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How deep to place a deadman anchor for a slackline?
How to remove a brass concrete anchor?How to anchor zipline to houseDid I install my sleeve anchor correctly?What type of anchor should I use for ceiling hook for ceiling fan?What type of anchor for fastening to block wall?Wall Anchor for shower door sliderHow to remove plastic anchor from brick?concrete ceiling anchor: how much weight can it support?Double expansion concrete anchorDrilling depth for 3" anchor sleeve?
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I want to place a permanent anchor for a slackline in my parents' backyard. I looked around at the different options, but I don't have access to some of them (e.g. no duckbill anchors), so I think I will go for the deadman anchor option as in this video.
I also found a diagram for what it should look like, but I am taken aback at the suggested trench depth of 3-4 foot.
I will be digging with a hoe and my own two hands. The soil where we live gets quickly into compacted clay, after maybe only 2 feet of something more humuslike - my father tells me he once rented an excavator to make a posthole and it needed over half an hour for that hole (operated by somebody experienced, not by my father).
So, I wonder if the diagram I found is not overly sturdy, and if I could get away with a shallower trench. Especially since this diagram also foresees getting concrete poured into the ground, and the person in that video gets away with just a buried length of pipe.
I found a slackline calculator and it says that the normal load will be in the 7-8 kN range, and possibly up to 11 kN under some circumstances (e.g. if it gets tightened a lot and somebody heavy tries to walk on it). So let's say I want the whole line to hold up to 15-17 kN just in case (that's breaking load, not nominal load). There is a tree to hold one side up. For the second side, if I bury a 3 feet long pipe with maybe 2 inches diameter, what depth should I choose?
anchor fastening
asked 3 hours ago
rumtschorumtscho
3732514
add a comment |
I want to place a permanent anchor for a slackline in my parents' backyard. I looked around at the different options, but I don't have access to some of them (e.g. no duckbill anchors), so I think I will go for the deadman anchor option as in this video.
I also found a diagram for what it should look like, but I am taken aback at the suggested trench depth of 3-4 foot.
I will be digging with a hoe and my own two hands. The soil where we live gets quickly into compacted clay, after maybe only 2 feet of something more humuslike - my father tells me he once rented an excavator to make a posthole and it needed over half an hour for that hole (operated by somebody experienced, not by my father).
So, I wonder if the diagram I found is not overly sturdy, and if I could get away with a shallower trench. Especially since this diagram also foresees getting concrete poured into the ground, and the person in that video gets away with just a buried length of pipe.
I found a slackline calculator and it says that the normal load will be in the 7-8 kN range, and possibly up to 11 kN under some circumstances (e.g. if it gets tightened a lot and somebody heavy tries to walk on it). So let's say I want the whole line to hold up to 15-17 kN just in case (that's breaking load, not nominal load). There is a tree to hold one side up. For the second side, if I bury a 3 feet long pipe with maybe 2 inches diameter, what depth should I choose?
anchor fastening
asked 3 hours ago
rumtschorumtscho
3732514
If it's what I've typically seen (i.e. low to the ground and you expect to fall off it regularly while learning anyway) you can figure that the deadman ripping out of the ground will not likely injure anyone (you'll either find the line on the ground or fall off as it lurches) and you can try what you like and re-do if it fails. Otherwise I'd suggest borrowing, renting, or purchasing a pick & a shovel to aid the digging in compacted clay, which will be ludicrously difficult with only a hoe.
– Ecnerwal
57 mins ago
add a comment |
I want to place a permanent anchor for a slackline in my parents' backyard. I looked around at the different options, but I don't have access to some of them (e.g. no duckbill anchors), so I think I will go for the deadman anchor option as in this video.
I also found a diagram for what it should look like, but I am taken aback at the suggested trench depth of 3-4 foot.
I will be digging with a hoe and my own two hands. The soil where we live gets quickly into compacted clay, after maybe only 2 feet of something more humuslike - my father tells me he once rented an excavator to make a posthole and it needed over half an hour for that hole (operated by somebody experienced, not by my father).
So, I wonder if the diagram I found is not overly sturdy, and if I could get away with a shallower trench. Especially since this diagram also foresees getting concrete poured into the ground, and the person in that video gets away with just a buried length of pipe.
I found a slackline calculator and it says that the normal load will be in the 7-8 kN range, and possibly up to 11 kN under some circumstances (e.g. if it gets tightened a lot and somebody heavy tries to walk on it). So let's say I want the whole line to hold up to 15-17 kN just in case (that's breaking load, not nominal load). There is a tree to hold one side up. For the second side, if I bury a 3 feet long pipe with maybe 2 inches diameter, what depth should I choose?
anchor fastening
asked 3 hours ago
rumtschorumtscho
3732514
I want to place a permanent anchor for a slackline in my parents' backyard. I looked around at the different options, but I don't have access to some of them (e.g. no duckbill anchors), so I think I will go for the deadman anchor option as in this video.
I also found a diagram for what it should look like, but I am taken aback at the suggested trench depth of 3-4 foot.
I will be digging with a hoe and my own two hands. The soil where we live gets quickly into compacted clay, after maybe only 2 feet of something more humuslike - my father tells me he once rented an excavator to make a posthole and it needed over half an hour for that hole (operated by somebody experienced, not by my father).
So, I wonder if the diagram I found is not overly sturdy, and if I could get away with a shallower trench. Especially since this diagram also foresees getting concrete poured into the ground, and the person in that video gets away with just a buried length of pipe.
I found a slackline calculator and it says that the normal load will be in the 7-8 kN range, and possibly up to 11 kN under some circumstances (e.g. if it gets tightened a lot and somebody heavy tries to walk on it). So let's say I want the whole line to hold up to 15-17 kN just in case (that's breaking load, not nominal load). There is a tree to hold one side up. For the second side, if I bury a 3 feet long pipe with maybe 2 inches diameter, what depth should I choose?
anchor fastening
anchor fastening
asked 3 hours ago
rumtschorumtscho
3732514
asked 3 hours ago
rumtschorumtscho
3732514
asked 3 hours ago
rumtschorumtscho
3732514
asked 3 hours ago
rumtschorumtscho
3732514
asked 3 hours ago
rumtschorumtscho
3732514
3732514
If it's what I've typically seen (i.e. low to the ground and you expect to fall off it regularly while learning anyway) you can figure that the deadman ripping out of the ground will not likely injure anyone (you'll either find the line on the ground or fall off as it lurches) and you can try what you like and re-do if it fails. Otherwise I'd suggest borrowing, renting, or purchasing a pick & a shovel to aid the digging in compacted clay, which will be ludicrously difficult with only a hoe.
– Ecnerwal
57 mins ago
add a comment |
If it's what I've typically seen (i.e. low to the ground and you expect to fall off it regularly while learning anyway) you can figure that the deadman ripping out of the ground will not likely injure anyone (you'll either find the line on the ground or fall off as it lurches) and you can try what you like and re-do if it fails. Otherwise I'd suggest borrowing, renting, or purchasing a pick & a shovel to aid the digging in compacted clay, which will be ludicrously difficult with only a hoe.
– Ecnerwal
57 mins ago
If it's what I've typically seen (i.e. low to the ground and you expect to fall off it regularly while learning anyway) you can figure that the deadman ripping out of the ground will not likely injure anyone (you'll either find the line on the ground or fall off as it lurches) and you can try what you like and re-do if it fails. Otherwise I'd suggest borrowing, renting, or purchasing a pick & a shovel to aid the digging in compacted clay, which will be ludicrously difficult with only a hoe.
– Ecnerwal
57 mins ago
If it's what I've typically seen (i.e. low to the ground and you expect to fall off it regularly while learning anyway) you can figure that the deadman ripping out of the ground will not likely injure anyone (you'll either find the line on the ground or fall off as it lurches) and you can try what you like and re-do if it fails. Otherwise I'd suggest borrowing, renting, or purchasing a pick & a shovel to aid the digging in compacted clay, which will be ludicrously difficult with only a hoe.
– Ecnerwal
57 mins ago
add a comment |
1 Answer
1
active
oldest
votes
It’s based on the 1) angle of repose, and 2) weight of soil, and 3) length of deadman.
7-8kn equals about 1500 - 1,800 lbs.
If the angle of repose is about 45 degrees and your soil weighs about 80 lbs. per cubic foot, then you’ll need about 2,000 lbs. (safety factor) resisting.
Therefore, you need to bury your deadman about 3’ deep if the deadman is 3’ long. (I’d compact all material in the ground.)
I’d worry about a 2” diameter deadman getting pulled through the soil and compacting the soil immediately adjacent to the deadman. You’ll need a wider diameter deadman, such as a 12” wide x 3’ long steel plate welded onto your 2” pipe.
Adjust accordingly for your 15-17kn.
answered 2 hours ago
Lee SamLee Sam
11.1k3819
add a comment |
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It’s based on the 1) angle of repose, and 2) weight of soil, and 3) length of deadman.
7-8kn equals about 1500 - 1,800 lbs.
If the angle of repose is about 45 degrees and your soil weighs about 80 lbs. per cubic foot, then you’ll need about 2,000 lbs. (safety factor) resisting.
Therefore, you need to bury your deadman about 3’ deep if the deadman is 3’ long. (I’d compact all material in the ground.)
I’d worry about a 2” diameter deadman getting pulled through the soil and compacting the soil immediately adjacent to the deadman. You’ll need a wider diameter deadman, such as a 12” wide x 3’ long steel plate welded onto your 2” pipe.
Adjust accordingly for your 15-17kn.
answered 2 hours ago
Lee SamLee Sam
11.1k3819
add a comment |
It’s based on the 1) angle of repose, and 2) weight of soil, and 3) length of deadman.
7-8kn equals about 1500 - 1,800 lbs.
If the angle of repose is about 45 degrees and your soil weighs about 80 lbs. per cubic foot, then you’ll need about 2,000 lbs. (safety factor) resisting.
Therefore, you need to bury your deadman about 3’ deep if the deadman is 3’ long. (I’d compact all material in the ground.)
I’d worry about a 2” diameter deadman getting pulled through the soil and compacting the soil immediately adjacent to the deadman. You’ll need a wider diameter deadman, such as a 12” wide x 3’ long steel plate welded onto your 2” pipe.
Adjust accordingly for your 15-17kn.
answered 2 hours ago
Lee SamLee Sam
11.1k3819
add a comment |
It’s based on the 1) angle of repose, and 2) weight of soil, and 3) length of deadman.
7-8kn equals about 1500 - 1,800 lbs.
If the angle of repose is about 45 degrees and your soil weighs about 80 lbs. per cubic foot, then you’ll need about 2,000 lbs. (safety factor) resisting.
Therefore, you need to bury your deadman about 3’ deep if the deadman is 3’ long. (I’d compact all material in the ground.)
I’d worry about a 2” diameter deadman getting pulled through the soil and compacting the soil immediately adjacent to the deadman. You’ll need a wider diameter deadman, such as a 12” wide x 3’ long steel plate welded onto your 2” pipe.
Adjust accordingly for your 15-17kn.
answered 2 hours ago
Lee SamLee Sam
11.1k3819
It’s based on the 1) angle of repose, and 2) weight of soil, and 3) length of deadman.
7-8kn equals about 1500 - 1,800 lbs.
If the angle of repose is about 45 degrees and your soil weighs about 80 lbs. per cubic foot, then you’ll need about 2,000 lbs. (safety factor) resisting.
Therefore, you need to bury your deadman about 3’ deep if the deadman is 3’ long. (I’d compact all material in the ground.)
I’d worry about a 2” diameter deadman getting pulled through the soil and compacting the soil immediately adjacent to the deadman. You’ll need a wider diameter deadman, such as a 12” wide x 3’ long steel plate welded onto your 2” pipe.
Adjust accordingly for your 15-17kn.
answered 2 hours ago
Lee SamLee Sam
11.1k3819
answered 2 hours ago
Lee SamLee Sam
11.1k3819
answered 2 hours ago
Lee SamLee Sam
11.1k3819
answered 2 hours ago
Lee SamLee Sam
11.1k3819
11.1k3819
add a comment |
add a comment |
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If it's what I've typically seen (i.e. low to the ground and you expect to fall off it regularly while learning anyway) you can figure that the deadman ripping out of the ground will not likely injure anyone (you'll either find the line on the ground or fall off as it lurches) and you can try what you like and re-do if it fails. Otherwise I'd suggest borrowing, renting, or purchasing a pick & a shovel to aid the digging in compacted clay, which will be ludicrously difficult with only a hoe.
– Ecnerwal
57 mins ago