IWH certified professional from SA Rope Access. All relevant safety procedures including fall protection plans should be followed for activities involving high structures
Last week I wrote about the tensegrity structures we built at Pop Bolton 2013 in Benoni. One of the other bases involved abseiling from a 16m platform on a crane. The platform was built in much the same way as a raft base would be built, then raised up on the crane arm and secured against the mast like you would against a tree (cranes are much easier to lash onto than trees; they are square and don't need to be protected from damage). The photographs on the left show the construction sequence.
Thanks to Mark Stevens for the photographs, and Greg Gardiner from SA Rope Access for running the base