establishes
- Trailer family
- RGN / Detachable Gooseneck →
- Loading method
- Front detach
- Overall / side-rail width
- 8 ft 6 inManufacturer stated; loading condition not specified · Source ↗
- Usable main deck / well length
- 25 ftManufacturer stated; loading condition not specified · Source ↗
- Main-deck height
- 1 ft 10 inloaded · Source ↗
- Ground clearance
- 6 inloaded · Source ↗
A model name or nominal class does not establish usable payload. The rating conditions and build-specific questions below remain part of the selection.
Know the space. Know the limits.

Documented spans Shared numeric scale
Spans compare documented values. They are not positioned or scaled to the photograph.
Manufacturer stated; loading condition not specified
View dimension source ↗5 measurements to confirm
Request these values for the actual configuration. An absent value is not zero and does not establish a fit.
- Main deck / well length (nominal)
- Not documented
- Overall transport length
- Not documented
- Overall / side-rail width
- 8 ft 6 in / 2,591 mm · Manufacturer stated; loading condition not specified
- Usable main deck / well length
- 25 ft / 7,620 mm · Manufacturer stated; loading condition not specified
- Usable support width
- Not documented
- Upper-deck length
- Not documented
- Rear-deck length
- Not documented
- Main-deck height
- 1 ft 10 in / 559 mm · loaded
- Ground clearance
- 6 in / 152 mm · loaded
- Kingpin setback
- Not documented
- Swing clearance
- Not documented
- Coupler height
- Not documented
- Axle spacing
- 4 ft 6.5 in / 1,384 mm · Manufacturer stated; loading condition not specified
- Gooseneck length
- Not documented
- Main hydraulic tail length
- Not documented
- Deck transition drop
- Not documented
- Loading ramp length
- Not documented
- Tail fold-under length
- Not documented
Overall length is not usable deck length. A published side-rail width does not establish the unobstructed support width. Values above come from documentation, not from image measurements.
Capacity with its conditions
Structural ratings do not approve axle loads, the tractor connection, route clearance or a permit.
What to verify
- Rating basis: 51 tons in 12-foot length - GAWR and tire ratings determine legal payloads
- Match the selected deck, neck and axle configuration to the actual build sheet.
- Read the complete capacity and support conditions at the source; a model-family rating is not automatically transferable.
- Loading method
- Front detach
- Axle arrangement
- 3
Manufacturer configuration detail
- Capacity
- 51 tons in 12-foot length - GAWR and tire ratings determine legal payloadsManufacturer source ↗
- Length
- 50 feet 11-1/2 inchesManufacturer source ↗
- Width
- 8 feet 6 inchesManufacturer source ↗
- Deck type
- FLDManufacturer source ↗
- Deck length
- 25 feet clear deck length, 24 feet optionalManufacturer source ↗
- Deck width
- 8 feet 6 inchesManufacturer source ↗
- Loaded deck height/clearance
- 22 inches with 6 inches ground clearanceManufacturer source ↗
- Standard trailer axles
- 3Manufacturer source ↗
- Axle spread
- 54.5"Manufacturer source ↗
- Swing radius
- 108 inches (11 feet 11 inches overall gooseneck length) - NGBManufacturer source ↗
Documentary statements retain their original conditions. Only unambiguous numeric fields enter dimensional checks.