Covering heights with telescopic dome shaft in green
areas
Max. covering heights 15000 mm with extension and
telescopic dome shaft.
Max. covering heights with cast telescopic dome
shaft (with class B cast cover) in areas with car traf-
fic (load up to 3.5 t).
Max. covering heights with truck telescopic dome
shaft (with Class D cover to be provided by custom-
er) in areas with truck traffic (load up to 40 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.
www.graf.info
2.
Installation conditions
Mini telescopic dome shaft
13 / 50
Maxi telescopic dome shaft +
Telescopic with cast Iron lid
750-950 mm
max. 1500 mm
>800 <1500 mm
>1000 <1500 mm
>800 <1500 mm
750-1050 mm