Rail (0.5 m height) at the access hatch and around skylights etc. form supports when ascending/descending to the roof and shall prevent people from going onto roof areas that cannot withstand the weight of a person.
They are also approved for the anchoring of personal fall protection according to SS 831333.
The fold bracket can rotate and is used when a seam has an oblique angle from the others, e.g., between the roof and the pitch in different directions