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Ok, plenty of info there !
I might add, that any welding is an art in itself, some pick it up straight away and others can never get it ? It very wise to have someone else who can weld looking with mask as you weld so they can point pout what needs to be attended to etc, , How strong, how far from the material, how fast/slow to move, it all varies with every job ! things you'll learn as you go !
As for stick welding Peirs, Than thats some moderate thick steel, 10-12 even 15mm, maybe more ,, thick plate. I used 12mm bottom plate to 10mm gussets and an 8mm wall pipe, my 40-140amp welder was struggling to penetrate into 10mm or more, so I had to do some 'fish welds' youll learn about them in due time, but I think its pretty strong, besides, it is only a telescope peir, Not brackets holding a multi story building Lift, : ) Some smaller arc/stick welders only max out at 100ampsand will be struggling to penetrate 7-8mm.
In theory,rule of thumb, but not quoting, a 1 inch weld in 10mm steel properly done should hold a tonne of weight ! !
Once you learn welding, it sure come in handy ! cheers & all the best with it ! !
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