Ten reasons why EN 1004 standard ensures the right tower for the job

1. EN 1004 towers are designed, tested and supplied with safety in mind

2. EN 1004 towers have the right quantity of components for safe assembly and use

3. Correct size and quantity of stabilisers supplied with the tower – not an optional extra – prevent overturning

4. Safe to climb – EN 1004 towers are designed to be climbed on the inside

5. Instruction Manuals are included as part of EN 1004 certification

6. Maximum distance between rest platforms is 4m

7. Safe method of assembly ensures no standing on unprotected platform

8. Selecting EN 1004 certificated towers shows you take safety seriously

9. Recognised internationally by major towers manufacturers

10. PASMA training courses teach skills to build, use and dismantle an EN 1004 tower

Key features

Legs & Castors

Adjustable legs are used at the base of the tower and are used to ensure the tower is level and it is usual for at least one leg at minimum adjustment. To gain extra height you should always add extra frames. Castors or base plates can be used with adjustable legs; castors are selected when the tower needs to be moved, base plates are used for a static tower.


The use of stabilisers are determined by a complex calculation in EN1004 and the only way for determining if stabilisers are required and which size to use is to follow the manufacturer’s instructions schedule of components – remember to fit stabilisers as soon as possible when building and remove as late as possible when dismantling towers.


Frames are available in different widths and heights – frames may incorporate a ladder or it could be supplied separately to gain access to the platform level, generally the smallest frames are used at the bottom of the tower


Platforms are an essential part of a safe mobile access tower; the right platform always provides

  • a safe access method
  • includes a self-closing trapdoor to prevent an open space on the platforms
  • has a label details the weight loading of the platform and tower
  • includes a windlock to prevent accidental lifting of the platform

Toe board must be fitted to the working platform and any other platform where a risk assessment has shown that there is a danger of materials falling from that platform and injuring a person below. That risk may exist even at low platform heights.

Inspecting towers


Towers must be inspected as often as is necessary to ensure safety.

  • after assembly
  • after significant alteration
  • before use
  • following any event likely to have affected the towers stability or structural integrity.

Re-inspect the tower as often as is necessary to ensure safety but at least every 7 days and issue a new report each time

Towers moved only need to be re-inspected if it was necessary to significantly alter the tower to make that movement or if anything happens when moving it that may have affected its safety.

To help with Inspection and Maintenance procedures, PASMA has produced a pocket card and posters explaining the inspection requirements for mobile towers

Recording Inspections

PASMA recommends that all tower inspections are recorded, and that these records are retained

PASMA has produced a Tower Inspection Record which gives a visual indicator of the tower’s inspection status and can be attached to the tower

PASMA is a registered trademark with the UAE Ministry of Economy and certifiably recognised by the UAE Ministry of Labour Occupational Safety and Health Administration.

PASMA Head Office & Administration Centre – PO Box 26969. Glasgow, G3 9DR, United Kingdom.
Prefabricated Access Suppliers’ and Manufacturers’ Association is a Company Limited by Guarantee – registered in England No. 1397880 – Registered VAT no. (GB) 759 733 678

©2018, All rights reserved, PASMA