Deck height and load height
Deck height is only one part of loaded height, but it is often the fastest way to separate plausible trailer families from poor fits. Start with measured load geometry, then compare where that geometry sits on each deck.
Start with the measured load
Use the actual transport condition—not a brochure dimension or operating pose. Attachments, blocking, tire or track compression and securement can all change the final envelope.
- Overall transport height
- Footprint and support points
- Lowest clearance point
- Required dunnage or blocking
Compare usable geometry
A lower deck does not help if the load footprint does not fit the usable well or if a transition conflicts with the machine. Compare the full shape of the deck, not one nominal height.
- Main-deck or well length
- Front and rear transitions
- Upper-deck restrictions
- Approach and breakover angles
Validate the complete route
A preliminary height target still needs route-specific verification. The tractor, suspension state, deck deflection and loading method affect the real combination.
- Measured loaded height
- Route clearance review
- Permit requirements
- Final equipment and engineering verification
Compare loaded states, not model names
The TK80ACS references distinguish loaded deck heights of 34, 38 and 40 inches. That difference belongs to the documented configuration. It is not a setting to apply to every trailer in the family. Record the reference, tyres and transport suspension condition before using the value. A lowbed brochure that omits its loading condition cannot automatically supply a verified loaded height.
- Keep the selected reference with the calculation
- Use the transported machine height
- Record dunnage separately
- Measure the assembled combination before dispatch
Make the height arithmetic auditable
For a load measured at 120 inches high, 2 inches of dunnage on a documented 34-inch loaded deck gives a static sum of 156 inches. These load measurements illustrate the arithmetic; they are not a route allowance. Highway Match leaves route clearance unresolved and requires explicit dunnage, including zero when none is used. Do not infer clearance from a trailer category or a photograph.
- Loaded deck + transported load + dunnage
- Keep measurement units visible
- Account for the actual configuration
- Record the remaining route-review questions