Crane Bearing Mats

Crane weight and attachments plus load weight and rigging obtain the ground bearing capacity gbc permitted for the soil you are set up on.

Crane bearing mats.

Determine area by calculating force pressure. Academia edu is a platform for academics to share research papers. Heavy lifting mammoet offers state of the art equipment technical expertise and longstanding experience to carry out heavy lifting work safely and efficiently. Responsibility as with all activities on construction sites the effective management of the safety of lifting.

This paper is used as a reference in keith anderson s book rigging engineering basics in the chapter on load spreading for mobile cranes. Once the allowable ground bearing pressure and maximum outrigger reaction force is known you re in the best position to select the right size outrigger pad or crane pads. Outrigger pads floats placed outside target area center of the pad mat will result in non uniform ground bearing pressures. This is the pressure the soil can withstand.

Crane tech teaches a 4 step process. Mat size mat size deducted from point load in 3 in kns soil type value 2 73500 x 9 81 721 035 kns. The crane outrigger float should be placed squarely in the center of an outrigger pad or crane mat. Calculate the force exerted on the ground i e.

Fibermax crane pads have standard foot placement targets to assist with proper pad float placement. When using this type of loading it is important to ensure an appropriate factor of safety is included in consideration of ground bearing capacity mat size. These loads will be significantly lower than the above worst case scenarios noted above and are produced from crane specific software produced by the crane manufacturer. Determining the load exerted by mobile crane outriggers or crawler crane tracks determining the suitability of the crane mats and bearing capacity of different types of soil.

The first product of this work was the paper effective bearing length of crane mats which was presented at the 2010 crane rigging conference in houston.