6
Design
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Bosch Security Systems
Seismic Detectors Application Guide
I-200153-1
04.2016
Figure 6-11 shows a vault that is constructed using the interlocking panel construction method.
For signal detection purposes, the interconnection between the joints including the use of insulat-
ing/securing materials will determine the efficiency of the acoustic transfer. The width of the panels
that are used will also have a direct bearing on the quantity of detectors that are required for ade-
quate coverage of the protected area.
The expanded section of Figure 6-11 shows a plan view of the joints.
As construction methods of vaults may vary, the transfer of detection radius from one
surface to an adjacent surface should not form part of any calculation.
6.2.2
Panels with steel surrounds
Figure 6-12: Modular vault - panels with steel surrounds
Figure 6-12: Modular vault - panels with steel surrounds shows a vault that is constructed using
concrete panels with steel surrounds. The steel surrounds may be bolted or welded together to
form the wall.
For signal detection purposes, the interconnection between the steel surrounds will determine the
efficiency of the acoustic transfer.The frequency, size and quality of the joining bolts or welds will
determine the transfer capabilities of the wall. There may be a vast difference in how the panels are
connected together and this will have a direct bearing on the capability of the structure to transfer
the signals that the seismic detectors detect.
In addition to being bolted together, all joints bet
ween modules must be welded every 400 − 500
mm with a 30 − 40 mm seam.
Corner joints between wall modules must be seamlessly welded.
When building vaults using modules of varying thickness, the butt joints must be seamlessly
welded.
Always equip modules which have a pay-in/withdrawal slot with a detector; this will also be able to
monitor the adjacent modules.
As construction methods of vaults may vary, the transfer of detection radius from one
surface to an adjacent surface should not form part of any calculation.
