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Sharp edges
First of all,
we need to make a difference between sharp edge and angle:
- sharp edge is
the one that can cause the cutting of the connection.
- the angle of
the edge is more related to fall factor: up to 90° the use is
inclined/horizontal , when you get over 90° it means that the anchor will be
below the feet of the user so the fall factor is less than 1, and some devices cannot
withstand such fall factor. There are no
standards about the angle of edge: in this case you have to refer to the
instruction manual of the manufacturer.
EN standards and test methods
The EN standards do not prescribe test methods for sharp edges. So the group of coordination of notified bodies for fall arrest (VG11) found a way to test the horizontal/inclined use over sharp edge.
EN 360 - Fall arrester
CNB/P/11.060:
test method for sharp edges with edge radius more then 0.5mm.
CNB/P/11.054:
test method for very sharp edge with edge radius less than 0,5mm.
EN 355 - Lanyard with shock absorber
CNB/P/11.074:
test method for sharp edges with radius more then 0.5mm.
EN 353-2 - Guided type fall arrester
CNB/P/11.075:
test method for sharp edges with radius more then 0.5mm.