Covering heights with telescopic dome shaft in
green areas
Max.
covering
heights
telescopic dome shaft
It is generally recommended that a drain line is
installed.
Covering heights with cast telescopic dome shaft
(with class B cast cover) in areas with car traffic
(load up to 3.5 t).
Covering heights with truck telescopic dome shaft
(with Class D cover to be provided by customer) in
areas with truck traffic (load up to 12 t).
The tanks can be only partially installed into the
groundwater. If it is to be expected that the ground
water could rise higher, even occasionally, as
shown in the figure opposite, the ground water
must be discharged via a drain line.
It is generally recommended that a drain line is
installed.
www.graf.info
2.
Installation conditions
with
extension
and
12 / 36
Maxi telescopic dome
Mini telescopic dome
shaft
Telescopic with cast iron
shaft +
lid