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Tagline
An electrical conductor system employing flexible cables which are festooned along the bridge or runway. The cable is attached to trolleys or hooks which operate on a rigid bar or tight wire along the entire bridge width or runway length. This arrangement serves to keep the cables "out of the way" of the crane and hoist movement.
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Target correction factor
Aspects of the target object such as sensing face size and shape that determine the actual sensing distance with respect to inductive proximity sensors.
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Target of flight
A measurement principle used in electronic distance measuring sensors based on the length of time it takes for a light pulse to travel from transmission to reception back from the target.
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Telescoping belt conveyor
A belt conveyor whose length can be varied by telscoping slides on the frame.
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Ten Principles
A principle is a general rule, fundamental, or other statement of an observed truth. Over time certain fundamental truths of material handling have been found to exist. The "principles" of material handling are often useful in analyzing, planning and managing material handling activities and systems. At the very least they form a basic foundation upon which one can begin building expertise in material handling.
These principles, that serve as a starting point to identifying potential problems and assessing need, are:
1. Planning
2. Standardization
3. Work
4. Ergonomic
5. Unit Load
6. Space Utilization
7. System
8. Automation
9. Environment
10. Life Cycle Cost
To receive a complete explanation for each of these :"Principles", contact the Material Handling Institute at (704) 676-1190 and ask for the document, "The Ten Principles of Material Handling".
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Testing
The Material Handling Industry of America is an ANSI accredited standard developing entity. The various Product Sections affiliated with MHIA have developed a number of testing and design standards for various types of material handling equipment. To peruse these standards, you are encourages to visit the Material Handling Institute's Resource Center at www.mhia.org/bs.
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Thermal transfer label
Labels printed using a direct thermal printer that does not use ribbons.
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Thermoformed pallet
Thermoforming takes place when a thick plastic sheet is clamped onto a frame and heated, then this softened, pliable sheet is forced by either pressure or vacuum to adapt to the shape of a pallet tool.
Once the sheet has formed to the configuration of the tool and it has cooled down, it is removed from the frame. The outer perimeter of the pallet is trimmed off to yield the finished part.
Twin-sheet thermoforming is a variation of this process whereby two separate sheets of plastic are heated in two separate sets of tooling and then fused together under pressure to yield a pallet with a hollow section or sections.
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Third Party Logistics
Third Party Logistics, or 3PL is a business arrangement whereby logistics services, often including warehousing, are contracted to an independent business that specializes in such services and is not connected through direct ownership to the producer or factory requiring the service. See also, Supply Chain, Supply Chain Management, Logistics and Material Handling. Note that all of referenced terms are highly interrelated and their definitions are frequently intermingled.
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Three wheel truck
As the name implies, an industrial truck utilizing three wheels so as to make it more maneuverable than trucks used for over-the-road, tractor trailer truck loading and unloading.
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Tie
Term used to describe a layer of product positioned in a unit load or on a pallet.
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Tie down
A means by which a unit load is secured to a pallet, usually by means of stretch wrapping, shrink wrapping or strapping.
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Tier
Generally refers to one layer of a unitized pallet load. Also, may refer to layers of storage which are of the same height.
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Tilter
A device which mechanically angles a container towards the worker for easier loading and unloading of parts.
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Time and Motion
A work measurement process that takes into consideration time to perform a task in a normal or variant effort or pace. The time and effort needed to accomplish a task.
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TMS
Transportation Management Systems
Transportation Management Systems optimize the use of transportation resources to manage inbound, outbound and internal shipments at the lowest cost consistent with customer service standards and trading partner requirements.
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Tong grab
A lifting attachment usually used in conjunction with a hoist or forklift that utilizes a "scissors" action to grip a load for vertical lifting or transport.
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Top running crane
An electric overhead traveling crane having the end trucks supported on rails attached to the top of the crane runways.
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Total Quality Management
The quality of a total process is managed by observing and seeking to meet customer expectations. The emphasis then becomes the prevention, detection, and elimination of defects or other quality problems.
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Tote
A container generally used for order-picking and shipping of items. Usually small in size and easily moved by hand or other lifting devices and designed to be durable and reusable.
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Tow line conveyor
A conveyor embedded in the floor which provides power to wheeled carriers moving along the floor.
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Tower crane
A crane designed to handle very large, heavy loads used at construction sites and for the loading and unloading of sea going containers.
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Track section
A piece or section of a monorail or patented track system.
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Track switch
A device with a moving section of monorail or patented track that can be moved to permit the passage of a carrier or trolley from one fixed track to another.
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Tracking software
Software programs developed specifically to enhance the "tracking" of returnable containers and pallets.
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Tractor drive
An electrically or pneumatically powered drive mechanism that attaches to a trolley or carrier, via a tow bar, and allows the trolley/carrier to move on a monorail or negotiate switches, curves and drop sections. Manually powered trolleys or carriers can be retrofitted with tractor drives, in some cases.
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Trailer restraint
Mechanical or hydraulic devices designed to prevent trailer movement away from the dock. Usually attaches from dock face to ICC bar or rear wheel or directly to the trailer in some fashion.
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Tray
Plastic or metal container utilized to house or carry small parts and items. Often use in conjunction with carts or shelving for this movement or storage. See also Cart.
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Tray sorter
A high speed type of sorting conveyor with sorts in the 250 cases per minute range, this type consists of a continuously moving train of independent trays that move in a straight line and recirculate in either a horizontal or vertical (over and under) closed loop. At the proper moment, controls cause the tray to tilt to either side, thereby discharging the load to the desired take away lane.
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Trolley conveyor
A series of trolleys with loads suspended from them, supported by an overhead track and connected by endless propelling medium such as chain or cable.
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Trolley hoist
A hoist suspended from a trolley. A hoist can be connected to a trolley by hook or clevis, or a hoist can be integral with the trolley.
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Truss girder crane
An overhead traveling crane designed with structurally reinforced bridge girders to allow greater span and loading capabilities. The reinforcement consists of utilization of trusses extended vertically and horizontally from the load bearing beam(s) of the crane bridge.
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Tugger
Also known as "tractors". Used solely to pull a string of unit load trailers and have no lifting capability. These can be operator driven or automatic/guided path. See also Tugger AGV.
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Tugger AGV
A tugger AGV is a powered, wheel based transport vehicle that is capable of pulling one or more non powered vehicles (with loads) behind it in a train. AGVs operate under computer control without the need for human operators or drivers. See also AGVS.
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Turntable
A round flat surface which rotates about its center to allow an operator to easily access all parts of the surface.
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Two level shelving
Two levels tiered one on top of each other with each tier serviced from a separate level.
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Two-way pallet
A pallet constructed with stringers that do not have notches, so that fork tines can be inserted only from the two open ends.
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Type I pallet
Single-faced, non-reversible pallet.
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Type II pallet
Double-faced, flush-stringer or block, non-reversible pallet.
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Type III pallet
Double-faced, flush-stringer or block, reversible pallet.
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Type IV pallet
Double-faced, single-wing, non-reversible pallet.
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Type V pallet
Single-faced, single-wing, non-reversible pallet.
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Type VI pallet
Double-faced, double-wing, reversible pallet.
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