damo
Well-Known Member
"the load on the webbing is likely to be an order of magnitude more than that experienced by the faller."
Agreed, but someone going over the side will not achieve anything like a Fall Factor 2 fall - the max possible.
BTW Offshore Special Regs require jackstays:
"comprising stainless steel 1 x 19 wire of minimum diameter 5 mm (3/16 in), or webbing of equivalent strength. 20kN (2,040 kgf 04 4,500 lbf) min breaking strain webbing is recommended"
Made up 25mm polyester stitched jackstays just about comply (25kN); my knotted ones may do, taking account of the reduction due to the knots, but I am not too worried about it /forums/images/graemlins/grin.gif There is a compromise in the tightness of a jackstay - as tight as possible to reduce how far you can go sideways means an increase in the forces involved on the attachment points.
I am a lot more concerned with safety lines, which cause a noticeably bigger shock on the body due to the lack of "give" in the system. Being brought up short is much more painful.
Agreed, but someone going over the side will not achieve anything like a Fall Factor 2 fall - the max possible.
BTW Offshore Special Regs require jackstays:
"comprising stainless steel 1 x 19 wire of minimum diameter 5 mm (3/16 in), or webbing of equivalent strength. 20kN (2,040 kgf 04 4,500 lbf) min breaking strain webbing is recommended"
Made up 25mm polyester stitched jackstays just about comply (25kN); my knotted ones may do, taking account of the reduction due to the knots, but I am not too worried about it /forums/images/graemlins/grin.gif There is a compromise in the tightness of a jackstay - as tight as possible to reduce how far you can go sideways means an increase in the forces involved on the attachment points.
I am a lot more concerned with safety lines, which cause a noticeably bigger shock on the body due to the lack of "give" in the system. Being brought up short is much more painful.
