11
STOP
c) The bottom end of the safety rail of each tower section shall end
minimum 55 mm and maximum 100 mm below the rung fitting.
d) The safety rails of two consecutive tower sections shall be con-
nected by means of a flange connection kit.
e) The distance between the safety rails of two consecutive tower
sections shall be equal or less than the length of the flange con-
nection kit.
j) Use the supplied self-locking nuts at all times.
k) Ensure that each screw extends from the nut by at least half of the
thread diameter, or by at least 2 threads (apply the most restrictive
requirement).
A rail-stop shall be installed at the top and bottom of the rail, and at any
provisional point where the runner can unintentionally run off the rail.
l) Mount the top and bottom rail-stops on the safety rail, at the highest
and lowest travel points respectively.
m) The distance between top rung and the top end of the safety rail shall
not exceed 100 mm. The distance between the bottom end of the
safety rail and the ladder bottom/floor level shall not exceed 600 mm.
n) During the erection phase of the wind turbine tower sections (i.e. when
the tower sections are being connected vertically), a top rail-stop shall
be mounted on the safety rail at the highest point of each tower sec-
tion. This way, the technicians will be able to use the FPS during this
phase.
o) If the safety rail and the ladder are installed in a wind turbine tower
section before the tower is erected, their final position shall be adjusted
during the tower erection.
4.2.1
Safety rail at the tower flange connections
a) A rung fitting shall be mounted on the penultimate top and penultimate
bottom ladder-rung of each tower section (i.e. at tower flange connec-
tion).
b) The top end of the safety rail of each tower section shall end minimum
55 mm and maximum 100 mm above the second top rung fitting.
Length limits of the top and bottom ends of the safety rail
Bottom rung of
a tower section
Tower flange
Top rung of a
tower section
Top
rail-stop
Maximum
100 mm
Bottom
rail stop
Bottom rung of the
complete tower
Ma
xi
m
um
6
0
0 mm
Floor
Top rung
of the
complete
tower
55mm ≤ x ≤ 100mm
55mm ≤ x ≤ 100mm
MASTER 47840008 EN_CORREGIDO.indd 11
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