MAS BFD FlexBelt Twin, Operating Instructions Manual

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Furthermore, the safety karabiners must be checked for proper locking. The entire lanyard
must neither be cracked nor frayed nor damaged. Even if the protective cover of the stretch-
type shock absorber is damaged, this part of the system must be replaced.
The user must make sure that one lanyard rope is always hooked to the object through the
safety karabiner. When climbing onto lattice towers, the lanyard rope that has been hooked
first is crossed. After crossing the first lanyard rope, the second lanyard rope is attached
above the user. Afterwards, the lanyard rope below the user is unclipped from the object and
carried along when climbing further upwards. After crossing the second lanyard rope, the first
lanyard rope is attached to the object again and the user unclips the second lanyard rope.
This technique allows for safe climbing onto lattice towers. For climbing down from a lattice
tower, the steps are repeated in reverse order.

Attention:
Never attach the lanyard ropes in a stretched way (one rope at the anchorage
point, the other one at the full body harness; stretch-type shock absorber not
hooked into the D-ring of the full body harness). This disables the function of
the shock-absorbing lanyard, resulting in a risk of death due to the failure of
the equipment in case of a larger fall distance.
Clearance below the user
The necessary clearance below the user is calculated as follows:
BFD
type:
Maximum length
of the
lanyard Clearance below the user when using one
anchorage point
at the height of the
rear D-ring at the height of the
footing (feet)
FlexBelt Twin 2 m 4.75 m 6.75 m
Twin SK 12 2 m 4.75 m 6.75 m
Twin 2 m 4.75 m 6.75 m
The lanyard with integrated stretch-type shock absorber of the BFD Twin XXL type has been
tested and approved for a total weight of up to 136 kg.
Depending on the total weight and the position of the anchorage point, the necessary
clearance is calculated as follows:
BFD
type: Maximum
length Total weight
in kg
Clearance below the user when using one
anchorage point
at the height of the
rear D-ring at the height of the footing
(feet)
XXL 2 m 100 4.75 m 6.75 m
XXL 2 m 136 5.75 m 7.75 m
3.2. Notes on horizontal use:
This BFD Twin lanyard with integrated stretch-type shock absorber has also been
successfully tested for horizontal use and a resulting fall over an edge. A burr-free steel edge
with a radius of r = 0.5 mm was used. This test demonstrated that the equipment is suitable
for being pulled over similar edges, e.g., rolled steel sections, wooden beams or clad,
rounded parapets.