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News » US » Linden Comansa’s largest luffer makes US debut » published 24 Apr 2018

Linden Comansa’s largest luffer makes US debut

The first of Linden Comansa’s new LCL700 model to arrive in the US is being put to work on Amazon’s headquarters expansion in Seattle, Washington.

images by Fueled Industries/Colby Williams Above: images by Fueled Industries/Colby Williams

The LCL700 is the manufacturer’s largest luffing-jib tower crane from Linden Comansa. GLY Construction will use the 64-tonne luffer to build the Rufus 2.0 Block 21 project, part of the new headquarters. This project will include two office buildings, of 24 and 8 stories, and is part of Amazon’s urban campus, which already hosts more than 40,000 employees in the city centre.

The LCL700 model was launched in April 2017 with two versions of maximum load 110,230lb and 141,090lb. It is designed to be used mainly on sites with reduced space, such as ones in congested city centers. Over the last 12 months a few units have been sold in Asia, and the first unit in America - both North and South - has just been erected in downtown Seattle. The crane had to be erected rapidly, as two of the surrounding roads could only be closed to traffic for 48 hours.

The design of the LCL700 and the features that come as standard were key in achieving the erection target. The LCL700 is delivered from the factory with pre-assembled luffing reevings, allowing the erectors to work faster and reduce the erection time. The crane also includes a support winch, used to lift and put in place the auxiliary ropes of the jib, or to displace and install the heavy reeving pulleys without needing the support of a mobile crane, among other functions. The crane was assembled by a team consisting of technicians from Linden Comansa’s headquarters in Spain and Linden Comansa America, working with the local erectors from Northwest Tower Crane.

The crane was erected with full jib of 213.3ft and initial tower height of 66.9ft, but it will be climbed to a final freestanding height of 196.9 ft. For this site, the LCL700 will be used with single line pull, to lift maximum loads of 70,550lb, but a simple manual change to double line system could make the crane load up to 141,090lb.

Linden Comansa America has also supplied GLY Construction with a flat top model, the 21LC550 20t, for use on the Rufus 2.0 Block 21 site.


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This article was published on 24 Apr 2018 (last updated on 24 Apr 2018).

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