What heights do u need a harness for(had to repost as didnt explain correctly in last 1)
That first answer is correct. When I worked as a construction electrician back in the 1980's the OSHA requirements were not so strict, but now the harnesses and tie-offs are required for any work platform over 6' from the ground.
OSHA says that you need guardrails, safety nets or a fall-arrest system if you're working or walking near an unprotected surface more than 6' above a lower level.
