ORACLE SERIES 2E, 2EC, 4E, 4EC, 4H
Operations Manual
Eberle Design Inc.
Page 21
termination. Leave the lead-in wire out of the slot so that it may be twisted together before
being laid in the slot. Lead-ins should be twisted with a minimum of 4 to 6 twists per foot to
prevent any separation of the lead-in wires.
Make sure that the loop wire is pushed fully to the bottom of the saw slot. Small pieces of
foam rubber (backer rod) or similar material may be used at various points around the
circumference to prevent the loop wire from rising up while the sealant is poured and
curing.
Many different types of loop sealant are now available. Single part types are the easiest to
apply since no mixing is required, but they also tend to be more expensive in terms of linear
feet of saw slot filled. When applying the sealant, make sure that it is able to sink to the
bottom of the slot and completely encase the loop wire. The wire should not be able to
move when the sealant has set. Ensure that there is enough sealant to completely fill the
slot; if possible the sealant should protrude slightly above the surface of the pavement so
that small rocks or other debris cannot collect in the slot.
The sealant manufacturer instructions concerning setting time should be noted especially
when determining the length of time to wait before allowing vehicles to cross the loop area.
Consult the Eberle Design web site at
for further application information
regarding loop design.