Back-Fill And In-Fill The Stool; Sealing The Base - Siemens ST950 Handbook

Clean the top surface of the stool and the lower surface of the cabinet that will be in
contact when the cabinet is fitted. Apply a bead of silicone sealant around the edge
of the stool.
Apply silicone sealant (ref. part no. 996/4/22026/100
(enough to ensure that a good seal between the stool and the cabinet will be made.
The cabinet is installed by lowering it onto the stool and fitting the retaining bolts.
When fitting the cabinet onto the stool, make sure that all the cables are in their
correct position with regard to the CET bar. Once the cabinet has been secured,
moving of the cables could cause damage.

7.3.11 Back-fill and In-fill the Stool

On completion of the cable tests the controller cabinet and stool can be back-filled
by the civils team using the appropriate material for the site layout. Once the back-
fill is completed in-fill with kiln dried sand , taking care that the compacted sand is at
ground level when finished.
If any of the cables were replaced or moved during the installation of the controller
cabinet then the kiln dried sand in-filling must be made good before the sealing
compound is introduced.
NOTE: The back-fill must be brought to a level such that once the decorative top
surface is completed that the finish is at the surrounding ground level, particularly
paying attention to any hard standing around the controller base.

7.3.12 Sealing the Base

To prevent condensation and infestation in the controller cabinet the base MUST be
sealed as soon as possible after the controller has been installed. If any of the
cables were replaced or moved during the installation of the controller the kiln dried
sand in-filling must be made good before the sealing compound is introduced.
The in-filling, kiln dried sand, must be brought to ground level or above
and compacted. Make sure that the kiln dried sand is level or slightly
sloped down where it meets the cables so it will not prevent the sealant
meeting the cable.
The sealant should be poured all around the cables and to a height which, when the
sealant is set, gives a total covering not less than 6.5mm thick over the base of the
controller cabinet base. Use between 2.0 to 3.0 litres of approved epoxy resin for
the large controller cabinet base and 2.0 Litres for the small controller cabinet base
this will give an adequate and even cover.
This will act as a preventative barrier against the ingress of moisture and
animal/insect infestation.
A concrete fillet around the outside of the stool may be completed before or after
the epoxy sealing to suit site conditions.
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ST950 ICM Handbook
Mobility, Intelligent Traffic Systems
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to the top surface of the stool
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Mobility is a division of Siemens Plc
96 of 154
Issued
January 2020
667/HE/45950/000