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Hand trolley
A trolley or carrier, generally suspended from a monorail or crane bridge, that is capable or designed to be propelled manually. A push-pull trolley.
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Hand truck
Refers to a type of fork truck that is powered but does not carry an operator. Often referred to as a walk behind fork truck.
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HDPE
High Density Polyethylene
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Helix
A spiral-wound wire used as a hinge or attaching device.
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High rise shelving
Units in excess of 10'3" high and serviced by rolling ladders or mechanical non-entry stock pickers. Normally tied together across the top over aisles.
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Hinged bridge
A hinged transition plate which is attached to the edge of the platform and used to bridge the gap between the platform and landing and/or truck bed.
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HMI
The Hoist Manufacturer's Institute, an affiliate of Material Handling Industry, is a trade association of manufacturers of overhead handling hoists. The products of its member companies include hand chain hoists, ratchet lever hoists, trolleys, air chain and air rope hoists, and electric chain and electric wire rope hoists.
Hoist Manufacturers Institute
8720 Red Oak Blvd., Suite 201
Charlotte, NC 28217
Phone: 704-676-1190 Fax: 704-676-1199
Hal Vandiver, Managing Director
hvandiver@mhia.org
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Hoist Manufacturers Institute
The Hoist Manufacturer's Institute, an affiliate of Material Handling Industry, is a trade association of manufacturers of overhead handling hoists. The products of its member companies include hand chain hoists, ratchet lever hoists, trolleys, air chain and air rope hoists, and electric chain and electric wire rope hoists.
Hoist Manufacturers Institute
8720 Red Oak Blvd., Suite 201
Charlotte, NC 28217
Phone: 704-676-1199 Fax: (704) 676-1199
Hal Vandiver, Managing Director
hvandiver@mhia.org
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Hoists
A suspended machinery unit that is used for lifting or lowering a freely suspended (unguided) load. May be manually operated or electrically or pneumatically driven and may use chain or wire rope as its lifting medium.
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Honeycombing
1. The practice of removing merchandise in pallet load quantities where the space is not exhausted in an orderly fashion. This results in inefficiencies due to the fact that the received merchandise may not be efficiently stored in the space which is created by the honey-combing.
2. The storing or withdrawal or supplies in a manner that results in vacant space that is not usable for storage of other items.
3. Creation of unoccupied space resulting from withdrawal of unit loads. This is one of the major hidden costs of warehousing.
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Hook rotator
A motorized device that powers the rotation of the hook attached to the bottom block of a hoist.
The hook on a bottom block generally rotates manually but due to the weight of a load and/or the need for controlled hook movement, this hook rotation is driven by a motor and gearing arrangement.
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Horizontal Carousels
As a storage device, a horizontal carousel consists of a fixed number of adjacent storage columns or bays that are mechanically linked to either an overhead or floor mounted drive mechanism to form a complete loop. Each column is divided into a fixed number of storage location or bins which in most applications are constructed of a welded wire frame. Loads consisting of containers or totes may be inserted and retrieved either manually or by an automatic inserter/extractor mechanism. However, rotation of the carousel, whereby a specific storage location is brought to the picking location, is almost always controlled automatically. See also Vertical Carousel, Vertical Lift Module, Rotary Rack, and/or AS/RS.
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Hybrid truck
Material handling vehicle which crosses several categories, in function, in power source, etc.
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Hysteresis
The ratio of the distance the object travels between the points at which the sensor is turned on and off to the distance the object is from the sensor.
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