- At least two roof safety hooks in staggered arrangement are required to ensure secure fastening. For ladders with a length of up to 4.20 m, two load-bearing roof safety hooks are required.
- "One extra hook is required for each ladder section with a length of 2.00 m or 2.80 m
Hints and special features
- Supporting safety roof hooks must be fitted centrally on the rafters. Smallest rafter circumference: 60 x 80 mm.