For the safety of the racking structure and the persons and machinery working in and around it, RMI’s ANSI MH16.1: Design, Testing and Utilization of Industrial Steel Storage Racks calls for the installation of beam locking devices. It states:
Except for movable-shelf racks, beams subject to machine loading shall have connection locking devices (or bolts) capable of resisting an upward force of 1,000 pounds (453.6 kilograms) per connection without failure or disengagement.
Beam locking devices such as clips and/or bolts typically come from the racking system’s manufacturer. Applying them at the time of rack installation is a safety best practice. They join the beams to the upright columns at every point of connection. Their presence prevents an upward force applied by a lift truck’s forks (or a load) from accidentally disengaging the beam in the event of an impact.
A disengaged beam cannot support the system’s rated load capacity. The main risk with a disengaged beam is that loads resting on it will fall from the rack. That increases the risk of injury to people in the aisle. Certain installations, typically those in big box and warehouse stores with a lot of general public foot traffic, often use clips and bolts together as an additional measure of safety.
During routine rack inspections, evaluate beam locking devices to confirm their proper installation. The inspection also verifies that they are still in place and undamaged. Replace damaged or missing beam connector clips or bolts immediately.
Need more details about beam-to-column connections? RMI’s ANSI MH16.1 includes more information.
