Spiral Tower Staircase
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 01-8063798, email sales@hermeq.ie or use our live chat feature between 8:00am & 17:00pm for help discovering our range.
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 SST Temporary Spiral Staircase can reach?
The staircase can be installed up to 18.5 meters, making it adaptable for various construction site needs.
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How many people can use the staircase at once?
It is designed to accommodate two people per flight simultaneously, ensuring efficient worker movement.
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What materials is the staircase made from?
The staircase is constructed from high-quality galvanised steel, offering corrosion resistance and long-term durability.
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How long does assembly take?
Depending on site conditions and height requirements, installation is typically completed within a few hours.
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Can the staircase be customised for specific site needs?
Yes, its modular design allows customisation for different heights and site layouts, making it an adaptable solution.
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