Two painters, their harnesses and a 20 litre pail of paint can put a knuckle boom over its rated load before the platform leaves the ground.
Most hire conversations start with height. Capacity only comes up when an alarm sounds and the machine refuses to lift, and by then the crew is on site with a job that needs extra trips, a second machine or a different lift.
We hire booms and scissor lifts to crews across Auckland every week, and capacity is the number we see overlooked most. It decides how many people go up, what they take with them, and often which machine suits the job.
What Platform Capacity Includes
The rated load on a lift is the total weight the platform is designed to carry. That covers everyone in the basket or on the deck, their clothing and PPE, every tool, and every material.
It is one combined figure, with no separate allowance for gear.
Each machine carries a placard showing its maximum load and number of people. Some allow fewer people outdoors or set a smaller limit for a roll-out extension deck. Check the plate, because two lifts with the same working height can carry very different loads.
Adding It Up Before You Book
Our knuckle booms are rated at 227kg. Here is how that opening example adds up.
- Two tradespeople at 90kg each: 180kg
- Boots, harnesses and tool belts, around 15kg each: 30kg
- One 20 litre pail of paint: roughly 25kg
That comes to 235kg. Eight kilograms over before anyone packs a sander or a bucket of water.
One person could go up while the other preps from the ground, or the crew could work from smaller pots. On a long job those extra trips add up to hours, and a bigger platform becomes the better answer.
If you are unsure what your gear weighs, weigh it. Bathroom scales in the yard take two minutes.
Knuckle Booms: Reach First, Load Second
A knuckle boom is built to get a person into awkward places, with jointed sections that take the platform up, over and down to clear an awning, carport or row of trees. When we set crews up with a knuckle boom lift hire, we talk through reach and setup position first, then what is going in the basket.
At 227kg, the platform suits one or two workers with hand tools for inspections, maintenance, electrical work, signage and touch-ups. Cladding, glazing and boxes of fixings fill it quickly.
Rough Terrain Scissors: Where The Load Goes
Rough terrain scissor lifts sit at the other end of the scale. Depending on the model, the machines we supply for rough terrain scissor lift hire carry between 500kg and 1,000kg, on a large deck with guardrails and non-slip flooring, at working heights of 10m to 14m.
That makes them the platform for crews who need materials beside them. Exterior painters with drums and spray gear. Cladding and façade crews. Several people can work from one deck with room to lay out the day’s gear.
The trade-off is outreach. A scissor lift only goes straight up, so it has to park directly beneath the work. If a garden bed, fence or sloping bank sits in the way, the extra capacity is no use to you. Our comparison of scissor lifts and boom lifts goes through that choice in more detail.
When Capacity Should Pick The Machine
A rule we use on the hire desk: if the job is mostly people and hand tools, start with reach and let a boom do the work. If the job is mostly materials, start with capacity and look at scissor lift hire first, then confirm the machine can sit under the work.
Some jobs need both. We often see crews run a rough terrain scissor along a flat elevation, with a knuckle boom for the corners and eaves. Two machines at full pace usually beat one that slows everyone down.
What Happens When A Lift Is Overloaded
Many modern lifts use load sensing. Overload the platform and the machine sounds an alarm and stops lifting until the weight comes off.
Extra weight affects stability, braking and the structure of the boom or scissor stack, and the effect grows with height, outreach and wind. Weight bunched in one corner or hung over a guardrail shifts the balance again.
There is no safe margin to borrow from. The rated load is the limit.
Common Capacity Mistakes We See
Counting Heads But Not Gear
A harness, tool belt, drill and spare batteries add weight for every person on the platform.
Hanging Materials Off The Guardrails
Buckets, cable reels and lengths of spouting hung over the rail put weight outside the platform. Everything should sit inside the basket or on the deck, secured.
Loading The Extension Deck Like The Main Deck
Roll-out decks often carry a lower limit of their own. Keep heavy materials on the main deck.
What To Tell Us Before Hiring
- How many people need to work from the platform at once
- The tools and materials going up, with rough weights where you know them
- Working height and any outreach needed
- Photos of the work area and the ground the machine will stand on
- Indoor, outdoor or both
- How long the job will run
Mention longer jobs early. Hires of three weeks or more come with free delivery and collection, which changes the numbers on running two machines.
Getting The Load Right From The Start
Not sure if the job suits a boom or a scissor lift? Call us before you book. Tell us who is going up and what they are taking, and we will work out the machine with you.
Height gets the lift to the job. Capacity decides how well the job goes once you are up there.