Can you hang it on a ledger ready for the next lift,or does it stay in situ.till you're ready to move up?and what stops it moving lateraly?seems pretty good to me,is it something that stays out of your way till needed,so you dont feel like your carting extra bits of kit up with you,which is the bugbear with steps and other agr,i would'nt worry about joints,just push the tube up leaving no gap,then pop one on once your up,you'll need to leave a proper tied off single handrail anyway,in order to show your compliance in using some form of agr
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for ease of use, you need to hang it [the upfront] from your ledger, place your AGS handrails and raise the upfront, before erecting the rest of the lift. once you've finished and accessed the boarded lift you will be behind the AGS handrails. your first job would be to fix the AGS handrails securely to your standards. You would leave the upfront in situ, out of the way, until you had run your next set of ledgers in, then the process would begin again. If you were doing a brickies lift, then you would remove them after being securely fastened and move them to the next plot.
never noticed any lateral movement but thinking about it, there will be some until fixed securely. the longer the run, i imagine, the less lateral movement there will be
on a long run the handrails would be joined before raising. Because of a series of holes to the outer tube it can be raised gradually from one end of the run, to the other.