Glossary


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16) Dock face

The outside wall of the dock door area.

17) Dock leveler

A manually, hydraulically, or electrically operated plate, located at the dock entrance, that can be raised and lowered to accommodate varying trailer floor heights.

18) Dock lift

A lift whose travel is generally 5 feet (1524 mm) or less and which is primarily used to load/unload material from trucks and transfer it to dock or ground elevation.

19) Dock plate

A moveable metal ramp that allows access to a rail car or trailer.

20) Dock seal

A rubber or canvas covering that extends out from a dock face to seal the gap between the dock and the trailer's entrance.

21) Dock shelter

A cover that protects the space between the door of a rail car or truck and a warehouse from inclement weather.

22) Double deck pallet

A pallet constructed of both a top and bottom deck or deckboards.

23) 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.

24) Double girder crane

An overhead traveling bridge crane that utilizes two bridge beams set atop the runway (end) trucks.  Generally this type of crane utilizes a top running trolley hoist which moves along the top of the two bridge beams on its own set of trucks/trolley wheels.  The hook from the hoist "falls" between the two bridge beams.  Headroom under the crane is increased by utilizing this hoist/crane configuration.

25) Double leg gantry

An overhead traveling crane designed so that the bridge carrying the trolley or trolleys is rigidly supported on two or more legs moving on fixed rails embedded in the floor (via end trucks attached to the bottom of each leg) or on wheels.

26) Double row, double face shelving

One generally continuous row of units joined together, back to back and side to side to be serviced from two service aisles.

27) Double wing pallet

A pallet constructed in such a way as to have the top deck extending out from opposite sides.

28) Drawer storage

Storage utilizing drawers in cabinets or within shelving systems and are suitable for applications where volume of inventory turnover is low and where smaller items are being stored.

29) Drayage

Transportation of materials and freight on a local basis, but intermodal freight carriage may also be referred to as drayage.

30) 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.