Calculator Inputs
Formula Used
Maximum Cargo Height = Route Height Limit − Trailer Deck Height − Pallet Height − Clearance Margin − Suspension Allowance − Packaging Allowance
This method estimates the tallest safe cargo block that can be loaded without exceeding a route or infrastructure height restriction. Add conservative safety margins when route data is incomplete or bridge clearance varies.
How to Use This Calculator
- Enter the legal or operational route height limit.
- Enter trailer deck height from ground to deck surface.
- Add pallet, skid, or base support height.
- Include top clearance for vibration and route uncertainty.
- Add suspension compression and packaging allowances.
- Select meters or feet, then calculate.
- Review maximum cargo height, status note, and chart.
- Export the results as CSV or PDF if needed.
Example Data Table
| Scenario | Route Limit | Deck Height | Pallet Height | Clearance | Suspension | Packaging | Max Cargo Height |
|---|---|---|---|---|---|---|---|
| Urban Delivery | 4.20 m | 1.20 m | 0.15 m | 0.10 m | 0.05 m | 0.08 m | 2.62 m |
| Regional Freight | 4.50 m | 1.30 m | 0.12 m | 0.10 m | 0.04 m | 0.06 m | 2.88 m |
| Low Clearance Route | 3.90 m | 1.15 m | 0.14 m | 0.12 m | 0.05 m | 0.05 m | 2.39 m |
Frequently Asked Questions
1. What does max cargo height mean?
It is the tallest cargo block you can load after subtracting trailer structure, pallet base, safety clearances, and dynamic allowances from the permitted route height.
2. Why should I include clearance margin?
Clearance margin protects against route data errors, road camber, bouncing, uneven loading, and infrastructure variation. It adds a practical buffer for safer dispatch planning.
3. Does pallet height count against cargo height?
Yes. Pallets, skids, load bars, and support bases raise the cargo. They consume available height, so they must be subtracted before estimating maximum freight height.
4. What is suspension allowance?
Suspension allowance covers vehicle movement under load, road shocks, and compression. It helps prevent overheight incidents when the truck settles or rebounds during travel.
5. Can I use feet instead of meters?
Yes. The calculator accepts meters and feet. Internally it converts values consistently, then displays the result back in your selected unit.
6. What happens if the result is negative?
A negative result means your deck, pallet, margins, and allowances already exceed the route limit. You need a lower trailer setup, different packaging, or another route.
7. Is this enough for legal compliance?
It is a planning tool, not legal advice. Always verify regional height laws, permit requirements, bridge data, and carrier operating procedures before moving the load.
8. When should I export the results?
Export when you need a dispatch note, customer quote backup, loading instruction, or internal record showing the assumptions used for route height planning.