7
GATE QUALIFICATIONS/APPLICATIONS
The Sentry gate opener is designed and rated for vehicular class I, II, III or IV swing gates up to 20
feet in length. Maximum gate load not to exceed 400 pounds and 20 feet in length.
The Sentry Gate Opener is recommended for Gates that meet the following descriptions:
The Sentry gate opener is designed and supplied with universal mounting brackets to fit most types
of gate installations. Hinge post from 2 3/8” to 6” round or square can be used with the included
universal mounting hardware.
Chain Link Gate
16 feet max length
Max weight 350 lbs.
Farm Gate
20 feet max length
Max weight 300 lbs.
Ornamental Iron
12 feet max length
Max weight 400 lbs.
PROPER GATE DESIGN
IMPORTANT-
A GATE OPENER CANNOT OVERCOME A POORLY DESIGNED GATE.
Since the gate is a major component of the system, great care and concern must be given to
the gate design.
USAutomatic, LTD is not responsible for any damage to a gate in which the gate
opener is installed. A poorly installed or misadjusted gate could be damaged. It is the responsibility
of the installer to verify proper gate installation prior to opener installation.
As a general rule, a gate,
which is to be automatically operated, must be stronger and smoother than one operated manually.
• Does the gate swing smoothly without binds or excessive resistance?
• Swing gates should swing level and plumb to prevent the opener from having
to lift the gate open or closed.
• Swing gates should not require a wheel to support them. Wheels create drag,
which will cause opener problems. A wheel is generally a sign of a weak hinge
system or a weak gate frame.
• Is the gate frame of substantial strength without excessive weight?
• Will the frame withstand normal wind load conditions without sway or vibration?
• Will the gate close correctly without being hand-guided or lifted to close?
• Are the hinges suited for an automatic gate opener? We recommend bearing
type hinges to reduce friction drag.
• Will a reinforcement brace be required to attach the linear actuator to the gate
or does a suitable cross member exist in the gate design?
If any of these problems exist, they must be corrected to achieve a reliable automatic gate system.
