Mobile Crane Loads To The Supporting Surface

A mobile crane is a more flexible and more versatile type of crane than the fixed crane and it brings lots of benefits to any job site. One common benefit is that it can be very quickly and easily set up, and dismantle as well, making it extremely practical and efficient for any lifting operation. On wheels or on track, the mobile crane can access any job site and operate in the tightest areas on job sites. There are many mobile crane types, such as rough terrain, all terrain, truck-mounted, crawler, pick & carry, side-lift cranes and many others. However, most mobile crane types are composed of chains, a control panel and a wire rope drum.

To determine the mobile crane support reactions there are reliable information which are not always available. One common information is the rough conservative approximation, a norm in many cases. Today, the mobile crane manufacturers use proper resources to provide such information through a software that can give the mobile crane operators precise and comprehensive answers. To calculate support reactions from a basic mobile crane, manufacturers use various methods. Although the tools by the manufacturers usually make the calculations completely unnecessary, those methods are still useful for some exceptions and for mobile crane operators that ask for more info for the level of comprehension.

The principle of performing calculations is usually not included in the manufacturer's manual of the mobile crane, so it needs to be calculated by using other means. To make a calculation to the supporting surface of a mobile crane, there are some needed information. Those information are:

• Boom: The length, weight and CC location coordinate of each boom (it applies for both latticed and telescopic booms), including the effects of mast, upper spreader and guy wires.
• Jib: The length, weight and CC location coordinates of each jib, including the effects of jib mast and guy wires.
• Superstructure: The CG horizontal distance from the axis of rotation and the weight of the superstructure (including the counterweights).
• Carrier: The weight and CC horizontal distance from the axis of rotation of the carrier.