Oversize Load Visualizer
Pick the trailer, pick what you’re hauling, and enter the load’s width, height and length. The OSOWloads Load Visualizer draws the truck, trailer and load in 3D with the dimensions marked and the 8’6” wide by 13’6” tall legal box around it, so you can see what sticks out before you quote it. Free, no account.
Trailer
Tractor included
Load
0 = the load type's usual length
- Total Height
- 12' 4"
- Total Length (est.)
- 73'
Total Height is Deck Height plus Freight Height. Total Length estimates 20' of tractor ahead of the trailer.
What the visualizer draws
Four trailer types, built from the same equipment numbers the OSOWloads permit calculator uses: flatbed (5’ deck), step deck (3’6”, or 3’ low pro), double drop (18” to 22” well) and RGN (20” to 24” well), including stretch RGNs that open to about a 50’ well. Add a flip, a 1 to 3 axle jeep, or a 1 to 3 axle booster and the trailer grows by what each one adds.
Loads come in 16 shapes: a crated box, excavator, dozer, wheel loader, motor grader, crawler crane base, farm tractor, combine, transformer, generator skid, tank, steel girder, pipe, boat, modular building and wind blade. Each one is drawn to the width, height and length you enter, and the part that’s really the widest (a dozer’s blade, a loader’s bucket) is what spans your width.
What are the legal width and height limits?
Legal width is 8’6” in all 48 contiguous states. Legal height isn’t uniform. On the interstate it’s 13’6” in 26 states, 14’ in 20 and 14’6” in two (OSOWloads state rule data). The dashed box in the visualizer is 8’6” by 13’6”, so a load that fits inside it is legal on width and height in every state. One that doesn’t may still be legal on height in a 14’ state.
| Legal height | States (interstate) |
|---|---|
| 13’6” | AL, CT, DE, FL, GA, IA, IL, IN, KY, MA, MD, MI, MN, MS, NH, NJ, NY, OH, PA, RI, SC, TN, VA, VT, WI, WV (26) |
| 14’ | AR, AZ, CA, ID, KS, LA, ME, MO, MT, NC, ND, NM, NV, OK, OR, SD, TX, UT, WA, WY (20) |
| 14’6” | CO, NE (2) |
What it doesn’t do
It doesn’t calculate axle weights or weight distribution. Those depend on where the load’s center of gravity sits and how the rig is set up, and a drawing can’t know either. Axle spacing, neck length and tractor size in the picture are typical guesses. For per-axle limits use the Truck Axle Weight Calculator. For permit costs, escorts and restrictions state by state, run the load through the permit calculator.
Frequently asked questions
How tall is the deck on an RGN?
20” to 24” loaded on most RGNs. The Fontaine Magnitude 55MX sits at 20” with 6” of ground clearance, and Talbert lists 22” on its 35CC. Double drops run 18” to 22”, step decks 3’6” (3’ on a low pro) and flatbeds 5’. Total height is deck height plus the freight’s own height, which is why the same load can be legal on an RGN and over height on a step deck.
What is the legal height for a load?
13’6” in 26 states, 14’ in 20 states, and 14’6” in Colorado and Nebraska, on the interstate. Legal width is 8’6” in all 48 contiguous states. Go over either one and you need an oversize permit from every state on the route.
Does the Load Visualizer calculate axle weights?
No. Axle weights depend on where the load’s center of gravity sits and how the rig is set up, and a drawing can’t know either. The visualizer shows size: width, height, length, overhangs and where the load sits on the deck. For per-axle limits, use the Truck Axle Weight Calculator.
How much length does a jeep or booster add?
By default a 2-axle jeep adds 15’8” and a 2-axle booster adds 16’8” to the trailer, the same numbers the OSOWloads permit calculator uses. A flip adds 4’7”. Real equipment varies by maker, so measure yours when the permit length is tight.
Is the Load Visualizer free?
Yes, and there’s no account needed. Inside the OSOWloads permit calculator it also draws straight from the load you’re quoting.