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PROJECT: <br />Squaw Gulch VLF <br />FEATURE: <br />Riser Pipe Design <br />DETAILS: <br />Pipe Axial Load <br />Pipe Self Weight: <br />From the Roscoe -Moss Table: <br />24" O.D. x 23 1/4" I.D. pipe = 94.62 lbs/ft <br />Total Weight = 120 ft * 94.62 lbs /ft = 11,354 lbs <br />Shear Traction: 604,731 lbs <br />F = 604,731 lbs + 11,354 lbs = 616,085 lbs <br />616,085 lbs < 982,800 lbs <br />Unlined: <br />Average Stress = 1/2 * [110 ft * 121] * 0.43 = 2,861.7 psf <br />z = 2,861.7 psf * tan(17 °) = 874.9 psf <br />Shear Force = 874.9 psf * 691.2 ft = 604,731 lbs <br />F05 Buckling: <br />604,731 lbs + 11,354 lbs = 616,085 lbs <br />982,800 lbs / 616,085 lbs = 1.6 without compression joints <br />JOB NO: <br />1125G <br />BY: <br />OV <br />CHKD BY: <br />DTW <br />Axial thrust = shear traction (ore settlement) + pipe self weight <br />Area = O.D. - I.D. = n * (2/2) - rz * (1.937/2f = 0.195 ft <br />Yield Strength = 35,000 psi (Typical for mild steel) <br />Yield Load = 35,000 lb /in * 144 in /ft * 0.195ft = 982,800 lbs <br />SHEETJ__OF. <br />DATE: <br />08/03/2010 <br />DATE: <br />08/03/2010 <br />