Dear all seniors,
I have a doubt regarding the steel ropes that are used for the lifeline purpose. These ropes are placed horizontally on sheets and have a length of around 40 meters with a diameter of 10mm and a steel core. Our team of 4 to 6 sheeting persons anchor at a time on this lifeline. Can you please explain the exact breaking force of these lifelines and how many team members can anchor on it?
Thanks in advance.
Subin
From India, Delhi
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2I have a doubt regarding the steel ropes that are used for the lifeline purpose. These ropes are placed horizontally on sheets and have a length of around 40 meters with a diameter of 10mm and a steel core. Our team of 4 to 6 sheeting persons anchor at a time on this lifeline. Can you please explain the exact breaking force of these lifelines and how many team members can anchor on it?
Thanks in advance.
Subin
From India, Delhi
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Dear Subin,
Take a look on attached chart which was clearly given a breaking strength of rope you can get the same chart from your manufacturer at the time of purchasing.
For example:
The chart shows for 3/8'' inch or 10 mm steel rope Minimum breaking strength is 12200 lbs per feet; safe load 2400 per feet.
So their is no problem in wire rope.
But as per OSHA standard Anchorage point should withstand 5000 lbs; may you will ask the question to me why 5000 lbs?????
But where did the actual number of “5,000” lbs OSHA anchorage strength come from? And why is it 5,000 lbs and not 3,000 lbs, or 10,000 lbs? My research has led to many different explanations, from the theory that 5,000 lbs was the ultimate strength of the old Hemp rope originally used in fall protection, to the theory that European medical testing showed that 2,700 lbs was the limit of harness force before injury took place (OSHA approximately doubled it). -- Explaination given by Mr.Arnold Timothy Galpin, P.E.
As long as a Competent Person (as defined by OSHA) can determine the attachment point can withstand 5,000 lbs without failure in EVERY direction that the forces will be applied, it will be OK for use per OSHA. This type of anchorage is called a “Non-Certified Anchorage” because a Qualified Person did not certify it.
OSHA 311 - Fall protection competent person required for million dolor projects it's not mandatory most of client's requesting to contractor now a days.
Note: Anchorage points must be able to support 5000 lbs per person
I hope answered your query.
If you have any doubt don't hesitate to contact us. we are here to help each other.
From United States, Fpo
Acknowledge(0)Amend(0)
Take a look on attached chart which was clearly given a breaking strength of rope you can get the same chart from your manufacturer at the time of purchasing.
For example:
The chart shows for 3/8'' inch or 10 mm steel rope Minimum breaking strength is 12200 lbs per feet; safe load 2400 per feet.
So their is no problem in wire rope.
But as per OSHA standard Anchorage point should withstand 5000 lbs; may you will ask the question to me why 5000 lbs?????
But where did the actual number of “5,000” lbs OSHA anchorage strength come from? And why is it 5,000 lbs and not 3,000 lbs, or 10,000 lbs? My research has led to many different explanations, from the theory that 5,000 lbs was the ultimate strength of the old Hemp rope originally used in fall protection, to the theory that European medical testing showed that 2,700 lbs was the limit of harness force before injury took place (OSHA approximately doubled it). -- Explaination given by Mr.Arnold Timothy Galpin, P.E.
As long as a Competent Person (as defined by OSHA) can determine the attachment point can withstand 5,000 lbs without failure in EVERY direction that the forces will be applied, it will be OK for use per OSHA. This type of anchorage is called a “Non-Certified Anchorage” because a Qualified Person did not certify it.
OSHA 311 - Fall protection competent person required for million dolor projects it's not mandatory most of client's requesting to contractor now a days.
Note: Anchorage points must be able to support 5000 lbs per person
I hope answered your query.
If you have any doubt don't hesitate to contact us. we are here to help each other.
From United States, Fpo
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