TOWER CRANES Ӏ LUFFING JIBS
City snapshot: Tower cranes in Toronto
Toronto, Canada is a hot bed of construction at present. The image on the left shows Canadian construction company Verdi Alliance’s fi rst Moritsch Cranes’ RTL285B on a job site in the city, while the image on the right shows Canadian builder Avenue Building Corporation using Raimondi LR273 luffi ng cranes on the high profi le Nobu Residences in downtown Toronto. The company says it selected that model due to its out of service boom angle.
Saez, in Spain, offers both
A WOLFF 355 B erected on a 3 m tower at the recent Vertikal Days trade show in the UK. Wolffkran’s WOLFF 355 B has been in production since 2007 and the company says it is still one of its most popular cranes.
hydraulic and rope luffers. While the hydraulics are great for very tight out-of-service radii, and can work close to buildings with minimal backswing, it is rope luffers that offer the real power. And Saez’s R&D department has been working intently on competing at the highest level in the class. A 1450t/m class crane is on the drawing boards: if and when it is launched, it looks likely to rival some of the truly massive luffers, pioneered by the likes of Favelle Favco and the TG range, once built by Link-Belt. These are the sorts of cranes you use to build a nuclear power plant or a continent- connecting bridge, as Favelle Australia-based international hirers
48 CRANES TODAY
Marr has been doing in the UK and Turkey. But these are rare and specialist jobs. With the Saez SL 730, the Murcian manufacturer hits a significant milestone, putting it in contention with world-leading rivals like Wolffkran and Liebherr. In its standard version, with a 123kW hoist motor, it can lift 36t. With the added power of an optional 140kW motor, it can raise as much as 50t. The crane features a 70m jib,
5m more than that offered on Liebherr’s comparable model. With this lowered to its full extension, the crane can lift more than 6t. The crane features a high strength slewing mechanism, with the pivot point for the luffer centred above the mast,
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