Glossary


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1) Single deep selective rack

Rack structure which allows loads to be stored one unit deep on either side of an aisle.

2) Stock-to-operator equipment

A device which brings items from their storage locations to the end of an aisle where an operator or transport mechanism sends them to their point of use.

3) Narrow aisle truck

A truck which permits right angle stacking in aisles narrower than those normally required by counterbalanced trucks.

4) Aisle

The space between storage aids used by material handling equipment and/or personnel.

5) Stacker crane

The stacker crane in appearance looks like a conventional bridge crane except that in place of a hoist, a rotating ridged or telescoping mast is suspended from the bridge trolley with the mast equipped with a load handling device such as single or double forks or a grab. These cranes can be manually operated or powered and are used where the carne spans multiple aisles allowing for the storage and retrieval within any aisle of items such as coils of steel.

6) 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.

7) Side loader truck

An industrial truck with lifting capabilities and able to accommodate the narrowest of aisles, depending upon the model and type, all the way down to the 5 foot range. Trucks operating in this range are sometimes called very narrow aisle (VNA) trucks. With the exception of the platform type sideloader, the fork and/or the entire mast on a VNA style truck is capable of rotating or swiveling 90 degrees left or right within the aisle from the down aisle orientation. Some manufacturers have models that can stack in storage racks 10-12 pallets high.

8) Straddle truck

An industrial lift truck that is utilized in aisles as narrow as 6 feet and has had the counterbalancing addressed by front end outriggers. These outriggers also serve to prevent the natural forward tipping motion that would be created as a load is lifted

9) Push back rack

Utilizing wheels in the rack structure, this rack system allows palletized goods and materials to be stored by being pushed up a gently graded ramp.  Stored materials are allowed to flow down the ramp to the aisle.  This rack configuration allows for deep storage a each rack level.

10) Selective rack

Steel storage racks arranged in either single or back-to-back (double) rows.  Each of the rows offers a bay or number of bays in the down aisle direction.  Pallets are generally positioned side-by-side in the down-aisle direction at each level of the bay.  The advantage to this configuration of rack is that all pallets are accessible from the facing aisle.

11) Automatic Storage & Retrieval Systems

AS/RS is becoming a generic term that today refers to a variety of means under computer control for automatically depositing and retrieving loads from defined storage locations. See also  Carousels . Although both of these technologies have roots that go back some 40 to 50 years, it is only since the late 1990s that AS/RS has been used to refer to more than crane and aisle applications.

12) 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 .

13) Shelving service aisle

The area in front of a unit or row of units required to service (pick or place stock into or out of the shelving unit.

14) Single row single face shelving

One generally continuous row of units joined together and side to side to be serviced from one service aisle.

15) Single row double face shelving

One generally continuous row of units joined together side to side to be serviced from either front or back by two service aisles.  May also be identified as "pass through" shelving.