AC 80-4: New Demag four-axle all terrain crane

The new Demag AC 80-4 rounds out Tadano and Demag all terrain crane portfolio up to 100 t. Designed for the global market, this four-axle 80-t all terrain crane has a maximum main boom length of 60 m.

If the main boom length is not enough, the reach can be extended with a 6.5‑m extension that can be offset by 25° and 50°. “Its capacity is a generous 23.8 t, meaning it can be used to lift heavy loads over obstacles,” said Demag.

In addition, a 1.50-m runner with a capacity of 26.6 t is available for the Demag AC 80-4. Accordingly, the crane is also recommended for indoor projects. The main boom can be lowered up to 3° below its horizontal position, so that potential work at height can be easily eliminated and the jibs can be installed quickly and safely.

In the class of up to 100 t, no other crane comes close to the AC 80-4’s lifting capacity with a fully extended boom up to a radius of 30 m, according to Demag. The crane can lift an impressive 5.4 t at a radius of 14 m.

The manufacturer said the AC 80-4 also raises the bar with its main boom extended to 50 m. “At a radius of 10 m, it can lift 9.7 t, which is 2.2 t more than the next most powerful competitor.” The crane features a line pull of 66.9 kN.

Demag already had an 80-t crane, the AC 80-2. “The worldwide success that this model had, showed that there’s significant interest in a crane with this kind of lifting capacity. In fact, a large number of customers kept confirming this time and time again. That’s why we decided to add the AC 80-4 to our product portfolio in the segment of up to 100 t,” explained Michael Klein, Demag product marketing manager.

The AC 80-4 features a compact design, with nearly all of its dimensions being shorter than those of other four-axle units in its class, revealed Demag. The crane’s total length is 12.15 m, the carrier length is 10.60 m, its height does not exceed 3.85 m, and the front overhang is a modest 1.49 m. “Together with its width of only 2.55 m, our AC 80-4 is better suited for tight work sites than any other crane in its class,” said Mr Klein.

The AC 80-4 has a sophisticated counterweight design, which makes it possible to have a maximum counterweight of 17.7 t. On the road, it can transport up to 9.3 t of this counterweight itself while remaining under a 12 t-axle load limit, and all while also carrying the 6.5-m swing-away jib, said Demag. “Even when staying under an axle load limit of 10 t, it can carry 3.3 t of counterweight.”

Demag Surround View system

Once at the work site, the new Demag Surround View makes it easier for the operator to position the AC 80-4. This system uses the four crane cameras to show a computer-assisted diagram of the possible outreach of the outriggers, as well as the counterweight tail-swing radius at the crane’s current location.

“Demag Surround View displays in the carrier cabin the different outrigger widths so the crane operator can position the crane on the construction site, in order to extend all outriggers sufficiently far and ensure the required slewing radius. This reduces time-consuming measuring and trial and error when looking for a location, so that the crane can be ready for operation more quickly,” explained Mr Klein.

The Demag Surround View system also supports the driver on the way to the construction site. The cameras can deliver images of the crane side areas when turning, facilitating the crane driver to detect cyclists, pedestrians, or any obstacles.

IC-1 Plus and Remote systems

The AC 80-4 is equipped with the Demag IC-1 Plus control system – which, during operation, calculates the crane’s lifting capacity for every boom position as a function of the superstructure’s slewing angle. “This means that the maximum available lifting capacity can be used with any outrigger configuration, including asymmetrical ones,” said Demag. “This advantage is literally maximised when combined with the Flex Base system, making it possible to extend the outriggers to any point within their range.”

The crane also comes with the IC-1 Remote telematics solution. It allows to remotely read and diagnose all important crane data and enables owners to integrate the AC 80-4 into their fleet management system.

Moreover, the AC 80-4 is fitted with the E-Pack, an electro-hydraulic system designed to be connected to the crane. It has an integrated 32-kW electric motor that results in quiet zero-emission crane operations. Specific applications for the E-Pack include crane jobs inside buildings, in dense urban areas, and at night in residential areas.