In reply to JLS:
> "Nailing" - What's that then?
placing several/many peg on a pitch
> "Rivet ladder" - I take these are only placed on the first ascent and subsequent assents simple place some sort of hanger on the insitu rivets?"
a long line of bolts which might not be that deep or of large diameter and might not have hangers - on popular easy routes several will have been replaced by good bolts for safety. You can buy little wire hangers for them.
> "Hooking" - Are hooks normally left in place as runners or is it case of working you way up the pitch with only two hooks, getting further and further run-out?
On easy routes always just working your way up with just two hocks. Not left as pro. On A4 some might get left as pro.