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Offset Seat Post - More Stress?
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<blockquote data-quote="wmk0002" data-source="post: 436165" data-attributes="member: 13975"><p>The applied torque from an offset is called a moment. A moment is defined as force times distance. So in your case M = 250 lbs x 3 in = 750 in lbs or 62.5 ft lbs. </p><p></p><p>If you are familiar with torquing fasteners, those torques are fairly significant. Adding something under the wood like suggested would go a long ways towards beefing it up. While I am only 170 lbs, I use a 3 " offset post on my 1648 and it is very solid. Similarly it has 3/4" plywood for decking but it also has a thin sheet of aluminum on top and a slightly thicker one underneath that came factory from Alumacraft. Those not only thicken the area up where the torque is applied which lowers the stress but the aluminum also has stronger material properties which means it can handle higher stress too.</p></blockquote><p></p>
[QUOTE="wmk0002, post: 436165, member: 13975"] The applied torque from an offset is called a moment. A moment is defined as force times distance. So in your case M = 250 lbs x 3 in = 750 in lbs or 62.5 ft lbs. If you are familiar with torquing fasteners, those torques are fairly significant. Adding something under the wood like suggested would go a long ways towards beefing it up. While I am only 170 lbs, I use a 3 " offset post on my 1648 and it is very solid. Similarly it has 3/4" plywood for decking but it also has a thin sheet of aluminum on top and a slightly thicker one underneath that came factory from Alumacraft. Those not only thicken the area up where the torque is applied which lowers the stress but the aluminum also has stronger material properties which means it can handle higher stress too. [/QUOTE]
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Offset Seat Post - More Stress?
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