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Conclusions |
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| The force on each anchor is greater on a longer line than a shorter line, for a given amount of sag. The more sag we allow the line to have for a given length, the less force is placed on each anchor. There is a graph of these results in the analysis section. What does this mean for a typical slackline setup? Consider a 20-foot line and a 180-pound person. Even with only a foot of sag, the force on each anchor is under 1000 pounds. Considering that standard webbing has a strength around 4000 pounds, this should not be a problem. If we increase the sag to two feet, the force on each anchor drops under 500 pounds. A 75-foot line with one foot of sag requires a force at the anchors of just under 3500 pounds, again for a 180-pound person. This is pretty close to the breaking point of the webbing, especially since we are ignoring factors such as bouncing and walking. However, this is a very small amount of sag for such a long line. Given three feet of sag, the force at the anchors drops to under 1500 pounds. With five feet of sag, the force drops under 750 pounds. This convinces me that shorter lines, around 30 feet in length, are quite safe with standard climbing equipment. It makes me want to do further analysis of longer lines, however, in the 75-foot range. |
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Further Questions |
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| Links indicate that the question has been analyzed further. Click on a link for more information. | ||
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