What is an Underhung Crane?

Underhung cranes—sometimes referred to as under-running cranes—do not require supportive floor columns. This is because they typically ride on the lower flange of a runway beam suspended from the facility roof or rafters. By optimizing end approaches, underhung overhead cranes make the most of facility space.

What is the difference between a bridge crane and gantry crane?

Bridge cranes provide a lifting mechanism on an elevated rail for applications that require all processes off the floor. … Meanwhile, gantry cranes provide overhead lifting from a structure with legs and casters on the floor, either running in a track or trackless.

What is the purpose of overhead crane?

To move extremely heavy or bulky loads through the overhead space in a facility, instead of through aisles or on the floor, an overhead crane (also called an industrial crane, crane, or overhead traveling crane is a machine that lifts, lowers and moves a load horizontally.

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What is the difference between a crane and a hoist?

A Crane is a complex device used for moving loads in various directions. … While a hoist by itself can only raise and lower objects on a vertical plane, it is the component used for that purpose as part of a crane’s wider application. Hoists, as well as cranes, are typically used in a construction or industrial setting.

What is a floor operated crane?

Floor-operated crane means a crane which is pendant or nonconductive rope controlled by an operator on the floor or an independent platform. … Overhead crane means a crane with a movable bridge carrying a movable or fixed hoisting mechanism and traveling on an overhead fixed runway structure.

How much can a gantry crane lift?

They have spans of 140 metres (460 ft) and can lift loads of up to 840 tonnes (830 long tons; 930 short tons) to a height of 70 metres (230 ft).

What are the types of cranes?

Various Types

  • Telescopic Crane. A telescopic crane offers a boom that has a number of tubes that are fitted inside each other. …
  • Mobile Cranes. …
  • Truck Mounted Crane. …
  • Tower Crane. …
  • Rough Terrain Crane. …
  • Overhead Crane. …
  • Loader Crane.

29 нояб. 2017 г.

How do you make an overhead crane?

Design Guide for Overhead Cranes

  1. A traveling base with a traveling rail on either side. …
  2. The End carriage on both sides which houses the wheel for the crane movement and also supports the top girder. …
  3. The Top Girder provides the side movement of the hoist and trolley.

29 мар. 2010 г.

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What are the three major components of a typical overhead crane system?

Category 2 and 3 Crane Components The principal parts of overhead traveling cranes are: bridge girders, end trucks, trolley with hoisting mechanism, and operator’s cab or pendant control.

What are the components of a crane?

Some of these parts and their functions include:

  • The Driving Components. In any mobile crane, one of the common components will be the driving system used to make it mobile. …
  • The Operator’s Cabin. The operator’s cabin houses all of the crane’s controls. …
  • The Boom. …
  • Hoist and Hook. …
  • Hydraulic Pump. …
  • Outriggers and Counterweights.

6 февр. 2020 г.

What is the end of a crane called?

JIB CRANE – A crane design whereby the bridge girder (commonly called the boom) is fixed at one end, allowing the opposite end to cantilever. The fixed end generally is hinged to allow rotation. LIFT – Maximum safe vertical distance through which the hook, magnet, or bucket can move.

What are some examples of different types of hoists?

There are three main types of manual hoists, including:

  • Hand Chain Hoists. …
  • Lever Hoists or Ratchet Hoists. …
  • Lineman’s Hoist. …
  • Electric Chain Hoists. …
  • Electric Wire Rope Hoists. …
  • Air Chain Hoists. …
  • Air Wire Rope Hoists. …
  • Hook-Mounted Hoist Suspension Systems.

1 нояб. 2017 г.

What is the jib of a crane?

What is a Jib Crane? It is a crane with a horizontal member, commonly known as the jib or boom. A jib is an operating arm that extends horizontally from the crane. The role of the jib is to support a movable hoist fixed to either a wall or pillar mounted on the floor.

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What is creep speed?

CREEP SPEED: A very slow, constant, continuous, fixed rate of motion of the hoist, trolley, or bridge: usually established at 1% to 10% of the normal full load speed.

How often is crane training required?

So if there is no federal OSHA standard, then what do we recommend? Crane Tech endorses refresher training every two years, even if everything seems fine.

Does OSHA require daily crane inspections?

OSHA requires that all active cranes must be inspected once a year at the minimum. … Inspections that should be conducted daily or monthly are classified as frequent inspections. All other inspections are considered periodic inspections, which can occur bimonthly, quarterly, or yearly.

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