Glossary


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16) 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.

17) 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.

18) 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

19) Hoist Manufacturers Institute (HMI) Industry Group

The Hoist Manufacturers Institute (HMI) members are the Industry’s leading suppliers of hoisting equipment including hand chain hoists, ratchet lever hoists, trolleys, air chain hoist, air wire rope hoists, electric chain hoists, and electric wire manufacturing and distribution sector.

20) 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.

21) 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.

22) 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.

23) 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 .

24) Hybrid truck

Material handling vehicle which crosses several categories, in function, in power source, etc.

25) 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.

26) I-beam crane

An overhead traveling bridge crane that utilizes standard I-beam (S beams) as the bridge girder and at times also utilizes I beams as the runway beams.  Cranes that utilize H-beams (structural beams) as girder and runways are sometimes referred to as I-beam cranes as opposed to patented track cranes.

27) I beam track

Track sections utilizing standard shape/I-beams.

28) Identification solutions

Products such as placards, holders and nameplates that permanently or temporarily identify containers, racks, and pallets.

29) Impact deflectors

A form of conveyor sortation device that utilizes a swing out arm to divert product from a conveying surface. This device does not actually contact the conveying surface, but literally impacts the side of the load bringing about a sideways change in direction to the left or right of the forward motion.

30) Impact diverters

A form of conveyor sortation device that utilizes a mechanically actuated push plate to divert a product from the conveying surface. This device does not actually contact the conveying surface, but literally impact the side of the load bringing about a sideways change in direction to the left or right of the forward motion.