Project Challenge
The Moscow City business complex adds a number of high-rise landmarks to the Russian capital's skyline. For instance, the much-vaunted construction project includes the Mercury City Tower, whose 1,100 ft currently make it Europe's highest building. Such heights require construction hoists capable of traveling quickly, even in adverse conditions with wind speeds up to 45 mph.
<h3>Sky Express</h3>
STROS Sedlcanské Strojírny, a. s., was commissioned to supply mast-climbing equipment for eight new buildings in the Moscow City complex. The Czech company manufactures hoists systems that currently feature capacities up to 7,050 lbs and speeds of up to 328 ft/min. Such systems are fitted with a unique safety device – an original STROS development. This mechanism is triggered whenever the nominal, safe lowering speed is breached: a gear on the output shaft then engages a pinion, which gradually stops the hoist cage. However, in order to avoid such emergencies altogether, a sophisticated drive solution engineered by NORD ensures highly reliable operation.
<h3>Double Back-Up</h3>
If a hoist is out of order, an entire construction site may come to a standstill. Hence, hoist drive solutions must take every available measure to ensure maximum reliability. In order to prevent costly downtimes, NORD DRIVESYSTEMS' concept for STROS hoisting equipment is therefore based on up to three autonomous gearmotor units. They are complemented by an intelligent AC vector drive that provides for particularly smooth movements.