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Product Highlights
- Modular construction - Adapts to varying excavation depths.
- Spiral footprint - Ideal for narrow or restricted spaces.
- Anti-slip surface - Ensures safe use in wet or muddy conditions.
SKU WO89991z-2
The Spiral Tower Staircase is a robust, modular access solution designed specifically for the groundworks and shoring industry, offering fast, safe access to deep excavations, trenches, and below-ground work zones. Fully compliant with BS-EN 12811, it provides a superior alternative to ladders and makeshift access routes, reducing trip and fall hazards while improving the movement of operatives, tools, and materials in confined or uneven terrain.
Spiral Tower Staircase offers a modular, heavy-duty stair system specifically designed to provide safe access into and out of excavation sites, utility trenches, and other confined ground-level environments. Fully compliant with BS-EN 12811, it supports operatives, tools, and materials moving vertically without the risks of unstable ladders or improvised walkways.
Engineered for rapid deployment, the staircase can be quickly assembled and adjusted to suit excavation depth and layout. Its crane-liftable design allows for easy repositioning as the site evolves, making it ideal for projects involving sheet piling, trench boxes, or cofferdams, where reliable access is critical for safety and efficiency.
Key Features & Benefits
- BS-EN 12811 certified for use in temporary works, shoring, and groundworks environments.
- Spiral structure fits deep, narrow excavations with minimal footprint.
- Fast installation and breakdown—ideal for phased trenching or multi-zone excavations.
- Grippy stair surface with enclosed handrails prevents slips, even in wet conditions.
- Enables two-way operative movement, improving workflow and site safety.
Product Information
This access tower is frequently used in deep trenching operations, pipe laying, or subterranean build phases where space is limited and fall risk is high. It outperforms ladders in every key metric: stability, compliance, and operative confidence.
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| Module | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Height (mm) | 2480 | 4760 | 7040 | 9320 | 11600 | 13880 | 16160 | 18440 |
| Width (mm) | 1600 | 1600 | 1600 | 1600 | 1600 | 1600 | 1600 | 1600 |
| Weight (kg) | 307 | 534 | 761 | 987 | 1214 | 1441 | 1667 | 1894 |
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Popular Uses & Applications
Ideal for groundworks contractors, utility providers, and civils firms operating in deep shoring environments. Used extensively where quick site entry is needed without compromising compliance or causing ground disturbance.
Also valuable during reinstatement works or inspection projects where vertical access must be established quickly and securely for rotating site teams.
Alternative Products
If less vertical access is required, consider the Temporary Trench Stairway. For level trench bridging, the Temporary Trench Bridge offers horizontal pedestrian access.
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HERMEQ stocks a wide range of equipment for Working at Height including Edge Protection Systems, Fall Arrest Systems, and Harnesses & Lanyards conforming to all required safety specifications and regulations.
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Contact our team via phone 0800 043 2520, email sales@hermeq.com or use our live chat feature between 8:00am & 17:00pm for help discovering our range.
Temporary stairway and spiral staircase systems are essential for safe vertical access across excavation and groundworks sites. The Spiral Tower Staircase is designed to exceed the capabilities of standard temporary stairs, offering enhanced stability, compliance, and modularity.
Each module of the Spiral Tower Staircase provides a height increment, enabling flexible configuration from shallow to deep trench access—up to 18.5 metres. The 1600mm wide spiral staircase ensures adequate clearance for operatives and tools, with anti-slip surfaces and fully enclosed handrails promoting safe usage in all weather conditions.
Its crane-liftable design enables rapid deployment and repositioning across evolving work zones. This makes it particularly effective when used alongside temporary bridges and trench bridging systems, where combined vertical and horizontal access is required.
Typical applications include:
- Vertical access in deep utility trenches and cofferdams.
- Safe egress for operatives in shoring and sheet piling works.
- Complementary access alongside temporary bridges in phased excavation projects.
- Temporary stair solutions where space or ground conditions preclude conventional stairways.
- Rapid installation for inspection, maintenance, and reinstatement tasks.
HERMEQ Spiral Tower Staircases outperform ladders and basic temporary stair systems in both stability and compliance, helping contractors reduce fall risks while improving site access efficiency across complex excavation works.
| Module | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Height (mm) | 2480 | 4760 | 7040 | 9320 | 11600 | 13880 | 16160 | 18440 |
| Width (mm) | 1600 | 1600 | 1600 | 1600 | 1600 | 1600 | 1600 | 1600 |
| Weight (kg) | 307 | 534 | 761 | 987 | 1214 | 1441 | 1667 | 1894 |
What is the maximum height the Spiral Tower Staircase can reach?
The staircase can be configured up to 18.5 metres, supporting a wide range of groundworks projects.
How many operatives can use the Spiral Tower Staircase simultaneously?
Two operatives can safely use each flight at the same time, ensuring smooth site workflow.
What materials is the Spiral Tower Staircase made from?
Constructed from high-grade galvanised steel, the staircase offers excellent durability and corrosion resistance.
Can the staircase integrate with temporary bridges?
Yes, it works in tandem with temporary bridges and trench bridging solutions to provide safe and compliant site access.
Can this spiral staircase replace temporary stairs in confined spaces?
Absolutely. The compact spiral design is ideal where space is restricted and conventional temporary stairway systems would be impractical.
How fast can the Spiral Tower Staircase be installed?
Installation typically takes only a few hours, thanks to its modular and crane-liftable design.
