Commercial concertina or folding ladder including roof access hatch. Designed for safe,
controlled and easy access to the roofs of buildings, especially to access plant/equipment for maintenance on multi-level buildings. Can install so it is hidden from the view of the general public. More cost effective than hiring scissor lifts.
Read more here – https://roofspacerenovators.com.au/commercial-roof-access-ladder-and-roof-hatch/