Mobile access tower safety

A mobile access tower is a prefabricated scaffold that can be moved on castors. It provides a platform for work at height, provided its complete configuration, supporting surface and protected access are suitable.

In brief

Stability depends on the model, components, ground and surroundings, not merely on applying the castor brakes.

Contents
  1. Select a suitable configuration
  2. Assembly and collective protection
  3. Movement and wind
  4. Checks before continuing
  5. Related concepts
  6. References

A–Z dictionary →

Select a suitable configuration

Working height, intended load and available space determine the choice. The tower must allow the task to be reached without ladders or boxes placed on its platform. If it is unsuitable, select another authorised configuration or access system rather than improvising extra height.

The instructions must match the model and be available to people assembling, altering and using it. They specify components, bracing and stabilisers. A generic height-to-base ratio is not a substitute for these instructions. Scaffolding explains principles shared with other scaffold arrangements.

Assembly and collective protection

Trained people assemble and dismantle the tower using its intended method, avoiding exposure on unguarded platforms. Components need to be compatible, complete and undamaged. Different systems must not be mixed merely because their tubes or connections appear to fit together.

The surface must support loads transmitted through the castors and other supports. Levelling, brakes and required stabilisers need checking. Guardrails, toeboards and internal access form part of the complete tower. Attaching a harness to the tower does not remedy missing collective protection and can introduce overturning risk.

Movement and wind

Moving a tower is a planned operation. Check changes of level, potholes, overhead obstructions, doorways and power lines, and use the transport configuration specified by the manufacturer. Do not move it with people or materials on the platform.

Wind can be stronger between buildings or inside partially enclosed structures. Sheeting, signs and large panels add wind-exposed area and can compromise stability. Do not add improvised coverings or adopt a wind limit taken from a different tower model. Conditions at platform level may differ from those observed at ground level.

Checks before continuing

Arrange inspection after assembly, at suitable intervals and after modifications or events that could affect safety. Relocation requires checks of the new support and surroundings; significant alteration or an incident may require the additional inspection set out in the arrangements.

Missing components, distortion, loss of level or defective brakes require work to stop. The person responsible needs reliable knowledge of the tower’s condition and permitted use, rather than relying solely on an old inspection label. Local legal requirements determine any mandatory inspection frequency and records.

References

  1. HSE — Tower scaffolds. Official source
  2. INSST — NTP 696: Torres de trabajo móviles. Official source
  3. PASMA — Safety FAQs. Official source
  4. PASMA — Inspection FAQs. Official source

Editorial information

Publication date: 2 November 2026.

Editorial responsibility: Sabentis Editorial Team.

Author: Pablo RodríguezLinkedIn

Executive Vice President of the ORP International Foundation and Chief Financial Officer of Sabentis.

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