Ladders are made to order according to an individual project.

Ladders can be made of round (Klassik) or square (Akzent) pipes
and have rungs made of round or square pipes respectively.
Steps can also be wooden or painted stainless steel

The standard size of the ladder in height (from the floor to the center of the track) is up to 3500 mm.
Ladders can be made of higher heights – up to 5000 mm.

Link: https://www.bibliotheksleitern.de/indusrieleiter 

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