Preparation of trenches
OmniTrax Product Guide Page 113
Tape sealants must be inserted manually, and the depth of installation must be carefully
controlled. As a precaution, order 5% extra tape sealant.
1. Apply sealant as per the manufacturer’s instructions. Fill the slot to 3 mm (1/8 in.) below the
pavement surface. If using chemical sealants, you can slide a striker plate along the slot to
mold the sealant to the required depth and provide a smooth finished surface.
2. Apply sealant to cracks and joints for at least 30 cm (12 in.) on either side of the slot. Remove
excess chemical sealant from the pavement surface.
3. If desired, treat the surface along the cable path with Senstar approved waterproofing sealer.
Follow the manufacturer’s instructions.
Above ground berm installation
There are three methods for above ground berm installations:
• Enclose both sensor cables in a wide, sloped sand bedding, which is wrapped in geotextile
fabric and then covered with clear crushed stone.
• Enclose both sensor cables in a narrow, rounded sand bedding, which is wrapped in geotextile
fabric and then covered with clear crushed stone.
• Enclosing each sensor cable in a narrow, rounded sand bedding, which is wrapped in
geotextile fabric and then covered with clear crushed stone.
Figure 77: Sealing the slot
Note The slots must be clean and dry BEFORE the sealant is applied.
Note Ensure that there is at least 1.5 cm (0.6 in.) of space between the top of
the backer rod and the top of the slot, for the sealant.
Note Ensure the backer rod is continuous to avoid any contact between
chemical sealants and the cable.
CAUTION Do not use a petroleum based waterproofing compound, as it can
penetrate the cable and affect operation.
min. 1.5 cm clearance
between backer rods and
top of slot
OC2 = 14 mm
(9/16 in.)
SC1/SC2 = 1 cm
(3/8 in.)
1.5 cm
(5/8 in.)
6 cm
(2.25 in.)
sealant
foam
backer
rod
OC2 cable
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