A flatbed quote is not a freight class problem. It is a deck, a driver, a set of tiedowns and possibly a permit, and the price follows those four rather than the weight of what you are sending. Below is what each one does to the number, sourced from the trailer builder, the federal rules and a state permit office, all read on 2026-07-29.
Open-deck lanes are priced against the trucks available that week. Nobody publishes a rate card for them, so none is invented here.
The unit being sold is length of deck. Utility Trailer publishes its flatbeds at an overall length of 48 ft 0 in or 53 ft 0 in and an overall width of 102 in, and that width is not a design choice. The federal limit described by the FHWA is 102 inches on the National Network and reasonable access routes, with Hawaii allowed 108 inches, so a builder puts the deck edge exactly where the law stops.
| Figure | As published | What it costs you when you cross it |
|---|---|---|
| Deck length offered | 48 ft 0 in or 53 ft 0 in | Freight longer than the deck rides with an overhang, which brings flags, lamps and in most states a permit |
| Overall trailer width | 102 in | The deck is the legal width already, so cargo wider than the deck is an oversize load by definition |
| Federal width limit | 102 in on the National Network, 108 in in Hawaii | Crossing it turns a routine booking into a state-by-state permit exercise before the truck moves |
Two things follow from that table. Partial decks exist and get sold: a carrier who can put your 20 feet of steel behind somebody else's 25 feet will price it lower than a dedicated run. And the moment your cargo is one inch proud of the deck edge, you have stopped shopping for a rate and started shopping for permits.
On an enclosed trailer the walls do most of the work. On an open deck the driver does it, by hand, to a federal minimum, and the time that takes is inside your rate whether it is itemised or not. FMCSA publishes the counts.
| The article on the deck | Minimum tiedowns required |
|---|---|
| 5 ft or less in length, and 1,100 lbs or less in weight | One |
| 5 ft or less in length, more than 1,100 lbs in weight | Two |
| Greater than 5 ft but less than 10 ft, regardless of weight | Two |
| Over 10 ft in length | Two for the first 10 ft, plus one for every 10 ft or fraction of it beyond |
The same rules add a strength floor: the aggregate working load limit of the securement system must be at least one-half the weight of the article or group of articles it holds. A heavy piece therefore does not simply need more straps, it needs straps and chains rated high enough, and a driver who is short of either is a driver who cannot legally take your load.
Federal rules require the driver to inspect the cargo and the securement devices within the first 50 miles after beginning a trip, then again at each change of duty status, or after 3 hours, or after 150 miles, whichever comes first.
Machinery with no flat face, coils, pipe and anything that has to be blocked or cradled takes longer to make safe than a stack of banded lumber, and the quote reflects the loading time somebody expects to spend.
If your crane or forklift places the freight, the driver secures it afterwards. If the driver is expected to rig it as well, that is a different job and worth naming before the truck is dispatched.
Tarping is quoted apart from the line haul because it is bought in units of work rather than miles. Two tarps over a tall load is a different afternoon from one tarp over a low one.
A steel tarp is dragged onto the load, spread, and tied down, and it comes off and goes back on again if the load is opened at a scale or a yard. Weather makes each of those passes slower.
Lumber, drywall, machined parts and anything that stains or rusts usually rides covered. Ask for it at quote time, because a driver who arrived without tarps cannot produce them at your dock.
Tarps also add height and weight to a load that may already be close to a limit, which is a small point until the route has a 13 ft 6 in bridge on it.
Each state publishes the envelope a load may occupy without asking permission. Texas prints its limits plainly, and they are typical of what the rest of the country looks like within a few inches.
| Limit | Published figure |
|---|---|
| Width, all vehicles and loads other than passenger vehicles | 8 ft 6 in |
| Height, all vehicles | 14 ft |
| Length, semitrailer in a two-vehicle combination | 59 ft |
| Gross weight | 80,000 lb maximum |
Height is the one people get wrong on an open deck, because the load sits on top of a deck that is already several feet off the road and the measurement is taken from the ground. Measure the finished load as it will stand on the trailer, not the crate on your floor, and measure it after the tarps go on.
Hundredweight and freight class exist to divide one trailer fairly between strangers. Open-deck work rarely splits that way, and the carrier is committing a specific trailer and a specific driver to a route for a day or more. Estes, to take a published example, treats a shipment as truckload at 30,000 pounds or more, or at least 48 linear feet of the trailer. Past that line the rating question stops being how heavy the freight is per hundred pounds and becomes how far the truck goes, how long it is tied up, and whether it has anything to haul on the way back. Two identical loads leaving Berkeley Heights, NJ on the same morning can quote differently purely because one of them ends somewhere trucks are queuing for freight and the other ends somewhere they are not.
Length, width, height and weight for each item, not a total. Deck planning and permit thresholds both work piece by piece.
Crane, forklift, ramp, or rolled on. It decides which trailer type is dispatched and how long the pickup takes.
Dates and hours at pickup and delivery. On a dedicated deck, waiting is a cost that lands on your invoice.
SMKlog sells US domestic parcel labels directly through the calculator and routes freight to a person. We do not own decks, we do not dispatch drivers, and we do not publish an open-deck rate card, because there is no honest way to publish one that is still true next week. What we can do is take the dimensions, the weight and the two ends of the lane and come back with a real number for that load.
Sources read 2026-07-29: utilitytrailer.mediafuel.net/flatbeds/specifications, ops.fhwa.dot.gov federal size regulations, fmcsa.dot.gov cargo securement rules, 49 CFR 392.9(b) as published at govinfo.gov, txdmv.gov Texas size and weight limits, estes-express.com/services/volume-and-truckload.
Per mile for the lane, because you are buying a deck and a driver's day rather than space in a shared trailer. Weight matters against axle limits rather than as a rating unit, and the items that move the number after that are tarping, securement labour, permits and time spent waiting to load.
No figure is printed here. Flatbed pricing moves with the lane, the season and how many empty decks sit near your pickup that week, so a per-mile number written today would mislead somebody reading it next month. Send the load through the review form and a person prices the actual lane.
It is quoted separately from the line haul on most flatbed loads. Tarps are heavy, they are hauled up over the freight by hand, and the work is repeated whenever the load is opened for inspection, so the charge tracks crew time and the number of tarps rather than the miles.
The federal minimums are published by FMCSA. One tiedown covers an article 5 ft or less in length and 1,100 lbs or less in weight; two are needed for an article 5 ft or less but heavier than 1,100 lbs, and for anything over 5 ft and under 10 ft. Past 10 ft it is two tiedowns for the first 10 ft plus one more for every additional 10 ft or part of it.
As soon as the cargo passes the state's legal envelope. Texas publishes 8 ft 6 in as the legal width for a loaded vehicle and 14 ft as the legal height, and the deck is already built to the full legal width, so an inch of overhang either side is an oversize permit rather than a rounding error.