I will double the straps through a lifting ring attached to the corners.
I plan to buy and use nylon or woven type straps I will get from the local supply house. What load rating do I need? Thanks for your help!
2006-10-22 16:34:57 · 6 answers · asked by Dave 1 in Science & Mathematics ➔ Engineering
Assuming the straps are located equal distances from the center of gravity, not pulling at an angle, and in a basket configuration you will only need four 500 lb straps. But you have to consider the angle you are pulling, the center of gravity of the object, and type of connection you are going to use.
If your straps go up at a 45 Degree angle the tension in the strap would be 1.41 times greater than the actual weight you are lifting. If the angle is smaller than there will be even more tension.
All lifting straps will have a rating based on what type of connection you use. If you use a choker configuration the strap is rated for much less than if you use a straight pull. But if you use a basket like you are planning then you can lift twice as much.
And if the object's weight is mostly on one side...and the straps are at 4 corners, the straps nearest the most weight will actually carry most of the load.
All things considered, straps are cheap and dropping things is dangerous....Always OVER rig.
Good luck
2006-10-22 17:01:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Each corner will need to support 1000 lbs. Doubled up, the straps could theoretically support 500, but the stress at the buckle would suggest at least 1000. As a safety factor, increase each to 1500 or 2000.
2006-10-22 16:44:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Each strap should be able to carrry the entire load if something catastrophic occurs. Additionally, the straps should be able to handle ~2x the load to account for any sudden shocks or other anomalies.
2006-10-22 16:46:26 · answer #3 · answered by arbiter007 6 · 0⤊ 0⤋
1
2017-02-17 16:39:25 · answer #4 · answered by ? 3 · 0⤊ 0⤋
You would need a strap that would have the load rating more than what you are lifting.
4000lbs need a 5000-6000lbs rating
2006-10-22 16:40:40 · answer #5 · answered by dragonsaver005 4 · 0⤊ 1⤋
i would get straps rated at 4000lbs. because if any one of them breaks the other ones have to hold the load.
2006-10-22 18:25:20 · answer #6 · answered by ted g 1 · 0⤊ 0⤋