EN 1004 Tower Standard

Find out about the latest changes to the new EN 1004 standard for Mobile Access and Working Towers.

Why do we certify our towers to EN 1004?

  • It demonstrates our commitment to ensuring BoSS towers have gone through rigorous testing to provide maximum safety for the end user.
  • It ensures that materials, dimensions, design loads, safety and performance requirements conform to safety standards.

What has happened?

A new version of EN 1004 was released in 2020

  • There was a transition period of 12 months from the date the new Standard requirements are released. During this time, product modifications were made and tests were undertaken to ensure all products that fall into the scope of the EN 1004 Standard conform and are certified.
  • All BoSS products have been put through 3rd party testing to provide additional levels of assurance through official certification.
  • EN 1004:2004 was withdrawn in November 2021.

What has changed in EN 1004:2020?

Towers under 2.5m

Tower builds under 2.5m were not previously included in the scope of EN 1004. The new standard now covers ALL towers below 2.5m.

  • Any towers from the ground up require additional components to conform to the new Standard, so the build method and quantity schedules of our low-level towers have been assessed and updated.
  • Maximum heights remain at 8m externally and 12m internally.


Any size tower

Making Mobile Towers even safer

  • Reduced maximum distances between platform levels: From 4.2m to maximum 2.25m
  • Shorter distance from the ground to the first platform of the tower: From 4.6m to maximum 3.4m
  • Measures to prevent castors falling out
  • Wind locks on both ends of the platform
  • Updated wind and gust load guidance during structural calculations of the tower
  • Increased guidance of material specifications


Reduce distance of possible fall


More safeguards


BoSS access towers have typically always had a distance of 2m between platforms to provide maximum user safety when working at height.

Innovation opportunities in low-level access products

  • We can now develop towers with access from the outside of the structure where the working platform is below 2m


From the ground up

How do I know if my tower is in the scope of the new EN 1004-1:2020 Standard?

The tower meets the following criteria:

  • Single bay structure with four legs
  • On castors not baseplates
  • May be supplied with stabilisers
  • One working platform at a time
  • Easy to relocate / dismantle
  • Should not be used with personal fall arrest
  • Dimensions are fixed by design
  • Built-in means of access
  • Can be made of various materials, not just aluminium
  • Built at heights from 0m to 8m / 12m
  • Maximum wind-load requirements

How do I tell if a product complies to the new standard?

Look on the product – the label should state the standard

Check the Instruction Manuals


Can I mix and match components?


When you combine components from different manufacturers, a new structure has been created that has not been tested to the safety standard and therefore does not comply. Although it may appear that all access towers look the same and components may be similar to each other, the actual characteristics and performance of the components can be very different. It’s important to remember that in EN1004:2020 it is not the components that are approved it is the overall tower structure. Read our full notice regarding tower component compatibility here.

Can I use towers that do not comply to the new standard?

From November 2021, any new towers purchased should comply to the new standard.

However, you may continue to use any existing tower products that comply to EN 1004:2004 as long as they are in suitable condition. You should always refer back to the user manual supplied to check your product requirements are up to date.


EN 1004-1:2020 Guide

Download our detailed guide highlighting all the key changes in the lastest Standard.


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