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The actual bearing length is shown as 15 1 markedly greater than the effective bearing length of 9 5 calculated using this design methodfor the failure analysis we can use the program fadbemlp a nonlinear analysis program that is packaged with the bowles 1996 text. 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 this paper is used as a reference in keith andersons book rigging engineering basics in the chapter on load spreading for mobile cranes. Engineering independent testing of rig mat core 11 12 crosslamr clt crane mat properties 13 crane mat weight distribution 14 crane mat shipping sizes available 15 engineering analysis of crosslamr clt crane mats 16 17 quality assurance 18 cleaning phytosanitary elements 19. P the mat length is then used to calculate bending which typically controls the mats design and shear stresses in the mat based on the assumption of a uniform pressure equal to the crane load divided by the bearing area acting upward on the bottom of the mat p using a traditional wood mat design as a guide we utilize published allowable . Track bearing length 3700 ft soil bearing method mat strength method ground bearing pressure c bearing width of track 590 ft p load applied to one mat 188635 lbs p crane load applied to one mat 188635 lbs 7916 of allowable capacity t