Paddy,
Just something I'm tossing around in my mind, If the first and last outside standards were sway braced in opposite directions, you'd have a rigid connection point both ends of the scaffold to attach a device similar to a ratchet strap encased in a reel, tightened up it would be similar to a lifeline on structures such as piperacks which you can use if you clip on, of course you still have to access the 2 standards to clip on and ratchet, but its only 2 compared to the whole line of standards if you're using the step.You could also take a measurement on the 2 standards as for guardrail height and once ratched up you have a level for your doubles. Once your guardrail is on, it's reeled in ready for the next lift. Note. I would imagine it would have to be certified periodically as is the case with slings and such like. The B. Safe. AGR system seems to be a good system, but expensive, but I also can envisage though not mentioned in the sale promotion, that it too will require periodic certification.
---------- Post added at 04:29 PM ---------- Previous post was at 03:29 PM ----------
Stewart.
Agree, time wise, cost wise, best to use the gear at hand, see your point with the sliding guardrail but you've still got to put the first 21 in from the lift below before you can access the lift and a problem is some sites wont allow it and you could argue the rights and wrongs all day with the S/O but if his minds set you get no work done unless its done his way and that costs money. The ratchet strap device thing I was thinking about is just something I thought about as a possible quicker, cheaper way to keep everyone happy and of course safe. Your right, it has to be on the inside of the standards, you would walk it on the lift by passing it over the transoms, but you still would need to access the 2 standards but not to fix a tube. The staggered standards would be a problem, could it be overcome?, possibly, with a bit of thought. As I've said in the previous post, I would imagine it would need to be certified periodically but then I would envisage all AGR systems will have go through the same process, after all their marketed as life saving devices, another cost.
PS. A possible advantage with a strap system would be that you would'nt have to hemp over a guardrail, It would be possible to hemp a tube in the normal manner by inserting it in the inside of the strap.