For the building maintenance of the recently completed 20 Old Bailey project in London, England, one Palazzani spider lift XTJ 43, in crawler version and Bi-energy (Diesel+AC) power execution, entered in action. Thanks to the possibility to become a spider crane with 500 kg hydraulic winch, it is used in total versatility for aerial working and material lifting. With its working height of 43 meters and 8520 mm length, this machine can operate both outdoor and indoor, and enter the narrow doors and corridors of this building. 20 Old Bailey is the England and London’s most famous courthouse, which has been completely reorganised and enlarged to 235,000 sq. ft of designed office space.