Modular stairs
Unique access systems with security barriers
Safety fences - collective means of protection. Works on sites with a protective fence are not works at height!
The use of modular access systems with security guards provides:

access to the workspace with the highest level of security,
no need to use safety systems, and therefore any PPE: anchor lines, leashes, lines, intrusion protection means, etc.

Modular ladders are unique access systems with a security fence, both stationary and mobile (mobile platforms). The design of modular systems consists of only 5 elements.