22kn

[NephroArb]

Hi folks,

Can anyone cast a little light over a technical issue regarding conformity?

Arb Ass recomend harness front anchor point should be 22kn but our company supply harnesses with 15kn, I can't seam to find a definitive answear. Can anyone assist with this concern?

 

Many thanks

 

A confused Treerat

[Tony Croft aka hamadryad]

15 seems low for the point of anchor?

[elicokiz]

The Arb Association guide to good climbing practice states; 3.0 All tree climbing equipment used for PPE should have a minimum breaking strength (MBS) of 22KN.

[Treenurd]

Not a definitive answer but I think the test for harness use in the sit position (EN813?) places a 15KN load on the harness for 3 minutes.

 

If you think about the figures they seem to add up:

15KN = a load of approx 1500kg

Safety Factor of 10:1 gives you a 'safe' climbers weight of 150kg. Does anyone know a climber heavier?

 

'All climbing equipment used for PPE should have a minimum breaking stregth of 22kN' may be due to other equipment potentially being used to suspend two people, as in a rescue. The figures aren't consistent but still gives a 'safe' climbers weight of approx. 110kg.

 

When you look at many rules and regulations, lots of grey areas appear between what looks black and white.

 

Regards

 

Ben

[Simon Stewart]

Clause 12.3.5.2 of BS 7985:2002 recommends a minimum anchor strength of 15 kN.

Does the label say it is meeting the requirements of BS7985:2002 by stating the 15 kN. or is it saying that that is the safe working load? which is different to Minimum Breaking Strength. As far as I am aware all textiles should be 22kN mbs, are you getting your info from a metal part or textile?