Trailer Size and Weight Charts
Use these charts to compare common trailer sizes, typical empty weights, and how they affect legal payload. Specs vary by manufacturer and options, so treat these as practical ranges, not guarantees.
Quick legal baseline
On the Interstate system, the common federal weight baseline is: 80,000 lb gross, 20,000 lb per single axle, and 34,000 lb per tandem axle, unless the Bridge Formula dictates a lower limit.
There is no federal height requirement; states set their own height limits. Most states’ land ranges from 13 ft 6 in to 14 ft, with route-specific exceptions.
The standard maximum width on the National Network is 102 inches, with limited exceptions like Hawaii. Most states allow 53 ft semitrailers on at least some highways.
Chart 1: Common trailer dimensions by type
Typical specs for standard road use in the US.
|
Trailer type
|
Common lengths
|
Common width
|
Typical overall height
|
Key size notes
|
|---|---|---|---|---|
|
Dry van
|
48 ft, 53 ft
|
102 in
|
~13 ft 6 in
|
53 ft is the market standard in many lanes
|
|
Reefer
|
48 ft, 53 ft
|
102 in
|
~13 ft 6 in
|
Slightly different interior volume due to insulation and unit
|
|
Flatbed
|
48 ft, 53 ft
|
102 in
|
N/A
|
Deck height often ~58 in to 62 in (varies by suspension and tires)
|
|
Step deck (drop deck)
|
48 ft, 53 f
|
102 in
|
N/A
|
Lower main deck for height-sensitive freight
|
|
Double drop (RGN style)
|
35 ft to 53 ft overall
|
102 in
|
N/A
|
Very low well section for tall equipment
|
|
Lowboy
|
35 ft to 53 ft overall
|
102 in
|
N/A
|
Lower deck height than step deck, used for heavy equipment
|
|
Conestoga
|
48 ft, 53 f
|
102 in
|
N/A
|
Rolling tarp system adds height and weight vs flatbed
|
|
Extendable (stretch)
|
48 ft to 80+ ft extended
|
102 in
|
N/A
|
Built for long freight, length depends on extension spec
|
|
Tanker
|
42 ft to 53 ft
|
102 in
|
Varies
|
Tank diameter and fittings affect total height
|
|
End dump
|
34 ft to 39 ft (common)
|
96 in to 102 in
|
Varies
|
Body shape and tarp system affect height
|
|
Car hauler
|
48 ft to 53 ft
|
102 in
|
Varies
|
Height depends on upper deck setup
|
Reference example: A 53 ft Wabash dry van spec lists overall dimensions of 53 ft x 102-3/8 in x 13 ft 6 in, and interior heights of 110-1/4 in to 111-1/4 in, depending on location in the trailer.
Chart 2: Typical empty weight ranges
Empty weight varies significantly depending on options (steel vs. aluminum components, suspension, reinforcements, flooring, toolboxes, lift axle, doors, etc.). Use these ranges as planning numbers
|
Trailer type
|
Typical empty weight range
|
|---|---|
|
Dry van 53 ft
|
12,000 to 15,000 lb
|
|
Reefer 53 ft
|
15,000 to 19,000 lb
|
|
Flatbed 48 to 53 ft
|
9,000 to 13,000 lb
|
|
Step deck 48 to 53 ft
|
10,000 to 14,000 lb
|
|
Conestoga 48 to 53 ft
|
12,500 to 16,500 lb
|
|
Double drop / RGN
|
16,000 to 30,000 lb
|
|
Lowboy
|
15,000 to 28,000 lb
|
|
Extendable (stretch)
|
12,000 to 25,000 lb
|
|
Tanker
|
10,000 to 18,000 lb
|
|
End dump
|
11,000 to 18,000 lb
|
|
Car hauler
|
13,000 to 20,000 lb
|
Chart 3: Payload estimator
Payload depends on your tractor weight, fuel, and gear. Here’s the clean formula:
Estimated payload = Legal gross limit – Tractor weight – Trailer empty weight – Fuel and gear
Common legal baseline: 80,000 lb gross on the Interstate system.
Example payloads at 80,000 lb gross
Assumptions:
- Tractor (typical) = 18,000 lb to 20,000 lb
- Fuel and gear allowance = 1,000 lb to 2,000 lb
|
Trailer type
|
Trailer empty weight used
|
Tractor used
|
Fuel and gear
|
Estimated payload
|
|---|---|---|---|---|
|
53 ft dry van
|
13,500 lb
|
19,000 lb
|
1,500 lb
|
46,000 lb
|
|
53 ft reefer
|
17,000 lb
|
19,000 lb
|
1,500 lb
|
42,500 lb
|
|
53 ft flatbed
|
11,000 lb
|
19,000 lb
|
1,500 lb
|
48,500 lb
|
|
53 ft step deck
|
12,500 lb
|
19,000 lb
|
1,500 lb
|
47,000 lb
|
Important: axle group limits and the Bridge Formula can reduce what you can legally run even if the gross number looks fine.
How to use these charts when shopping listings
1. Pick the trailer category that costs you the most.
- Height constraint: step deck, lowboy, double drop
- Freight protection: dry van, reefer, Conestoga
- Load length: extendable
2. Confirm the “market standard” sizes first.
- 53 ft length and 102 in width often keep dispatch flexible. Use empty weight as a decision lever.
- Heavier trailer can reduce payload and revenue on dense freight.
- Lighter trailer can increase payload but may change durability or feature set.
3. Validate your lanes.
- Height rules vary by state because there is no federal height standard.