30 Tonne Excavator Dimensions: Reach, Width and Transport Numbers
A 30-tonne excavator is the workhorse of bulk earthworks: big enough to load out a cut in a few passes, still small enough to move between sites without a full abnormal-load escort. But its dimensions are what actually decide whether it can get onto your site and off it again, and those numbers are frequently guessed rather than checked.
This guide sets out the typical dimensional envelope of a 30-tonne class machine, explains how each figure is measured, and shows where the numbers collide with real-world constraints such as bridge limits, gate widths and trailer payloads.
The Dimensional Envelope of a 30-Tonne Class Machine
Published figures vary between manufacturers and between configurations, so treat the values below as a working envelope rather than a specification. A standard 30-tonne machine with a boom around 6.2 m and a dipper around 3.0 m will typically fall in these ranges.
| Dimension | Typical range | Measured how | Why it matters | Common constraint |
|---|---|---|---|---|
| Operating weight | 28,000 – 33,000 kg | With bucket, full fluids | Transport class | Low-loader payload |
| Transport width | 2,980 – 3,200 mm | Across track shoes | Route and permit limits | 3.5 m lane, some bridges |
| Transport height | 3,100 – 3,400 mm | To top of boom or cab | Overhead clearance | 4.0 m bridge limit |
| Transport length | 10,200 – 11,000 mm | Tracks to boom tip | Trailer bed length | Standard low-loader |
| Undercarriage length | 4,400 – 4,900 mm | Track frame end to end | Stability on the move | Working platform size |
| Max dig depth | 6,900 – 7,600 mm | Standard dipper | Job capability | Deep drainage, basements |
| Max reach at ground | 10,200 – 10,900 mm | From slew centre | Spoil placement | Single-handle working |
| Track shoe width | 600 – 800 mm | Standard fitment | Ground pressure | Soft ground, road protection |
Notice how close transport width sits to a 3.5 m lane. On public roads, a 3.2 m wide machine on a 2.5 m wide trailer occupies more than the standard lane, which is a permit and escort question, not a driving skill question.
Reading the Dimensions Correctly
Three traps catch people out. First, transport height depends on how the boom is folded — images in brochures often show a machine with the boom lowered, while the actual load may be taller. Second, the quoted width usually assumes standard shoes; wider shoes for soft ground increase it.
Third, the weight figure quoted for transport is often without the bucket or without fuel, because the bucket is carried separately on the trailer. Add both before you check the payload.
Standard vs Long-Reach Configurations
A long-reach or mass-excavation configuration changes everything. Longer booms push transport length well past 12 m and reduce the bucket size the machine can swing, while a mass-excavation boom shortens reach and increases breakout. The class name stays the same but the envelope does not.
Always request the dimension sheet for the specific configuration you are hiring or buying, not for the base model.
Transport Planning
Moving a 30-tonne machine normally requires a low-loader with sufficient deck length and a rated payload above the machine's working weight. Permits and, in many jurisdictions, an escort are triggered by width rather than by weight.
Plan the route before the move: check bridge ratings, overhead restrictions, roundabout geometry and any roadworks diversions. Low-loader moves that go wrong are expensive in delay and in reputation, and the cause is almost always a route survey that was skipped.
Site Access and Ground Bearing
A 30-tonne machine imposes far higher ground pressure than anything in the compact class, which is why it needs a prepared working platform. Soft ground should be assessed before arrival, and mats or a compacted stone platform used where necessary.
Check overhead as well as ground: power lines, site gantries and structural elements all need clearance for a machine whose boom tip can reach 8 m or more above track level.
Pre-Move Checklist
- Obtain the dimension sheet for the exact configuration, not the base model.
- Confirm transport width with the shoes fitted, and check permit thresholds.
- Measure transport height with the boom in the position it will actually be carried.
- Weigh the machine with bucket and fuel, or add both to the published figure.
- Survey the route for bridge ratings, overhead limits and roundabout geometry.
- Assess ground bearing and prepare a working platform before the machine arrives.
- Check overhead clearance on site for the full boom arc.
- Confirm the low-loader deck length exceeds the machine's transport length.
How the 30-Tonne Class Compares to Neighbours
Moving down to 20 tonnes saves roughly a third of the weight and brings the transport width inside most permit thresholds, but gives up around 1.5 m of dig depth. Moving up to 40 tonnes adds depth and production but pushes into multi-axle transport and much higher mobilisation cost.
The 30-tonne class sits at the point where a single machine can still be moved reasonably often while producing enough output for bulk work. That is why it is the default choice for general earthmoving contractors.
When Not to Use a 30-Tonne Machine
On tight urban sites, on finished ground, and on work where the excavation volume is small, a 30-tonne machine is the wrong tool. Mobilisation cost dominates the budget, access damage becomes a liability, and the extra production never gets used.
For service trenching, landscaping and domestic work, a compact machine does the job for a fraction of the mobilisation and leaves the ground intact. Choosing the smaller machine is not a compromise in these cases — it is the correct engineering decision.
Key Takeaways
Treat every dimension as configuration-specific, verify the weight with bucket and fuel, and plan the route as carefully as the job. The cost of a wrong assumption at 30 tonnes is measured in delayed mobilisation, damaged surfaces and permit problems, all of which are avoidable with a half-hour of measurement.
If the work turns out to be smaller than the machine implies, size down. The compact class reaches most of the same jobs at a fraction of the transport complexity.
Compare Classes Before You Mobilise
Most jobs that appear to need a 30-tonne machine can be handled by a compact unit working a little longer, and the transport saving is often decisive. The mini excavator collection lists the weight, width and reach of each compact class so you can check whether a smaller machine fits the job and the route. For demanding compact work the SDLE42 mini excavator tops the range, and the SDLE30 mini excavator offers a balance of reach and transport weight that suits most contractor fleets.
