The Hulk (Liebherr LTM 1300-6.3) used 146 feet of main boom at a 60-foot lift radius and had 195,000 pounds of counterweight.
The Blue Beast was configured with the luffing jib because it provides a capacity boost needed to single-pick the center span. “Although luffing jibs are typically used for ‘up and out’ lifting purposes like you often see in urban construction, like setting a large air conditioner on top of a skyscraper, we’ve discovered, with these larger Liebherr ATs, that going with a short luffing jib dramatically increases lift capacity,” said Brian Meek, equipment specialist with ALL. “In this instance, at a 135-foot radius, with the luffing jib, our capacity was 93,000 pounds. Without it, it would have been only 73,000 pounds.”
This solution won’t work for all job sites, because sometimes space limitations won’t allow for the extra room needed to build the boom. “You do need a straight laydown area to build the jib,” said Meek. “So you can’t use it on every bridge, but it is a nice option to have for the right circumstances.”
This was the first bridge job for the Hulk. “This is a highly versatile crane,” said Meek. “It has a 295-foot main boom and four jib options. The day before this lift, it was outfitted with full boom and full jib for some ‘up and out’ work, so it has that reach but also has an excellent chart close-up.”
The three-axle dolly for its boom also comes in handy. “Often in this 300-ton weight class of cranes, the boom has to be removed,” added Meek. “But here we can pull up to the job site, start stacking counterweight, and get right to work.”
Meek gives the team at A.P. O’Horo credit for coming up with the creative usage of both cranes. “In addition to the fast schedule, it was a tight job site with obstructions on one side and a ravine on the other side. Planning was key. And using a larger crane to single-pick the first and middle sections, and a smaller AT to handle the third span, was absolutely the right call for this situation.”
About ALL
The ALL Family of Companies is the largest privately held crane rental and sales operation in North America, operating under the ALL, ALT, Central, Dawes, and Jeffers names. For a rental quote: 800-232-4100 or www.allcrane.com.