Posted By William i would not recommend using the crane as an anchorage point, too many things that could go wrong. The main issue for you would be the fall from a great height so i would clip myself onto the platform being installed itself. You should be able to do this using a sling and shackle, although this is not ideal there is not much else you can really do and all you are doing is just taking the slings off so it wont be for a long time. The crane idea sounds OK in theory, but then you have account for what would happen in the event of equipment failure, operator error and too many other variables, there is also the LOLER issue as if you did use the crane it would then be subject to conditions of LOLER for equipment used for lifting people and the inspection regime which is every 6 months i think?