The 3,200-ft-long Monongahela River Bridge, which is currently being constructed on the Mon-Fayette Expressway near Brownsville, Pa., consists of seven spans including a 518-ft main span. Built using balanced cantilever segmental construction, the bridge features two active rail lines and local roads. Cast-in-place concrete is being used to form the 89-ft-wide, dual-cell box girders where unique C-shaped piers reach over 200 ft tall. The bridge includes over 9 million lb of reinforcing steel, 3,300 linear ft of drilled shafts, 51,000 cu yd of concrete and 3 million lb of post-tensioning.
Walsh, the prime contractor on the job, prides itself on safety and knows that machines like the JLG 1350SJP Ultra Boom can make the workplace safer because of its many capabilities including a 135-ft platform height and 80-ft horizontal reach. They may not always need the full working height on every job, but when ground level obstacles, or snow and ice during winter months, builds up around bridge piers, they can position the machines as close as possible to the piers, then rely on the extended reach to get them up to the overhead work.
In addition to a huge working envelope, JLG 1350SJP Ultra Booms also feature a self-contained generator mounted in the boom base that uses the boom lift’s engine to generate 7,500 watts (up to 10,500 watts peak) power. A power cable from the generator is routed inside the boom from the base to outlets on the platform. This allows workers to operate power tools and a variety of “Workstation in the Sky” accessories including a SkyWelder package. The SkyWelder option consists of a 280-amp Miller welder tucked neatly in the platform that allows operators to perform stick and TIG welding operations from the platform without the need for additional equipment like a stand-alone welder and generator. It also increases jobsite safety as it eliminates the cables hanging down from the platform and lying on the ground.
The JLG 1350SJP boom lifts have proven to be extremely valuable machines for Walsh, and that is why they own both of the machines used on the Monongahela River Bridge project. With the large number of projects going on at any given time, by owning the machines, Walsh is able to move them around the country to jobsites wherever they are needed and is assured that their workers are using the most versatile machines available for any job.