I don't know the OSHA reg, but all the Baker scaffolds that I used when I operated my EC business had safety rails, and toe guards on the upper level. Also there were outriggers that were put on when the units were two (2) sections high (11' +/-). The OSHA inspector looked at it at least two or three times at different sites and did not have anything to say.
However, he did write a 'warning' for a cracked brim on a hard hat.
I do not know about a tie off, or where you could install a tie off on a lot of sites.
A big 'yay' for scissor lifts, genie 1-mans, and tele snorkels. Makes life a lot easier.
