Liebherr LTM 1230-5.1
Borger Cranes
This fine Liebherr LTM 1230-5.1 of Borger Cranes is deployed from their branch in Pinkenba (AU) and was used here to erect a Liebherr 290 HC tower crane. The crane was built in 2019.
It is a 230-tonne telescopic crane mounted on a 5-axle carrier. The crane is not painted in the typical Borger Cranes livery, but has been left in the colours of Kelly Green, a company acquired by Borger Cranes.
The carrier is powered by a Liebherr 6-cylinder diesel engine with an output of 400 kW (544 hp). Axles 2, 4 and 5 are driven, and all axles are steerable.
The outrigger base is not rectangular but has a trapezoidal shape. The base is 9.35 metres long and 7.4 metres wide at the front and 8.1 metres wide at the rear. The outrigger mats were made by TRT.
Here, the cab is being moved from the horizontal to the vertical position by the LTM 1230-5.1 and the Franna MAC 25. The cab weighs 9.2 tonnes.
The tower crane was erected with a modest hook height of 32.5 metres. The boom of the LTM 1230-5.1 is telescoped here to a length of 52.9 metres.
The eight-section main boom has a base length of 12.7 metres and telescopes seven times to a maximum length of 75 metres.
Here, the crane was deployed with 52 tonnes of ballast. The ballast can be positioned at two different radii, with a swing radius of 4.83 or 5.73 metres. Here, the larger swing radius was used. The ballast can be increased to 72 tonnes by means of two additional 10-tonne side weights.
Here, the 8.9-metre-long tower head weighing 2.72 tonnes is being installed. The highest point of the tower crane has now been reached.
The crane is equipped with a 10-tonne hoist winch with 23 mm hoist rope.
The long counter-jib, with a length of 21.7 metres and a weight of 7.5 tonnes, is being installed here.
Borger Cranes operates several Liebherr LTM 1230-5.1 cranes; the other cranes are painted in the original Borger Cranes livery, with the carrier and superstructure predominantly red.
The permissible axle loads in Queensland, Australia depend, among other factors, on the width of the tyres. For the fitted 445/95 R 25 tyres, a maximum of 10 tonnes per axle is permitted, which is why the boom is laid back onto a 3-axle dolly during transport on public roads.
Here, the 75-metre-long main boom is being assembled.
After a day of work, the tower crane has been erected and the LTM 1230-5.1 can be dismantled. The ballast and outrigger mats are transported by Volvo FH16 700 combinations.
Liebherr mounting points for the dolly are fitted to the boom. During transport on public roads, the boom is mainly supported by the dolly; the luffing cylinder is also equipped with an additional valve so that the boom can move relative to the base machine.
The hook can remain reeved and is placed in a tray and secured. The dolly is technically approved for a maximum weight of 27 tonnes.
In this transport configuration, the crane is approximately 21.2 metres long, 3 metres wide and 4 metres high.
The complete combination weighs approximately 70 tonnes, including the dolly, folding jib and hook.
On to the next job!
And the next job followed just one day later, in the centre of Brisbane (AU). The crane is erected here in TK configuration.
The main boom is equipped here with the 20-metre-long folding jib, which can be hydraulically adjusted to an angle between 0 and 40 degrees.
The main boom is telescoped here to a length of 68.8 metres.
The street was closed for the work, as several loads had to be lifted onto a roof.
The crane was once again erected with 52 tonnes of ballast at a swing radius of 5.73 metres.
A few days later, the crane drove into the yard of Borger Cranes in Pinkenba. A very fine crane from Borger Cranes!