You’re Heavier Than You Think

By Christopher Green, UP2IT Access Hire · 15 November 2026 · 6 min read

Ask a tradie how much they weigh and you’ll get a number from the bathroom scale. Taken at 6am. Before breakfast. In undies. After a big Friday sweat at touch rugby. Possibly in 2019.

Now put that same person on a scissor lift at 10am in boots, hi-vis, harness and a tool belt that would make Batman jealous, holding a coffee, with a sausage roll on board and a box of fixings at their feet. The platform doesn’t care what the bathroom scale said. It only cares what’s actually on it.

The short version

• Platform limits are lower than most people think. Many small slab scissors are rated around 230 kg in total: people, tools and materials.
• Your “working weight” is your body weight plus 10 to 20 kg of boots, PPE, tools and lunch.
• Two average Kiwi blokes with gear can fill a small scissor before a single sheet of material goes on.
• Extension decks and booms at full reach often have even lower limits.
• Read the decal, do the maths, and send materials up in smaller loads.

Step 1: the honest body weight

This isn’t a diet article, and nobody at UP2IT is in a position to lecture anyone about pies. But the numbers matter. In the 2022/23 New Zealand Health Survey, the average adult man weighed about 88.5 kg for European/Other, 95.6 kg for Māori and 106.9 kg for Pasifika men (Figure.NZ). Construction is a physical job, and plenty of that is muscle. Muscle still counts.

For our sums below, we’ll use a pretty typical site worker: 95 kg. If you’re reading this thinking “that’s not me”, good. Now go and weigh yourself in your work gear.

Step 2: get dressed (it all counts)

These are rough, typical weights. Your gear may be lighter, or a lot heavier if you’re the one who carries everything “just in case”.

Step 3: breakfast and the “just in case” kit

Your real working weight

95 kg body + 8 kg dressed + 15 kg tools and tucker = about 118 kg

That’s 23 kg more than the bathroom scale said, and you haven’t picked up any materials yet.

Step 4: now add the materials

Materials are where platforms really get overloaded, because nobody weighs them. A few common examples (approximate):

• Sheet of 10 mm plasterboard, 2.4 × 1.2 m: around 20 kg.
• Sheet of 17 mm ply, 2.4 × 1.2 m: around 25–30 kg.
• Box of screws or anchors: 5–10 kg. Small box, surprisingly heavy.
• Bucket of plaster, paint or sealant: 15–25 kg.
• Cable drum, pipe lengths, brackets, duct: it adds up quickly. Weigh it, don’t guess.

Step 5: the maths that catches people out

Here’s a normal morning on a small slab scissor rated at 229 kg, a common rating for this size of machine (Skyjack spec sheet):

Nobody on that platform would say they were overloading it. They’d say “there’s two of us and one sheet of gib”. That’s exactly the problem.

Where the limits get even tighter

• Extension decks. The roll-out deck usually has its own, much lower limit. On many small scissors it’s around 113–120 kg, roughly one person with gear (Skyjack; Sinoboom).
• Outdoors. Some scissors are rated for two people indoors but only one outdoors because of wind loading (Sinoboom). Check the decal for both numbers.
• Booms at full reach. Many booms have two ratings: a higher one with the boom closer in and a lower one at full outreach. Load it for the zone you’ll actually work in, not the best case.
• Point loads. Stacking everything in one corner or on the extension deck stresses the machine more than spreading it out. Keep heavy items low and central.

Why it matters (the serious bit)

Overloading reduces the machine’s stability margin. On a scissor that can mean tipping on a slope or in a gust. On a boom it can mean tipping at full reach. Overloaded platforms also stress the structure, hydraulics and brakes, which shortens the machine’s life and can lead to failures.

Many modern machines have an overload sensor that stops the platform working if there’s too much weight on it. If the alarm goes off, it’s not broken. It’s telling you the truth. Don’t try to beat it.

How to stay under the limit

1. Read the decal. Find the platform capacity, the extension deck capacity, the maximum number of people and any indoor/outdoor difference.
2. Use your working weight, not your bathroom weight. Add 20 kg to what you think you weigh and you’ll be close.
3. Weigh the materials. Check packaging or supplier data, or put a sample on a scale. A quick check beats a guess.
4. Send materials up in smaller loads. Two trips with half the load is safer than one trip over the limit.
5. Leave the extras on the ground. The full chilly bin, spare tools and the box of everything don’t need to go up.
6. If it doesn’t add up, get a bigger machine. A larger scissor or a boom with more capacity costs less than a tipped machine.

Quick platform load checklist

☐ Platform capacity read off the decal

☐ Extension deck limit checked if you’re using it

☐ Number of people within the indoor/outdoor rating

☐ Each person’s working weight estimated, including gear

☐ Materials weighed or checked against supplier data

☐ Load spread evenly, heavy items low and central

☐ Boom loaded for the outreach zone you’ll work in

☐ Unneeded tools, food and gear left on the ground

Need more capacity?

UP2IT Access Hire supplies serviced, certified small and large slab scissors, rough terrain scissors and booms across Auckland from our Penrose depot, delivered on our own trucks. Tell us how many people are going up, what they’re taking with them and how high they need to go, and we’ll match a machine with the capacity to suit. We also offer free site inspections and EWP operator training.

Call 0800 830 530

Book EWP operator training →

Weights in this article are typical estimates for illustration. Always use the capacity on your machine’s decal and in the manufacturer’s operating manual, and follow your site safety plan and current WorkSafe NZ guidance.

Sources

• Figure.NZ – Mean weight of adults in New Zealand (NZ Health Survey 2022/23)
• Skyjack SJIII 3219 scissor lift specification
• Sinoboom scissor lift specifications
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