Working Height vs Platform Height Explained

Two numbers. One of them is misleading.

Every scaffold tower spec sheet lists two heights. On the Hireload range they look like this:

• MiTower — platform 4m, working height 6m
• 3T Tower — max working height 10.2m (platform around 8.2m at max)
• Twin-Access — max platform height 12.2m (working height around 14.2m)

Ask someone what “6m working height” means and most people say “I can work on something that’s 6m up.” That’s not quite right, and the difference between “not quite right” and “wrong” is the difference between finishing the job on Tuesday and finishing it on Wednesday.

The 2m rule

Working height is platform height plus the average reach above the platform — which the industry sets at roughly 2m. That’s not how high you can stretch (that would be much more). It’s the height at which an average adult can comfortably and safely work while standing on the deck, arms extended upward. So a 6m working height = 4m platform + 2m reach above. It’s a useful number — if your job is “paint a ceiling that’s 6m up” and you’re standing on the deck painting upward, working height is the number you match. The deck at 4m, you reaching up to 6m, roller on the ceiling. Job done.

Where it goes wrong

Working height stops matching the job the moment you’re no longer working above you. If you’re working on something at eye level, platform height is the number. Fitting a sign at 4m? Your feet need to be at 4m, not at 2m reaching up. “4m working height” gets you a platform around 2m — you’ll be reaching, you’ll be unstable, and you won’t have the leverage to fit anything heavier than a sticker. If you’re working on something below eye level from the deck, platform height again. Replacing a light fitting that hangs from a 5m ceiling with the fitting itself at 4.5m? Your deck at 4m puts the fitting at chest height — comfortable. Trust platform height. If you’re working above you, working height is the number. Painting a 6m ceiling? Working height 6m is right. The test: if the thing you’re working on is at or below your head, match platform height to where your feet need to be. If you’ll be reaching up to it, working height is the useful number.

A worked example

A London shopfitter calls to hire a tower for a 5m shopfront sign install. The sign itself is fixed at 5m — top edge at 5.5m, bottom edge at 4.5m, mounted with brackets that need to be bolted through the fascia. Wrong read: “5m working height sounds about right — hire a MiTower (6m working height, some margin).” What happens on site: the MiTower platform is at 4m. Operator’s shoulders at about 5.5m. Fitting the bottom of the sign is fine. Fitting the brackets at the top means reaching up with two hands full — a drill and a bracket — and tightening fixings above head height at full extension. Slow, awkward, and tiring by the end of the day. Correct read: Match the platform to where you need to stand. If the bracket is at 5m, platform should be roughly 4–4.5m. In this case, the MiTower is actually about right — but for a different reason: not because the working height matches the sign, but because the platform gives comfortable working height for bracket fittings around 4.5–5.5m. For signs fixed higher — say a 6–7m fascia — the MiTower platform at 4m is too low. The Miniscaff Solo (4.2m platform, 250kg SWL for bracket hardware) is closer, and for anything higher, the 3T Tower (up to ~8.2m platform) covers it.

Quick reference

The job	Match this number
Ceiling work (painting, plastering, coving above head)	Working height
Overhead reach (drilling upward, cable runs under ceiling)	Working height
Sign / fascia install at specific height	Platform height
Light fitting / pendant replacement	Platform height
Window / door install at upper storey	Platform height
Facade render / paint at specific height	Platform height
Inspection where you need to be level with the surface	Platform height

The mistake that costs a day

The classic error: someone has a 6m ceiling to paint and hires a tower with “6m working height.” Then the job turns out to also need a sign fitted at 5m on the same visit. The 4m platform isn’t high enough to fit the sign comfortably, the return of the tower is booked for 5pm, and the sign job gets pushed to a second visit. If you can, match the tower to the highest platform you’ll need on the job — not the highest working height. You can always work below the platform, but you can’t work above it.

How Hireload lists tower heights

Every scaffold tower page on the site shows both numbers. The top-level spec in the product heading is whichever number is most useful for selection:

• Ceiling/overhead-focused towers — working height leads (MiTower 6m, Folding 8.1m)
• Platform-focused towers — platform height leads (Twin-Access 12.2m, Stairwell 11m)
• Range towers — both listed (3T 10.2m max working, 8.2m max platform)

If in doubt, match platform to where your feet need to stand, then check working height covers anything you’ll be reaching up to.

Still not sure?

Call the hire desk with a one-line description of the job. “Fitting a sign at 6m on a shopfront” is enough — we’ll tell you which platform height to hire and which tower delivers it. Browse scaffold towers Or read: Which scaffold tower do I need? A height, space and job guide