Avanti Runner 2000 - Safety Rail at Tower Flange Connections; Tower Flange Safety Rail Installation

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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/oor 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 nal position shall be adjusted
during the tower erection.
4.2.1 Safety rail at the tower flange connections
a) A rung tting shall be mounted on the penultimate top and penultimate
bottom ladder-rung of each tower section (i.e. at tower ange 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 tting.
STOP
Top
rail-stop
Maximum
100 mm
Bottom
rail stop
Bottom rung of the
complete tower
Maximum 600 mm
Floor
Top rung
of the
complete
tower
c) The bottom end of the safety rail of each tower section shall end mini-
mum 55 mm and maximum 100 mm below the rung tting.
d) The safety rails of two consecutive tower sections shall be connected
by means of a ange connection kit.
e) The distance between the safety rails of two consecutive tower sec-
tions shall be equal or less than the length of the ange connection kit.
Length limits of the top and bottom ends of the safety rail
Bottom rung of
a tower section
Tower ange
Top rung of a
tower section
55mm ≤ x ≤ 100mm
55mm ≤ x ≤ 100mm