P the mat length is then used to calculate bending which typically controls the mats design and shear stresses.
Effective bearing length of crane mats pdf.
Cleaning phytosanitary elements 19.
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.
Mat size mat size deducted from point load in 3 in kns soil type value 2 73500 x 9 81 721 035 kns.
Mat area is calculated by dividing the crane load plus the lc crane mat weight of the mat by the allowable ground bearing pressure.
Mar 28 2020 ebook david duerr effective bearing length of crane mats by j.
12m boom length.
Engineering independent testing of rig mat core 11 12.
This paper is used as a reference in keith anderson s book rigging engineering basics in the chapter on load spreading for mobile cranes.
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.
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.
Engineering analysis of crosslam clt crane mats 16 17.
Crane mat weight distribution 14.
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.
Crosslam clt crane mat properties 13.
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.
Divide this area by the width of the mat and we have the required effective bearing length.
Assumed effective length 15 64 ft t l track bearing length 31 49 ft soil bearing method mat strength method ground bearing pressure.
Quality assurance 18.
C bearing width of track 5 90 ft p load applied to one mat 207 087 lbs p crane load applied to one mat 207 087 lbs 90 36 of allowable capacity t tl track toe load 8 784 lbs ft a reqd.
P divide this area by the width of the mat to develop the required effective bearing length.
