12 septembre 2026
The mud question: when the piggyback forklift stays on the truck
A forklift that rides on the back of the trailer solves the hardest part of a jobsite delivery: there is nothing at the other end to unload with. It places freight in fifteen to thirty minutes where a hand unload takes hours, and it does it with nobody on site. And then it meets a lot that took rain two days ago, and the question stops being what the machine can lift and becomes what the ground can carry. Here is the honest version of when the machine comes off the truck, when it stays on, and what a dispatcher asks before sending one.
What the machine actually is
Most people say Moffett, which is a brand the way Kleenex is; the category is the truck-mounted or piggyback forklift. A compact rough-terrain machine hangs on a mounting kit at the rear of the flatbed, dismounts in under a minute, unloads, and climbs back on. The common delivery machines lift 4,500 to 7,000 lb (2,041 to 3,175 kg) at a 24 in load center and weigh about as much themselves.
That weight is the whole story of this piece. Loaded, the machine puts roughly 12,600 lb (5,715 kg) onto three pneumatic tires, and everything it can and cannot do on a site follows from where that weight is standing.
The mud problem, stated plainly
Firm ground does not notice a piggyback. Saturated fill, a lot graded last week, or loose sand will let those three tires cut through the crust, and a machine buried to its axles does not come out by itself. Recovery means the site's telehandler if there is one, or a wrecker if there is not, both billable by the hour, while the freight sits on a stopped truck.
This is why the delivery truck never tries to pull the machine out: the likely result is a second stuck vehicle, and now the delivery is a recovery job.
South Florida makes this a season, not an accident. An afternoon storm turns a workable morning lot into a refusal by four o'clock, which is why the ground questions get asked twice: at booking, and again on arrival.
What the operator does instead
Deliver to the edge. When the lot is soft, the freight goes to the road edge or the driveway apron, staged in rows and photographed. A shorter carry to firm ground beats a stuck machine every time, and the site's own equipment makes the last move when the ground firms up.
Mat the path. For a known soft stretch, ground protection mats spread the machine's weight; the crew lays a path, drives it, and recovers the mats. It costs minutes and saves the afternoon.
Refuse the carry. The driver's judgment at the tailgate is final. That is not a service failure; it is the difference between a carrier that has done this before and one that is about to learn.
The other limits, since honesty does not stop at mud
Capacity is a hard line: past roughly 5,500 to 7,000 lb on a single pick, the job belongs to a crane truck. Lift height runs 120 to 144 in (3.05 to 3.66 m), which reaches a first-story eave and no further; shingles reach the driveway, not the roof deck. Published gradeability is 30 percent, and it is a traction number for the bare machine, not a license to cross a slope with a raised load. And the mast goes nowhere near power lines: 10 ft (3.05 m) is the minimum, checked upward before the first pick.
On the road, the machine is freight that pays no freight: with a 7,080 lb (3,211 kg) machine mounted, a five-axle combination has about 43,300 lb (19,640 kg) left for cargo. It also hangs several feet behind the trailer, flagged and lit as a projecting load under Florida law. None of this argues against the machine; it argues for quoting it only where it wins.
What a dispatcher asks before sending one
Has it rained in the last 48 hours. Is the surface paved, gravel, compacted fill, or fresh fill. How far is the drop point from pavement, and how wide is the gate. Will anyone be on site, or is this a place-and-photograph delivery. What arrives, in how many unit loads, and how heavy is the heaviest single pick.
Five answers, and the quote is honest. The jobs where a piggyback saves the most are exactly the jobs where the alternative was a crew of two and a long afternoon, and the jobs where it fails are knowable in advance. Knowing the difference is what the service is.
Piggyback · Moffett · Jobsite delivery · Flatbed · Ground conditions
Where to act on this
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Questions
Réponses directes
Can a piggyback forklift unload on soft or muddy ground?
Often not. Loaded, the machine puts roughly 12,600 lb onto three pneumatic tires, and saturated fill, a lot graded last week or loose sand will let those tires cut through the crust. A machine buried to its axles needs the site's telehandler or a wrecker, both billable by the hour, while the freight sits on a stopped truck. On soft ground the freight goes to the road edge or the driveway apron instead, staged in rows and photographed, or ground protection mats are laid to spread the weight.
How much can a truck-mounted forklift lift?
The common delivery machines lift 4,500 to 7,000 lb at a 24 in load center, and they weigh about as much themselves. Past roughly 5,500 to 7,000 lb on a single pick the job belongs to a crane truck rather than a piggyback, so the number that matters at booking is the heaviest single unit load, not the total weight of the shipment. A load that splits into several lighter picks is a piggyback job; one indivisible heavy piece is not.
How high does a piggyback forklift reach?
Lift height runs 120 to 144 in, which reaches a first-story eave and no further. Shingles and roofing get placed on the driveway, not on the roof deck. Two related limits belong with it: published gradeability is 30 percent, and that is a traction figure for the bare machine rather than permission to cross a slope with a raised load, and the mast stays at least 10 ft clear of power lines, which is checked upward before the first pick.
How much freight can a truck carry with a forklift mounted on the back?
The machine is freight that pays no freight. With a 7,080 lb forklift mounted, a five-axle combination has about 43,300 lb left for cargo, so a piggyback move trades payload for the ability to unload where there is nothing to unload with. It also hangs several feet behind the trailer and travels flagged and lit as a projecting load under Florida law. None of that argues against the machine, it argues for using it where it wins.
What does a dispatcher ask before booking a piggyback delivery?
Five questions. Has it rained in the last 48 hours. Is the surface paved, gravel, compacted fill or fresh fill. How far is the drop point from pavement, and how wide is the gate. Will anyone be on site, or is this a place-and-photograph delivery. And what arrives, in how many unit loads, with how heavy a single pick. Answer those and the quote is honest, because the jobs where a piggyback fails are knowable in advance.
Comment obtenir un tarif ?
Envoyez la route, l'équipement, la taille du conteneur et le port, et nous revenons avec un chiffre. Tarifs et répartition 24h/24 à quotes@dariaslogistics.com.