A scaffold stair tower using Alto Universal Stairs constructed on a building site.

Strength & Flexibility

ALTO Universal Stair

The ALTO Universal Stair is a heavy-duty aluminium scaffold staircase system designed to provide safe, compliant access for construction, industrial and maintenance environments. Manufactured in the UK, it offers hire companies, scaffolding contractors and specialist industries a reliable and durable alternative to ladders and traditional heavy galvanised steel temporary stair systems.

Originally designed for tube-and-fitting scaffolding, the Universal Stair can be installed across a wide range of lift heights and floor levels while maintaining level treads and secure access. Supplied pre-assembled for rapid installation, each stair unit unfolds quickly and can be fitted using standard scaffold tube fixings and a scaffolder's spanner.

Built without compromise, the ALTO Universal Stair is engineered for strength, long-term durability and dependable performance on demanding sites. Fully compliant with BS EN 12811 in all permissible configurations, it is available in six standard sizes, with non-standard options available to suit specialist applications.

The Universal Stair can also be supplied with a variety of interface connectors, including slab hangers for mounting stairs directly to structures, or specialist connectors that create extended stair flights for embankment and other challenging access applications.

New home under construction with Alto Universal Stairs used for access.

- Sizes -

An image of a 0.5m ALTO Universal Stair Unit with the scaffold tube hook option.

2 Tread Stair

430mm to 560mm

The 0.5m ALTO Universal Stair Unit - also known as a 2 Tread Universal Stair - has a lift height range of between 430mm and 560mm approx.

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An image of a 1.0m ALTO Universal Stair Unit with the scaffold tube hook option.

4 Tread Stair

730mm to 1000mm

The 1.0m ALTO Universal Stair Unit - also known as a 4 Tread Universal Stair - has a lift height range of between 730mm and 1000mm approx.

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An image of a 1.5m ALTO Universal Stair Unit with the scaffold tube hook option.

6 Tread Stair

1030mm to 1500mm

The 1.5m ALTO Universal Stair Unit - also known as a 6 Tread Universal Stair - has a lift height range of between 1030mm and 1500mm approx.

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An image of a 2.0m ALTO Universal Stair Unit with the scaffold tube hook option.

9 Tread Stair

1480mm to 2100mm

The 2.0m ALTO Universal Stair Unit - also known as a 9 Tread Universal Stair - has a lift height range of between 1480mm and 2100mm approx.

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An image of a 2.5m ALTO Universal Stair Unit with the scaffold tube hook option.

12 Tread Stair

1930mm to 2760mm

The 2.5m ALTO Universal Stair Unit - also known as a 12 Tread Universal Stair - has a lift height range of between 1930mm and 2760mm approx.

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An image of a 3.0m ALTO Universal Stair Unit with the scaffold tube hook option.

15 Tread Stair

2370mm to 3400mm

The 3.0m ALTO Universal Stair Unit - also known as a 15 Tread Universal Stair - has a lift height range of between 2370mm and 3400mm approx.

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- Features -

A close-up image of the Alto Universal Stair height adjustment bracket.

Variable Height.

Designed to give scaffolders a cost-effective stair access solution with practical, reliable and compliant equipment. The Alto Universal Stair copes admirably with varying lift heights and floor levels, giving level treads across the permitted range of stair angles.

A close-up image of the Alto Universal Stair tread

Rapid Installation.

Made to fit 48mm tube and fitting scaffolding. With this product you can quickly install a fully compliant stair access to your scaffold. The Alto Universal Stair can be installed using only a scaffolders spanner to operate the locking mechanisms.

Two Alto Universal Stairs used to create a staircase on a building site.

Complete Range.

The Alto Universal Scaffold Stair is available in 6 standard heights from stock. Non-standard widths & heights are also available as special order items.

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There are six models in the range covering lift heights from 0.5m to 3.36m making the Alto Universal Stair hugely versatile.

Alto Universal Stair Units accept both our own proprietary handrails and standard tube and fitting parts to allow creation of handrails to suit the site. Alto Universal Handrails are available for all models. They fold flat for transport, simply unfold, drop into the sockets and tighten the securing pins with a scaffolders spanner.


- Videos -

A screenshot from the Alto Universal Stair video

Universal Stair Install

A screenshot from the Alto Universal Stair video

Universal Stair Height Adjustment

A screenshot from the Alto Universal Stair video

Universal Stair Handrail Install

- Gallery -

Universal Stair FAQs

What is the ALTO Universal Stair?
The ALTO Universal Stair is a heavy-duty aluminium scaffold staircase designed to provide safe, practical access between scaffold levels. It is suitable for construction, industrial and maintenance environments and provides an alternative to ladders and traditional heavy galvanised steel temporary stair systems.


What type of scaffolding can the ALTO Universal Stair be used with?
The ALTO Universal Stair is designed for 48mm tube-and-fitting scaffolding. It can be installed using standard scaffold tube fixings and a scaffolder's spanner, making it suitable for a wide range of temporary scaffold configurations.


What lift heights are available for the Universal Stair?
The ALTO Universal Stair is available in six standard sizes covering lift heights from approximately 430mm to 3400mm. The range includes 2, 4, 6, 9, 12 and 15 tread stair units.


Can the Universal Stair accommodate different scaffold lift heights?
Yes. The Universal Stair is designed to accommodate varying lift heights within the permitted range of each stair unit. Its adjustable design allows level treads to be maintained across the permitted range of stair angles.


How is the ALTO Universal Stair installed?
Universal Stair units are supplied pre-assembled and unfold for installation. They are designed to fit 48mm tube-and-fitting scaffolding and can be installed using a scaffolder's spanner to operate the locking mechanisms.


Can handrails be supplied with the Universal Stair?
Yes. ALTO Universal Stair handrails are available for all models. The stair units can also accept standard tube-and-fitting components to allow handrails to be configured to suit the site. ALTO handrails fold flat for transport and are secured into the stair using pins.


Can the Universal Stair be used for applications other than standard scaffold access?
Yes. The Universal Stair can be supplied with different interface connectors for specialist applications. These include slab hangers for mounting stairs directly to structures and specialist connectors for creating extended stair flights for embankments and other challenging access requirements.


What is the difference between the ALTO Universal Stair and Fixed Scaffold Stairs?
The ALTO Universal Stair is designed for flexibility and varying lift heights on tube-and-fitting scaffolding. ALTO Fixed Scaffold Stairs are designed for specific system scaffolding configurations, including Cuplock and Allround systems, with fixed lift options.


If you are unsure which stair system is suitable for your project, contact ALTO Access Products for advice on the appropriate configuration.