The Upswung MB832 Manual Barrier Gate
The Upswung MB832 is a heavy-duty, hand-operated barrier gate designed for reliable performance in demanding environments. Arm lengths range from 8 to 32 feet and are constructed from heavy extruded aluminum tube. This robust specification enables spans up to 32 feet while providing excellent resistance to high wind loads in shorter configurations (see the Engineered Wind Load Graphs linked on this page for detailed ratings).
The round profile of the MB832 aluminum arm significantly reduces flagging (whipping) in high winds, minimizing the risk of metal fatigue over time. The base features thick-wall structural steel tube welded to a heavy 4-bolt steel mounting plate. The swing arm pivot assembly uses maintenance-free composite bushings with a through-bolt design. The swing arm itself is built from structural steel and includes a strong clamping system to securely hold long aluminum arms. Stainless steel Allen-socket bolts fasten the barrier arm to the steel swing arm.
Adjustable counterbalance weights allow precise tuning of the arm’s balance. Proper positioning of these weights controls both the operating speed and the natural tendency of the boom to move up or down.
Top Questions About the MB832 Manual Barrier Gate
When do you need an arm support? A Boom Tip Support or Bolt-Down Cradle is required for arms longer than 18 feet. The MB832 arm is fully self-supporting up to 18 feet.
What length arm should I order for an 18 ft+ barrier gate that requires a fixed cradle? When a fixed cradle or tip support is used, arm length is not highly critical. For applications without a tip support, measure the “dirt-to-dirt” distance (from the edge of the asphalt roadway or back of the curb) and add 1.5 feet (18 inches) to determine the total arm length to order.
How is the arm distance measured? The arm length is measured starting even with the arm-side edge of the base plate that runs parallel to and is closest to the street/roadway.
Can the barrier gate arm be locked? Yes. The arm can be securely locked in either the fully raised (up) or lowered (down) position using a simple medium-sized padlock.
