For driving a conventional
tunnel, duct lengths of up to 50 m are used. For TBM in combination
with duct storage cassettes lengths of 100 m are used.
Suspension:
a.)
Longitudinally welded suspension apron made of ducting material with
brass grommets and galvanized self-locking hooks every 0,5 m.
Optimally 2 suspension aprons at an angle of 75° to each other.
Maximum diameter of suspension rope: 8mm.
b.)
With non continuous suspension apron; each
apron is 12 cm long and 0,5 m apart.
(Suitable for duct storage cassettes. The suspension hooks are not prefitted
but supplied separately.
