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Topic Date User

Clipping in with a daisy chain 8-Sep-2010 At 11:43:53 AM EJ

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On 8/09/2010 ajfclark wrote:

>The article states that the bar tacking fails somewhere around 500lbs
>~= 2.2kN. That might sounds like quite a lot but in a static system it
>doesn't take much of a fall to generate that much load.

So lets say you clip into a loop approximately halfway along the daisy chain, then into a load limter (e.g. screamer which activate at ~4Kn), if you shock load the system and bar tacks fail at ~2.2 Kn which is below the load limiter activation. Therefore, so long as the full force of the shock load is absorbed by the bar tacks failing then the anchors and you never experience >2.2kn. If however the bar tacks fail all the way through to the final loop and the full force hasn't been absorbed, this is when the load limiter may kick in and limit the resulting load to a maximum of 4kn.

If there is no load limiter would it still be considered a "shock"load to the system if all the bar tacks failed?