The Model DACB-PAM-400, formerly called the Active Drop Arm Swing Gate Crash Beam, Surface Mounted (DACB), is a manually operated crash beam certified at ASTM F2656-07 M30. With less than 20 pounds of lifting force needed to raise and operate the beam, this product is a perfect solution to secure high traffic areas. DACB-PAM-400 will stop both inbound and outbound vehicle impacts.