Glossary


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1) Flow rack

Storage rack that utilizes shelves (metal) that are equipped with rollers or wheels.  Such an arrangement allows product and materials to "flow" from the back of the rack to the front and therein making the product more accessible for small-quantity order-picking.

2) Drive in rack

This type of rack utilizes upright frames, rails, and ties to allow a vehicle to enter a storage rack structure from one side only and pick up or deliver pallets on continuous rails.  Drive-in rack is used to address repetitive products and serves to take advantage of cubic space available for storage, when such unit loads do not lend themselves to block stacking.

3) Drive through rack

This rack is similar to drive-in rack except that the fork truck is capable of driving straight through the structure at any storage location along the aisle.

4) Double deep rack

A racking system that is used where a greater storage density is required. It accommodates two pallet loads stacked back-to-back and requires special fork trucks called reach trucks.

5) Decking section

A completely fabricated decking assembly with reinforcing members ready for installation upon supporting storage rack framing.  One or more decking sections are used to form a shelf surface.

6) Free span

The distance between supports in a storage rack.

7) Fixed Aisle Storage & Retrieval

Fixed Aisle (F/A) Storage & Retrieval Systems consist of one or more long, narrow aisles framed on both sides by a steel (and sometime extruded aluminum) storage rack structure into and from which loads are automatically stored and retrieved under computer control. The storage/retrieval function in each aisle can be performed a variety of ways.  However, the most  common was is by a machine that consists of a floor running, traveling structural frame or vertical mast that guides and supports a hoisting carriage on which loads are carried. One or more shuttles or insertion/extraction devices on the hosted carriage manipulates loads into and out of adjacent or opposing storage rack positions. All three machine motions; horizontal (down aisle), vertical and shuttle action are independently and automatically controlled. See also Carousels , Unit Load AS/RS , Mini-Load AS/RS and/or Micro Load AS/RS .

8) Decking

The material, generally made from welded wire, that is placed on shelves, rack load beams or walks to support loads of variable sizes. The decks or flooring of a mezzanine can be made of several different types of materials depending upon the requirements, features and capacity of the mezzanine. These flooring/decking options may include bar grating, plank grating, wood planking, plywood, composite materials and cement.