Germany began securing the Eagle's Nest for eventual restoration after an October 23 arson almost completely destroyed it.
A Super Puma helicopter transported and assembled a tower crane on November 5th.
A temporary roof will protect the ruins during the winter.
The historic 124 m long elevator survived and is active again.
Emergency protection works are expected to be completed in early December.
A 33-year-old German suspect was detained and transferred to psychiatric treatment.