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2.12 For a gate operator utilizing a contact
sensor (Edge):
a. One or more contact sensors shall be
located where the risk of entrapment or
obstruction exists, such as at the leading
edge, trailing edge, and postmounted both
inside and outside of a vehicular horizontal
slide gate.
b. A hardwired contact sensor shall be
located and its wiring arranged so that the
communication between the sensor and the
gate operator is not subjected to mechanical
damage.
c. A wireless device such as one that transmits
radio frequency (RF) signals to the gate
operator for entrapment protection functions
shall be located where the transmission of
the signals are not obstructed or impeded
by building structures, natural landscaping
or similar obstruction. A wireless device
shall function under the intended end-use
conditions.
d. One or more contact sensors shall be
located on the inside and outside leading
edge of a swing gate. Additionally, if the
bottom edge of a swing gate is greater than
152 mm (6 in) but less than 406 mm (16 in)
above the ground at any point in its arc of
travel, one or more contact sensors shall be
located on the bottom edge.
3. Use of Vehicle Detectors
Use of vehicle detectors (loop detectors) is strongly
encouraged to prevent damage to vehicles
caused by gates closing on them. This is not
considered to be a safety item as vehicle detectors
cannot provide protection to pedestrians. In some
situations, photoelectric devices may be used as
vehicle detectors, but should be wired accordingly.
8
4. Gate Construction and Safety
Gate construction plays a very important role in
ensuring the safety of any automated gate system.
The standard for gate construction is ASTM F2200.
Below are key areas to address safety in gate
design. For complete information consult the
standard. Copies of the standard are available at:
https://www.astm.org/Standards/F2200.htm
Another source of information is available
from DASMA, the Door and Access System
Manufacturer's Association. The Association
publishes Technical Data Sheets, one of which
concerns ASTM F2200. For more information, see:
http://www.dasma.com/PDF/Publications/
TechDataSheets/OperatorElectronics/TDS370.pdf
4.1 General Requirements for gate construction
4.1.1 Gates shall be constructed in accordance
with the provisions given for the appropriate
gate type listed. Refer to ASTM F2200 for
additional gate types.
4.1.2 Gates shall be designed, constructed
and installed to not fall over more than 45
degrees from the vertical plane, when a gate
is detached from the supporting hardware.
4.1.3 Gates shall have smooth bottom edges,
with vertical bottom edged protrusions not
exceeding 0.50 in. (12.7 mm) when other
than the Exceptions listed ASTM F2200.
4.1.4 The minimum height for barbed wire shall
not be less than 6 ft. (1.83 m) above grade.
The minimum height for barbed tape shall
not be less than 8 ft. (2.44 m) above grade.
4.1.5 An existing gate latch shall be disabled
when a manually operated gate is retrofitted
4.1.6 A gate latch shall not be installed on an
automatically operated gate.
4.1.7 Protrusions shall not be permitted on any
gate. Consult ASTM F2200 for exceptions.
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