Figure 72. Vehicle Detectors and Loop Layout for Openings Less than 28 feet*
B
ENTER
EXIT
OUTSIDE
OBSTRUCTION
LOOP
A
ACCESS CONTROL DEVICE
(Card reader, etc.)
Vehicle Detectors and Loop Layout for Openings less than 28 feet*
PUBLIC SIDE
This layout illustrates a
bi-direconal traffic system with
controlled access entry (card
reader, radio control, etc.) and a
free exit loop. The gate is closed
by a TIMER TO CLOSE. The mer
to close starts when all loops are
clear. The mer is adjustable
from 1 to 99 seconds.
For an exit only system,
the FREE EXIT loop is replaced by
an INSIDE OBSTRUCTION loop.
the FREE EXIT loop is replaced by
an INSIDE OBSTRUCTION loop.
SECURE SIDE
C
D
E
F
CENTER
LOOP
FREE EXIT
or
INSIDE
OBSTRUCTION
LOOP
* NOTE: A minimum of three (3) detectors are required for this type of gate.
DIMENSIONS
A
= 6 to 20 feet (2 to 6 meters)
B
= 6 to 8 (2m to 243cm)
C
= Maintain 4 (122cm) minimum
D
= Maintain 5 (152cm) between loop
and edge of roadway. No vehicle can pass
through such a small area and escape detecon.
E
= Maximum 4 (122cm). Vehicle must be
able to pass from one loop to the next
without loss of detecon.
F
= The distance from gate to FREE EXIT
LOOP is equal to the gate panel length
plus 4 (122cm).
REFERENCE
SwingSmart DC Programming and Operations
MX3640-01 Rev. E ©2020
108
