The aluminium scaffold tower working height you need is the highest point you must reach, and it is not the same as the tower's platform height. Many suppliers work on the convention that a person standing on the platform can safely reach about 2 metres above it, so you subtract roughly 2 metres from your highest work point to find the minimum platform height. Always confirm that allowance with the manufacturer before ordering.
Getting this wrong costs money and creates risk. A tower that is too short tempts people to stretch, stand on guardrails or improvise extensions. A tower that is far taller than necessary can add cost, weight and stability demands. This guide shows how to measure, calculate and check the height you need.
Working height, platform height and tower height: what's the difference?
Three measurements are often mixed up:
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Platform height: the distance from the ground to the surface where the worker stands.
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Working height: the highest point the worker can reach while standing on that platform. It is an estimate based on reach, not a structural dimension.
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Tower height: the overall height of the assembled tower. Guardrails usually sit above the platform, so tower height is greater than platform height.
Suppliers do not always label their products the same way. Before you compare towers, check which of these three measurements a listed height actually describes.
How do you calculate the working height you need?
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Measure the highest point you must work on, such as a ceiling, soffit, light fitting or wall edge, in metres.
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Choose a reach allowance. A common industry convention is about 2 metres above the platform. Shorter workers, awkward tools or overhead tasks may reduce what is practical.
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Subtract the allowance. Highest work point minus reach allowance gives the minimum platform height.
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Compare that figure with product specifications, not just the headline height in a product title.
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Allow a margin. Aim for comfortable reach, not a platform height that only just works.
Worked example (illustrative assumptions only)
Assume a painter needs to reach the underside of a soffit 4.6 metres above a level concrete floor, and uses a reach allowance of 2.0 metres.
Citizen Aluminium lists towers in height bands, including 2.3 m to 2.6 m and 2.7 m to 3.0 m. If the band figure describes platform height, the 2.3 m to 2.6 m band only just meets a 2.6 m requirement, while the 2.7 m to 3.0 m band leaves a margin. If it describes a different measurement, the answer changes, so confirm what each product page's height refers to before buying.
How do reach, worker height and the task change the result?
The 2 metre figure is an average, not a guarantee. These factors can move it:
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Worker height and reach: a shorter worker has less reach than the assumption allows.
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Task type: sanding overhead, installing fittings or using long-handled tools changes the comfortable reach zone.
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Tool and material position: items on the platform reduce standing space and affect how you move.
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Obstructions: beams, ducts and services may limit where you can stand or reach.
If your estimate falls close to a band boundary, choose the higher option or ask the supplier for guidance.
Why you should never improvise extra height
Standing on guardrails, balancing on buckets, overreaching sideways or adding makeshift extensions defeats the purpose of a guardrailed platform. Safe Work Australia's information sheet recommends guardrails, mid-rails and toeboards on working platforms, and it notes that prefabricated mobile scaffolds should be erected according to the manufacturer's specifications. If a tower must be altered, the same guidance says to contact the manufacturer or supplier.
Height also affects stability. The same sheet says the height from the bottom of the scaffold to the platform surface should be no greater than a multiple of the minimum base dimension specified by the manufacturer, and that ratios should be reduced or extra support provided in strong wind or with heavy loads. Taller is not automatically better, and the correct ratio comes from the product documentation.
Which tower configuration suits your required height?
Once you know the minimum platform height, narrow down your choice:
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Width: Citizen Aluminium's range includes narrow (0.7 m) and wide (1.3 m) towers. Our narrow vs wide comparison explains when each suits a worksite.
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Platform size: the 2.7 m to 3.0 m narrow base tower, for example, lists a 2500 mm x 600 mm platform with a hatch, four castor wheels, guardrails and braces.
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Included components: check which items come with the configuration, such as outriggers or kickboards, rather than assuming.
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Access route: measure doorways and corridors so the tower can reach the work area.
What should you check before choosing a tower?
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The height measurement each listing uses (platform, tower or working).
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The manufacturer's maximum height-to-base guidance for the configuration.
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Floor conditions: firm, level ground and no obstructions.
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Wind exposure if working outdoors.
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Who will assemble the tower. Safe Work Australia notes a licensed scaffolder is required where a person or object could fall more than 4 metres from the platform or structure, and that other tower work should still be done by a competent person.
Frequently asked questions
What is the difference between working height and platform height?
Platform height is where the worker stands. Working height is the estimated highest point they can reach from there, commonly about 2 metres higher.
How do I find the platform height I need?
Subtract your reach allowance from the highest point you need to work on. For a 4.6 m work point and a 2.0 m allowance, you need at least a 2.6 m platform.
Can I use a shorter tower and stretch?
No. Overreaching creates fall risk. Choose a tower whose platform allows comfortable reach.
Does Citizen Aluminium publish a working height for each tower?
Product pages list height bands and component details. Contact the team to confirm what a band measures and the working height it supports.
Get the height right before you order
Measure your highest work point, subtract a realistic reach allowance and confirm the result against the product specifications. Browse Citizen Aluminium's aluminium scaffold towers, or contact the team with your measurements and we will help you match them to a configuration.
