RESIDENTIAL CONSTRUCTION Ӏ SECTOR REPORT
targeting the housebuilding sector. The first model in the range is
trailer crane is powered by a lithium battery, large enough for a full day’s work. The crane can be charged using a 230v power supply, and is able to work while charging. Böcker also offers two electric
trailer cranes, the AHK 30e KS and AHK 36e. The AHK 30e KS offers a maximum capacity of 1.5t, at heights up to 30m and with a reach of up to 22.4m. The AHK 36e – which Böcker claims as the most powerful trailer crane in its class – can reach heights up to 36m and lifts loads of up to 2.4t. German roofing company
Heiße, from Marsberg-Essentho, put one of these units to the test on a recent job, re-roofing a family home in Bad Wünnenberg. On arriving at site, the trailer travelled under its own power to an optimal position in the home’s driveway. The crane was used to remove old concrete roof tiles, reaching over the roof at a radius of 23m, and carrying loads of up to 250kg at a time in a skip. Tile removal was completed in two hours. The crane was then fitted with a pallet fork to carry wood fibre panels, to be used to insulate the roof, again carrying 250kg at a time. The trailer crane was charged
while working, using a 230v socket in the home’s garage. The crane was able to work while charging.
22 CRANES TODAY
Klass’ first truck crane with battery- powered lifting, the K700 E
The Klaas K280
A boost mode allows the operator to top up the battery quickly, in just 15 minutes. When idle, the battery can be charged from 20% to 80% in an hour. Power use is optimised using a stop-and-go system, which only activates the electric motor as needed. This allows the crane to work longer, when an electrical connection is not easily available.
A SELF-ERECTOR FOR HOUSEBUILDING While the lightweight boom crane sector has offered a rapid expansion of electric options over the last year, self-erectors have long been electric-powered. Potain, Manitowoc’s tower crane brand, now offers a new range of self-erectors, Evy, squarely
the 4t Evy 30-23. The crane has been engineered with home and residential building construction, up to three stories high, in mind. At the tip of its 30m jib the crane can lift loads of up to 1t. The jib can be angled at 10, 20, or 30 degrees. This allows the standard height under hook of 22.9m to be increased to 35m, with the jib raised to 30 degrees. The jib measures 30m long. This can be shortened to 24m, when needed, and can also be folded back on itself hydraulically, to just 15m. The crane is supplied with
Potain’s CCS Crane Control System, Smart Set-up, Power Control, and Drive Control, designed to provide operators with complete control and precision on the jobsite. Its ergonomic design improves operator comfort, says Potain, as it reduces manual operation and lessens operator fatigue. Potain CONNECT telematics allow owners to monitor and analyse crane utlilsation, with remote and local diagnostics using Potain’s Access and Assist applications. The crane is powered by a
three-phase power supply. It uses permanent four-fall reeving and is designed for fully automated
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