How do I put on a safety harness? Where is the best place to anchor myself if I am working at heights? What is the difference between scaffolding and a work platform? What are the different classes of scaffolding? Are these scaffold classes the same for rolling work platforms as for fixed work platforms? How many people may stand on a work platform at the same time? How do I have my work platforms certified, and how do I complete the green card? Does my employer have to give me authorisation to work on a work platform? What are my responsibilities as an authorised person?