THE SHORT ANSWER
A forklift data plate states rated capacity at a standard 500 mm load centre and low lift height. The number that matters is the residual capacity for your actual mast height, load centre and attachments — always lower, and legally binding. If your heaviest load at your top beam height exceeds the plate's residual figure, the machine is wrong for the job regardless of the headline tonnage.
The plate is a contract, not a brochure
Every counterbalance forklift carries a data plate (capacity plate, load plate) — and in Victoria operating outside it isn’t a judgement call, it’s non-compliance. WorkSafe expects the plate to reflect the machine as configured: this mast, these forks, this attachment. Swap any of those and the plate must be re-issued.
The confusion comes from one habit: everyone quotes the headline number. “It’s a 2.5-tonne machine.” The plate exists precisely because that number stops being true the moment the load rises or lengthens.
The three numbers that matter
1. Rated capacity — the marketing number
What the machine lifts under standard conditions: usually a 500 mm load centre and low height, e.g. 2,500 kg. This is the number in the model name. It is not a promise about your pallet.
2. Load centre — where the lie begins
The rated figure assumes the load’s centre of gravity sits 500 mm from the fork face — a standard 1,165 mm Australian pallet, evenly loaded, just about fits that assumption. Long loads don’t: carry a 2.4 m bundle and the centre moves out to 1,200 mm, and capacity falls sharply. The plate shows this as a table or curve: capacity at 500 mm, 600 mm, 700 mm…
3. Residual capacity at height — the number that decides
Masts derate as they extend. A machine rated 2,500 kg at low height might legitimately show 1,800–2,100 kg at a 6 m top beam depending on mast and tyres. That figure — residual capacity at your working height — is the only number that decides whether your top racking level is safe. Our capacity and load centre guide works through the physics.
What changes the plate
- Attachments: a sideshifter or fork positioner adds weight ahead of the axle and moves the load centre forward — both eat capacity. The plate must show the machine with the attachment fitted.
- Mast choice: taller masts and full-free-lift stages derate more. Two “identical” 2.5 t machines with different masts can differ by hundreds of kilograms at height.
- Tyres: compound and profile affect stability and can alter the plate figures.
This is why we ask for your heaviest pallet weight, its dimensions and your top beam height before quoting — because those three numbers, read against the plate, are the entire safety case. Our FitCheck tool runs the same logic.
A 60-second plate check for any machine on your site
- Find the plate (usually on the cowl near the operator).
- Confirm it lists the attachments currently fitted. Missing attachment = invalid plate.
- Read residual capacity at your highest working level, not row one.
- Compare against your heaviest real load — the occasional double-stacked pallet counts.
- If the margin is thin or the plate is unreadable/absent, stop and resolve it — a replacement plate comes from the manufacturer or a competent engineering assessment, not a label printer.
On hire machines all of this is handled at delivery: the plate matches the delivered configuration, and if your loads change mid-term, tell us — re-plating or swapping the machine is our problem, not yours. That’s part of what fully maintained hire includes.