Set of staircases and safety cage ladders on dome

Client request: Access in safety on a dome to do various maintenance operations.

FORTAL solution: Design, manufacture and assembly of three aluminum staircases - total length of 48 560 mm. Each staircase is composed of:

• five staircase modules and a small inclinaison angle staircase module. The length and inclinaison angle are according to the shape of the dome.
• six intermediary landing platforms with two security gates each allowing operators to access on windows dome.
• a landing platform with a security gate

Each staircase is accessible through safety cage ladders. Twelve ladders for descending into the gutters complete the achievement. All accesses ensure the operators safety at all times during maintenance operations.