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Installation and Operations Manual — Model 400 Series
1.1.1 Gate Leaf
The gate leaf (often just called the gate) consists of three parts: the pickets, the skirt, and the
beam. The pickets are typically 1" square steel tubes spaced on 2.5" centers. The skirt is steel
plate unless configured differently by customer. The pickets and skirt are usually assembled
so that they are anti-climb, meaning there are no protrusions to serve as toeholds on the
vehicle-approach side of the gate leaf. The standard gate height is 108 inches (9 feet or 2.75
meters) above grade. The standard opening when the gate leaf is fully retracted is 144 inches
(12 feet or 3.66 meters). This is the space through which a vehicle will pass, and corresponds
to the standard width of a traffic lane.
Figure 1-1: Basic Components of a 400 Series Gate
Receiver
Stanchion
* This figure is for illustration only. It shows the back (non-impact) side of an unpainted 400
series vehicle barrier undergoing testing. An as-shipped unit would be fully painted and
would have other finish features not shown here.
The beam part of the gate leaf is a massive steel I-beam. It provides the heavy-duty structure
that stops the impacting vehicle. The stopping power is not from the beam alone, but from
the manner in which the stanchions' heavy steel tubes transfer the vehicle's energy from the
beam to the foundation.
B&B ARMR
A Division of B&B Roadway and Security Solutions
Gate Leaf
-
Pickets
- Beam
- Skirt
Motor
Stanchion
TROUBLESHOOTING
*
04X0 Rev G
8
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