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.
Effective bearing length of crane mats pdf.
Mar 28 2020 ebook david duerr effective bearing length of crane mats by j.
Effective bearing length of crane mats.
Crosslam clt crane mat properties 13.
Rowling beginning in 2009 david duerr pe ret conducted a detailed study of the strength and behavior of crane mats the goal of this work was an improved understanding of the strength of mats particularly timber.
Crane mat weight distribution 14.
The effective bearing length is the section of the mat that is in contact with the ground and contributing support to the equipment loaded onto the mat.
P divide this area by the width of the mat to develop the required effective bearing length.
Engineering independent testing of rig mat core 11 12.
Engineering analysis of crosslam clt crane mats 16 17.
P the mat length is then used to calculate bending which typically controls the mats design and shear stresses.
12m boom length.
Divide this area by the width of the mat and we have the required effective bearing length.
Mat area is calculated by dividing the crane load plus the lc crane mat weight of the mat by the allowable ground bearing pressure.
Crane mat shipping sizes available 15.
Free effective bearing length of crane mats document media publishing ebook epub kindle pdf view id e527ff490 mar 27 2020 by seiichi morimura configuration radius 12m boom length 324m crane can lift 45 tons crane utilisation load 4t x 100 45.
This method determines the effective bearing length allowable bending based on the strength in the mat allowable shear strengthin the mat allowable bearing pressure of the soil and.
32 4m crane can lift 4 5 tons crane utilisation load 4t x 100 4 5 88 8 crane utilization too high for hazardous area chemical plant you would need to reduce boom length or reduce.
P the required crane mat area is calculated by dividing the crane load plus the weight of the mat by the allowable ground bearing pressure.
Cleaning phytosanitary elements 19.
This paper is used as a reference in keith anderson s book rigging engineering basics in the chapter on load spreading for mobile cranes.
Assumed effective length 15 64 ft t l track bearing length 31 49 ft soil bearing method mat strength method ground bearing pressure.
