woodworkingboy
TreeHouser
Physics is not my strong point.
When you use a pulley block, say hang it in a tree that you are pulling, does it increase the load on the rope as effecting the working stress that is being put on it? It seems like at the point where the rope goes around the sheave, the tension is being doubled, as opposed to a a direct pull with no block. With a Maasdam puller and the half inch 3 strand polyester line, though the tensile strength of the rope is high, it seems like you would be exceeding the recommended safe working load of the line at 3/4ton pull using a pulley, being somewhere between five and ten percent of the tensile strength. Yes/no?
Thanks for the help, I'd rather know earlier than finding out definitively at a job coming up.
When you use a pulley block, say hang it in a tree that you are pulling, does it increase the load on the rope as effecting the working stress that is being put on it? It seems like at the point where the rope goes around the sheave, the tension is being doubled, as opposed to a a direct pull with no block. With a Maasdam puller and the half inch 3 strand polyester line, though the tensile strength of the rope is high, it seems like you would be exceeding the recommended safe working load of the line at 3/4ton pull using a pulley, being somewhere between five and ten percent of the tensile strength. Yes/no?
Thanks for the help, I'd rather know earlier than finding out definitively at a job coming up.