MAS BFD FlexBelt Twin Manual Del Usuario página 10

Furthermore, the safety karabiner hooks must be checked for a correct locking. The entire
lanyard may not be torn, abraded or faulty. Also in case of damage to the protective cover of
the shock absorber, this subsystem is to be replaced.
The user must ensure that a lanyard middle section is basically always hung on the object
with the safety karabiner hook. In case of climbing lattice towers, the first hung up lanyard
middle section is climbed over. After climbing over the first lanyard middle section, the
second lanyard middle section is attached above the user. After this, the lanyard middle
section located below the user is detached from the object and carried up while climbing.
After climbing over the second lanyard middle section, the first is again attached on the
object and the user detaches the second lanyard middle section. With this technique the
lattice tower can always be climbed safely. The descent of a lattice tower is implemented in
reverse order.
Caution:
Never attach the lanyard middle section stretched (one section on the anchor point, the other
one on the full body harness, shock absorber not hung in the reception eyelet of the full body
harness). In this way, the function of the strap fall absorber is taken out of operation and
danger exists of failure of the equipment in case of long falls.
Clearance below the user
The required clearance below the user is worked out as follows:
BFD Maximum length
Type of the lanyard
.
FlexBelt Twin
Twin SK 12
Twin
3.2. Usage when used horizontally:
This BFD-Twin lanyard with integrated shock absorber has been also been successfully
tested for horizontal use and hence, a simulated fall over an edge. A steel edge with radius R
= 0.5 mm, without burr, was employed in this case. Based on this test, the equipment is
suitable in corresponding composition to be used over similar edges (inquire with the
manufacturer about this), such as are existing for example on rolled-steel profile sections, on
timber beams or on encased, rounded roof parapets.
Regardless of this test, in the case of horizontal or angular use, where there is a risk of a fall
over an edge, the following points must be taken into consideration:
1. If the risk assessment carried out before the start of work indicates that the fall-zone
edge relates to a particularly 'cutting' and/or 'non-burr free' edge (e.g. an uncovered
parapet, trapezoid sheeting or a sharp concrete edge) then
• appropriate arrangements should be made before the start of work so that a
fall over the edge is ruled out
an edge protector should be installed before the start of work or
• contact should be made with the manufacturer.
2. The lanyard is tested over an edge with an angle of 90°. The user should be clear
about the increased hazards that exist when it is possible to fall over an edge with an
angle of less than 90° (measured between the two side pieces of the fastener e.g. if
the attachment point is located below the feet of the user or, in the case of a roof
running upwards, at an angle) and that additional preventative measures or additional
tests may be necessary.
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Clearance below the user for an attachment
at the height of the
ridge harness eyelet
2 m
2 m
2 m
point
at the height of the base
(feet)
4.75 m
4.75 m
4.75 m
6.75 m
6.75 m
6.75 m