I'm not concerened about the initial forces applied during the pulling force to clear the victim of the tower I was more curious about the forces on the topside directional pulley and the bottom side directional pulley when the load is about midspan. If we are talking about two different things feel free to delete my post One other note.As with any other time you tension a rope, you only tension as much as needed to get the job done. You would need to know the load, the angle (distance of the anchor from the base) and then it would be dependant on how much tension was actually needed. There are too many variables to tell you what the forces would be. If an MA is used again it should be used sparingly.
First, if a handpull is used to tension, the pullers will feel the reactive forces and will not be able to overload the system. To be honest, I wouldn't be overly concerned with the forces in this application. This should amount to very little tension in the system. The term skate block is generally used in tower applications in that environment tension would only be applied to clear the tower and the fence. The only purpose of tensioning the guiding line is to clear the obstacle. With that being said, we recommend that tension be applied with personnel only (2 people with no MA), or with a minimal MA with minimal personnel (I wouldn't use more than a 3:1 with 1 or 2 people). The guiding line system aka: skate block, is a low-tension technique. We decided it best for the training community and from an applicaiton stand-point to seperate the two.
When we were outlining topics for my book we wrestled with application of low- and high-tension systems. If you are talking about a sloped tesnioned line than a completely different response will be required I assume by "skate block" you mean a low-tension guiding type line.
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