Jaso Adds First Flat-Top Tower Cranes to Product Range
March 30, 2021 - In response to market demand, Jaso has added flat top tower cranes to its model line up.
The first two models in Jaso’s new flat-top family are the J200.12 and J200.10 with respective maximum capacities of 13.2 and 11.1 USt (12 and 10 metric tons). Both models have a maximum radius of 221.5’.
The J200 was prototyped last month, and the J200.12 handled jib-tip loads of 1.87 USt with a single trolley and single reeving (ST-SR) and 1.65 USt at 221.5’ with single trolley and double reeving (ST-DR).
Also, in the optional SR-only reeving mode, the J200.12 lifted 2.1 USt at 221.5’.
Its sister model, the J200.10, will carry an SR-DR trolley and will lift 1.98 USt at 221.5’in SR-DR reeving mode. Using the optional SR-only reeving mode will increase the jib-tip capacity to 2.2 USt at 221.5’ and also offer a maximum lifting capacity of 11.1 USt.
Booms lengths on both new flat-top models start at 98.4’ and can be lengthened in 8.2’ increments.
When the crane is equipped with it full 221.5’ jib, the counterweight tail swing radius is 48.9’. For jibs of 172.2’ or less, counterweight tailswing can be shortened to 42.3’.
Counterweight slabs are the lay-flat type, the same as the weights of the base ballast, common on all Jaso’s latest models. Also, Jaso offers an optional steel frame for higher safety with the counterweight.
The J200.12 comes standard with a 60-hp hoist that delivers up to 498.6 fpm single-line speed.
An optional 88-hp hoist offers line speeds to 738 fpm.
The J200.10 comes standard with a 33-hp hoist. A 60-hp is optional.
For either model, the hoist drum can be specified with Lebus grooving and can hold 4,521’ of rope.
Both models use the standard 5.74’ x 5.74’ tower system with sections 39.4’, 18.7’, and 9.84’ long. Maximum free-standing height is 164.3’.
For taller heights, Jaso is developing the crane to fit the 7.09’ tower system to provide hook heights of nearly 272’.
For the base, Jaso is offering cruciform types 14.7’ x 14.7’ and 19.6’ x 19.6’ for maximum respective hook heights of 157.8’ and 177.1’.
For easier assembly, the heaviest component is the slewing platform with tower head at 7.4 USt.
Combining the two components reduces the number of transport units.
New with these cranes is the Eco mode system. In normal mode, the crane runs on full power. Switching to Eco-mode uses 75% power, and Super Eco mode uses just 50% of the normal power. It allows a crane with a bigger hoist motor to work on less current. That helps on sites with restricted power supply.
Eco and Super Eco modes reduce hoisting speed but lower the hook just as fast as normal mode.
Both new flat-top models are expected to sell in North America, Europe, Australia, Asia, the Middle East, and South America.
In addition to introducing the new flat-top tower cranes, Jaso is in the process of renewing its T-series range of conventional saddle-jib tower cranes.
That type of crane with a cat head is structurally efficient, has light components, and offers a good jib-tip capacity, said Jaso.
Jaso is among relatively few proponents of the low-top tower cranes, which combine the benefits of conventional and flat top designs.
Now demand from customers has been sufficient for Jaso to embark on development of flat top tower cranes.
The company continues the T-series and low-top models alongside the new flat-tops series.
The new flat tops fit in a capacity class around 200 tonne-metres (1,446,601 ft.-lbs.), where 10- and 12-metric-ton (11.1- and 13.2-USt) cranes represent more than 50% of the market.
These new models can cover the market between the city crane and the low top series, typically for light construction with precast concrete modules weighing up to 11.1 or 13.2 USt, or for pouring concrete.
Key features include versatility for multiple applications, optimization for component
weight, plus quick and easy assembly in congested urban areas.
A wide range of performance characteristics are available from micro speed and proportional slewing to high operating speed and minimal power consumption.
