| Bridge Crane | - | Bridge Crane is the entire assembly as a functioning unit of end trucks, beam, trolley, hoist, electrification, control panel, end stops, bumpers, drives, gear boxes and festooning. |
| Bridge Crane Span | - | Bridge crane span is the distance from center of rail on one runway to center of rail on other runway side. For under running cranes, this dimension if measured from the runway beam centers as apposed to rail centers. |
| Deflection | - | Deflection is the relative vertical displacement of a member or part. For bridge cranes that value is considered for total load conditions (I.e. lifted load + trolley weight + bridge dead load). |
| Duty Class | - | Duty Class is a method of distinguishing the usage of a crane, from a load and/or cycle point of view. See Crane Classifications reference document in our literature section. |
| End Trucks | - | End Trucks are the structural/mechanical units that the main bridge girder is supported by.
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| Equivalent Durability Wheel Load | - | Equivalent durability wheel load is used to express the wheel loads that account for duty rating and wheel RPM. This value is generally less the service wheel load.
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| Festoon pendant (ie. festooning) | - | It is a free floating pendent cable that allows users the freedom to move independently from a product being lifted.
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| Gantry Crane | - | A gantry crane looks like an overhead bridge crane, except it's not part of the structure of a building. Instead, a gantry consists of two uprights run on a track at the floor level; in a lighter duty crane, the uprights are on wheels and can be manually repositioned around a facility. Gantry cranes are most commonly used in maintenance operations. They are a cost-effective solution for applications that require infrequent duty. |
| Hook Approach | - | Hook Approach is defined as the closest position horizontally that a hoist hook may be to the runway centerline.
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| Horizontal Deflection Criteria | - | Horizontal Deflection Criteria is a maximum permissible deflection ratio allowed for a bridge crane or runway. Mentor designs for a maximum lateral deflection for runways and cranes of L/400.
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| Interlock Switch | - | Interlock switches engage the bridge to the monorail spur. Transfer loads from a bridge crane to monorail spurs or storage rails and vice-a-versa. |
| Jib Cranes | - | Jib cranes are a type of crane that allows for rotational movement along with horizontal trolley motion and vertical hoisting motion. Jibs are normally mounted to a column or are free standing.
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| Monorail | - | A Monorail is an overhead fixed horizontal beam or enclosed track. A trolley and lifting device are able to move along the length of the monorail. Some monorails can have curves and switches. |
| Rated Capacity | - | Rated Capacity is the maximum allowable load that can be safely lifted by a device without exceeding any design safety factors or fatigue limits. |
| Telescoping Bridges | - | Used on work station cranes, telescoping bridges extend outside the normal reac of a bridge crane. They can be used to access a machine opening, link to an adjacent work station, and access an area beyond a column or under mezzanines or shelving. |
| Top Running or Top Runner | - | Top Running cranes run on crane rails mounted on runway beams. ELS supplies these cranes up 60 Ton capacities and 100 Ft Spans. |
| Tractor Drive | - | A tractor drive provides motorized movement on new or existing enclosed track work station cranes and monorails. The drives are designed for indoor use. |
| Under Running or Under Runner | - | Under Running cranes run on the lower flanges of runway beams. Local flange stresses due to runway wheel loads is considered by ELS when designing runways beams. ELS supplies these cranes up to 20 Ton capacities and 60 Ft. spans.
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| Vertical Deflection Criteria | - | Vertical Deflection Criteria is a maximum permissible deflection ratio allowed for a lifting device. For bridge cranes this value is L/600 and for jibs this value is R/300, where L is the span of a bridge crane and R is the reach of a jib crane |
| Wheel Load | - | Wheel load is defined as the service load for which the end truck wheels will experience when lifting the rated load.
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| Work Station Crane | - | Unlike large overhead cranes, work station cranes are free-standing or ceiling mounted. They handle product in a relatively limited area. With ceiling mounted work station systems, supporting steel does not interfere with the handling operation. Ceiling mounted systems require a building with an adequate overhead structure to hang the crane. |
