the section modulus of 3x3x3/16 tube is 1.73 inches cube the effective span length of the tube is 6 ft minus 2x1ft gusset plates = 4 ft The maximum bending moment for a 3000 lb load = 3000 x 4 divided by 4 x 12=36000 inch lbs the stress would be 36000 divided by 1.73 inches cube which equals 20,809 psi which is below 24000 psi allowable
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Today's Featured Article - Threshin Demonstration - by Michael Delaney. Introduction I bring you greetings from Prince Edward Island, Canada. We are Canada�s smallest province but big on farming. Maybe you�ve heard of us. Potatoes are our biggest crop. However, there is lots of mixed farming here also. I have a small mixed farm with 25-30 cattle. I make very good use of old machinery. I have a 135 MF Diesel, Farmall H and 1/3 share in an Allis B. I have complete lines of tillage and harvest equipment, and a saw gear etc. I have everything one would
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