Routing the load…
Well deck · maximum legal height
Double-drop
transport, quoted to the line.
Drops twice — behind the gooseneck and again into a well between the axles. The well carries the tallest freight that can still move without a superload review.
Well height
~22–24 in
Well length
25–29 ft
Freight height
to ~11 ft 6 in
Loading
Crane (well is enclosed by decks)
How this equipment runs
Double-Drop Transport.
A double-drop's well sits about two feet off the road, bounded by a raised front deck over the gooseneck and a rear deck over the axles. Freight in the well gets the most height allowance of any common trailer — around 11'6" of cargo while staying near legal overall height. Turbine components, industrial tanks, presses, transformers in the mid-weight class: the tall-but-not-monstrous freight lives here.
The constraint is the well itself: 25 to 29 feet of usable length with decks at both ends, so the load must fit inside it and be craned in from above. A machine that needs to drive on wants an RGN instead — the detachable gooseneck versions blur into the RGN family.
Choosing between lowboy and double-drop is mostly a length-versus-height question: similar well heights, but the lowboy's open rear loading suits machines, while the double-drop's enclosed well shields tall static freight and adds the front deck for accompanying pieces. We spec it off the actual crate list, not the category name.
Frequently asked
Double-drop questions.
Double-drop vs lowboy — what's the actual difference?
Both get the deck low. The double-drop's well is enclosed between two raised decks (crane loading, tall static freight); the lowboy loads from the rear and suits machinery. Well lengths and heights are similar — the load's shape and loading method decide.
How tall can freight in the well be?
Around 11'6" stays near legal overall height on most routes. Taller moves are permitted with route surveys — possible, but now the schedule belongs to the permit offices. We confirm the controlling clearance on your specific route before quoting.
Can cargo extend beyond the well?
Length over the decks is workable with the right securement plan; height above the well goes by the lowest structure on the route. Send dimensions and the coordinator runs the clearance check before anything is promised.
Got a double-drop load?
Quote it now.
Line by line, no TBDs.
Well deck · maximum legal height. Permits, escorts, and route checks included. A named coordinator quotes it the same day.