Overhead Cranes For Sale | IronPlanet (2024)

FAQs

What are the three basic types of overhead cranes? ›

The single girder type overhead crane is the most common overhead crane. It is generally used for light applications, normally up to 10 tonnes. The double girder overhead crane structure is used for heavier applications up to 125 tons and reaching over 100 feet of span.

The rated load of the crane shall be plainly marked on each side of the crane, and if the crane has more than one hoisting unit, each hoist shall have its rated load marked on it or its load block and this marking shall be clearly legible from the ground or floor. Clearance from obstruction.

The Jib Crane:

Jib cranes may be appropriate for servicing machinery located outside of the coverage of an overhead crane, or for assembly lines where jib boom areas can overlap for staged operations. Jib cranes may be floor mounted or supported by the building frame. Floor mounted jib cranes are generally preferred.

Main Differences Between Overhead Cranes and Hoists

Hoists can only move loads up and down, while cranes can move loads up and down and side to side. In the latter, a hoist serves as the component that provides vertical movement, while a trolley and bridge serve as the components that enable horizontal movement.

Overhead Crane Longevity

Based on its construction and anticipated usage, the Crane Manufacturers' Association of America (CMAA) rates cranes from A (very light duty) to E (extreme duty). As a result, most US cranes have a lifespan of 20-30 years with proper use and maintenance.

Standing five feet tall with a wingspan of more than seven feet, the Whooping Crane is North America's tallest bird. It is also the rarest crane in the world. The species was once found across the entire continent, but in the 1940s fewer than 20 individuals survived.

How to calculate load of overhead crane? ›

Determining the crane load capacity ensures a safe work environment and allows the project to proceed smoothly. You may need to find the Crane Capacity index for the load chart. To calculate the crane capacity index, use this formula: (Average (radius x max (lifting height x capacity))) / 100.

Double girder hoist overhead cranes are heavy-duty lifting equipment used in a variety of industrial applications, generally capacity from 5t to 80 tons.

OSHA requires that all active cranes must be inspected once a year at the minimum. However, depending on the crane's usage, additional inspections will be required.

PPE is essential for protecting overhead crane operators and workers in the surrounding area from hazards such as falling objects and electrical shock. OSHA requires that employers provide appropriate PPE, including hard hats, gloves, eye protection, and electrical hazard protection.

All crane operators, riggers and employees who work in the area where overhead cranes are in operation must wear the appropriate PPE, such as hard hats, safety glasses, work gloves and hard-toe boots.

Working level: The working condition index of the whole machine indicating the full load degree of the crane lifting load and the number of lifting work. The working level of the crane is divided into 8 levels, A1-A8, light (A1-A3) and intermediate. (A4, A5), heavy grade (A6, A7), extra heavy grade (A8).

An overhead crane typically comprises three major components: the bridge, the hoist, and the runway. The bridge spans the area over which materials need to be moved and can be single or double girder based on weight requirements and the length of the workspace required.

Overhead cranes are an effective way to lift, move, and transport goods and materials. Many sectors, such as construction, manufacturing, and the metal industries, use them to complete their daily operations. There are many safety concerns when loading, unloading, and moving heavy materials.