Graf SAPHIR Notice D'installation Et D'utilisation page 22

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6. Installation and assembly
6.2.3 Installation below HGV-bearing surfaces
The shaft can only be driven over with HGV in
conjunction with a self-supporting, iron-reinforced
concrete bridge. To ensure that no additional forc-
es or effects of HGV-bearing are transferred to the
shafts, the dimensions and strength of the concrete
bridge must be statically calculated.
max. 500
6.2.4 Installation next to driven-on surfaces
If the shafts are installed next to roadways used by
>H
heavy vehicles weighing over 3,5 t, the minimum
distance from these surfaces must be at least the
depth of the trench.
H
6.2.5 Connecting multiple shafts
Two or more shafts can be connected by means of
drilling a hole in each tank and installing, GRAF
special seals and 110mm underground pipe (pro-
>500
vided by the customer).
The openings must only be drilled with the GRAF
special core drill and to the appropriate size. En-
sure that the distance between the shafts is at
least 500 mm. The pipes must extend at least
200 mm into the shafts.
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