Demag’s new AC45 City is designed for tight spaces

Following the resurrection of the Demag brand in 2016, Terex has also brought back the City series of cranes.

In 1997, Demag’s AC40 became one of the most successful crane in its class selling more than 1,000 units and earning the title of “Crane of the Year.”

Now, with its AC45 City crane, Terex Cranes is debuting the latest model of the series.

“That means that we really have to deliver on two fronts. After all, the Demag City class stands not only for quality, but also for innovative technology,” said Frank Schröder, director of product management all terrain cranes. “This is why the new Demag AC 45 City is not just able to do everything its legendary forerunners were already able to do: It is able to do it much better.”

The new three-axle unit presents a new level of compactness in the 45-tonne lifting capacity class with a total length of 8.68 metres, a width of 2.55 metres, and an overall height of just 3.16 metres.

Its height may be reduced to less than three metres, making the crane ideal when space is at a premium, as is the case indoors.

Since the base section of its fully hydraulic main boom is also compact with a length of 7.80 metres, the AC 45 City is also able to work in buildings with a relatively low clearance while still keeping its boom at a steep angle. This advantage comes in handy, for example, when assembling overhead cranes. In addition, its fully hydraulic 31.2-metre main boom means it is ready to start working much faster than comparable cranes with booms with pins.

IC-1 Plus control system

The IC-1 Plus control system calculates the crane’s lifting capacity for every boom position as a function of the superstructure’s slewing angle, and in real time. This means the lifting capacity for a specific radius is no longer limited to the lowest value for a pre-calculated 360 degree lifting capacity. Instead, the crane can always take full advantage of the maximum available lifting capacity. This advantage is particularly useful when it comes to lifts in which the outriggers are extended in an asymmetrical configuration, as it enables the AC 45 City crane to take care of jobs that would normally be the exclusive job of larger cranes.

In addition to the real-time calculation for lifting capacities dependent on slew angle, the IC-1 Plus control system also has a “smart” feature to calculate and show the working range of the real time lifting capacity within +/-30 degree slew angle. As well, the control system features an automatic counterweight detection function that the crane operator needs to confirm. Together with the IC-1 Plus control system, the new Demag crane is able to work with any outrigger configuration.

The AC 45 City  also features an automatic leveling system that allows the crane to balance itself with computer assistance when the outriggers are extended.

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