But yes, I believe where Petzl have given a 2.5nm specification, the gravity/weight on a lever of specific length will pass any legal challenge and will also be LOLER inspected before it is put to work. Provided I get the correct weight and lever values, which will be verified to be correct before use.
Converting this system, noting the central metal parts which shouldnt have, but do have, rough edges. It is making the webing fray. Note the main webing is not sewn to the harness, it threads through the side rings and around the back, which will aid replacement.All this does is allow removal/refitting of the straps into the ring? It doesn't provide any thing in the way of safety in a fall.
If the bolts failed the system would open, and I'd fall to the ground.All this does is allow removal/refitting of the straps into the ring? It doesn't provide any thing in the way of safety in a fall.
I am aware of these facts and I put considerable effort to ensure I know far more detail in the subject as my life depends on it. I find it funny how climbers generally trust their employers to maintain kit and I have seen the stateffor some of it. I know the history of my kit..Arrr,,,, the fabled "LOLHER Inspection" completed by someone who has shown a basic understanding of mechanical inspection and HSE Law, that has pasted a very basic test....
I used to work the powered access industry and was a CAP Card holder to inspect the access platforms, we also done LOLHER inspections on other pieces of equipment for lifting proposes, that the company owned.
We also had third party inspections from independent inspectors on some very large construction jobs, some who worked for major insurance companies, some of these inspector didn't know about some of the safety systems built into the large machines or even how to test them, a LOLHER Cert doesn't means its totally safe.
All it really means it's been inspected visually by someone who understands mechanical equipment for major visible faults. An inspector won't ask to see the torque wrench used to tighten a bolt or even its test cert this only happens if there's an accident.
I'll bet most harness inspections take no longer then 5 mins, look at the harness label, check the serial number against the paperwork and check for damage/excessive wear.....pass or fail....
But, you also need to account for the weight of the arm.
The weight of the arm will always act at its centre of gravity. So if it is a uniform cylinder 1m long, its weight will be act at 500mm from the pivot.
We had this discussion recently about how long a scaffold tube you would need to apply 300Nm to a bolt just by its own self-weight.
Yep!So, if the equivalent of 2.5nm is 254gm..
(Ie, a 254g weight on the end of a weightless 1m long tube)
If the arm weighs 100grams, what's the maths to work that out?
How close would I be by taking off half the weight of the arm?
Ie guessing at a 100g arm with 204g on the end of it?
How close would I be by taking off half the weight of the arm?