Applicable Code: Applicable code simply refers to the code, enforced by the local government, for which a given structure is designed to comply. While this isn’t used exclusively with pallet rack systems, it will come into play frequently in the design process.
Beam: In pallet rack terminology, “beam” is a fundamental word. It refers to a horizontally-oriented pallet rack component upon which the load of the pallet rack directly rests. Beams are also commonly referred to as “cross beams.”
Beam Locking Device: A beam locking device is used to prevent pallet rack beams from becoming disengaged from the upright frame. Also known as safety clips, beam locking devices most often come in the form of a pin, clip or bolt.
Buckling Strength: The concept of buckling strength is fairly straightforward. Buckling strength is easiest described as the upper threshold of weight that pallet rack can hold before susceptible to buckling or collapse.
Case Flow Rack: Also known as carton flow rack, case flow rack is a rack system in which the horizontal components are organized in a way that allows cases to be loaded onto one end of the system and picked from the other end. These rack systems are gravity-driven, first-in, first-out systems. They’re frequently used in warehouses and distribution centers with a high volume and fast turnover of product.
Connection: When used within the context of pallet rack, “connection” refers to any point at which two components of the pallet rack are joined together. A common usage is “beam-to-frame connection.”
Drive-In Rack: “Drive-in-rack” refers to a first-in, last-out pallet rack system in which pallets are loaded into the system by maneuvering a lift truck into a bay of the rack system and placing the load at the furthest back position, thus giving “drive-in rack” its name. Instead of cross beams, drive-in rack has support rails mounted to the upright frames. These rails are able to hold pallets without interfering with the path of the lift truck.
Flexural Buckling: In laymen’s terms, flexural buckling refers to a situation in which a compressed component of the pallet rack structure bends laterally, without any other type of movement. An example of a flexural buckling scenario would be a pallet rack upright that has insufficient strength to match the weight of its load, and subsequently buckles like a piece of uncooked spaghetti.
Flexural-Torsional Bucking: Flexural-torsional buckling is flexural buckling with the addition of a twisting motion of the affected pallet rack member.