New Jaso tower at SMOPyC
By Alex Dahm05 April 2011
Jaso's new J420 tower crane is being presented at the SMOPyC construction equipment exhibition in Zaragoza, Spain, from 5 to 9 April.
The Spanish tower crane manufacturer's latest offering has a maximum 85 m jib and 24 tonne load capacity. Tip load is 2.5 tonnes and the model sits in the range below the top of the line J600. Primary features are ease of transportation and assembly for a crane of such dimensions, according to the manufacturer.
While it is not a flat top design, the height of the central slewing section at the head of the tower is less than some models of that type, Jaso said. Jib deformation is less than in a flat top tower design and jib assembly is quick and easy in sections, Jaso claimed. It uses a single trolley and hook block system for both single (two falls) and double (four falls) reeving. For maximum working height a hook run of 400 m is offered in double fall mode.
Erection is simplified by all parts leaving the factory pre-installed to save time and effort and to allow quick and uncomplicated assembly, Jaso said. The square base is 2.16 m and internal jacking in small space is possible. For countries where it is required, a second clamp type brake is available on the hoist. All components of the crane can be shipped in standard closed shipping containers, Jaso said.