TBN: Alternative Stabilisation
INTRODUCTION
These guidance notes outline alternative stabilisation methods for use with Alto mobile access towers. They are not a substitute for a detailed Risk Assessment and Method Statement (RAMS), nor do they replace a formal design plan for the relevant temporary works. This document also does not replace proper industry training.
Only competent and trained personnel should undertake the erection, alteration, dismantling, supervision, or planning of mobile access towers—including the use of non-standard stabilisation methods. Where there is any uncertainty, further relevant training must be provided to ensure safe use.
For additional guidance, consult PASMA (www.pasma.co.uk | +44 (0)845 230 4041).
WHEN ALTERNATIVE STABILISATION IS REQUIRED
Properly constructed aluminium towers, built in accordance with BS EN 1004 and the manufacturer’s instructions, are inherently stable. However, there are circumstances where additional stabilisation may be required, such as:
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Restricted spaces preventing the use of standard stabilisers
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Unusual or uneven loads being applied to the tower
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Environmental conditions such as wind or sloping ground
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Increased tower height or cantilever configurations
ALTERNATIVE METHODS
Where standard stabilisers cannot be used—or are not sufficient—alternative measures must be considered. These include:
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Larger stabilisers or rakers
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Bracing off adjacent structures
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Buttresses for wider support
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Tying-in to fixed structures
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Ballast or kentledge to increase base weight
APPLICATION
Each stabilisation method has specific technical considerations. For example, Alto aluminium towers are designed with fully welded joints and 48mm extruded tubing, making them compatible with scaffolding components where appropriate. Other brands may not offer the same compatibility or structural strength.
Correct stabilisation improves both tower safety and compliance, ensuring operatives can work securely at height.