1. All kinds of cranes have the advantage

2. Longfellow Bridge: “Salt and Pepper” Towers Work More than 100 years after the last stone was set on the “salt and pepper” towers of the Longfellow Bridge, will begin dismantling the towers for storage, cleaning, and repair as part of the Longfellow Bridge Rehabilitation Project. The work is anticipated to begin later this week, and is weather dependent. The tower dismantling work will take place using a barge-mounted crane on the Charles River. On Thursday, March 6, its contractor, will begin preparations by moving into place the small gantry crane via barge from the staging area in Charlestown to the upstream side of the bridge. An ice- breaker will precede the barge to provide an unobstructed path. Once the crane is in position at the Cambridge tower the granite stones will be removed and loaded on a barge. The stones will be taken to the contractor’s staging area for cleaning, storage, and repair.small gantry crane The towers will be dismantled to sidewalk level only. All remaining pier granite below the sidewalk will be restored in place. During stone removal, waterway access will be partially restricted through span 7 immediately adjacent to the tower. Booms and lighting will be deployed in accordance with US Coast Guard requirements for boater safety. Along with the tower granite removal, the contractor will demolish a concrete liner to expose the inner face of the tower stonework. The concrete demolition work will take place from staging set within the towers and will not be visible to pedestrians from street level. Once the Cambridge-side tower is dismantled, the contractor will start work on the adjacent upstream Boston tower, Pier 5. The two downstream towers will be dismantled and restored when that side of the bridge is rehabilitated during the final phase of construction, which is planned to begin in fall 2015. As conditions dictate, the uppermost stones comprising the tower roof may need to be removed using a mobile crane 250 ton situated on the bridge deck. In this case, the work will be done at night, during MBTA Red Line non-service hours.mobile crane 250 ton The contractor plans to rebuild the iconic towers after seismic reinforcement construction is completed within the bridge tower piers. The fully restored upstream “salt and pepper” tower stonework is planned to be reassembled on the bridge later this year.

3. Release Wolff 5014 City in Bern Has launched a new city crane, the Wolff 5014 City. The manufacturer said the new model was the strongest crane in its class. The unit was presented to the public at the Construction Equipment Exhibition in Bern. said that compact cranes were in high demand at inner-city construction sites. The firm believed that in order to be successful these types of cranes needed to be both powerful and easy to assemble. The engineers from 's facility in Heilbronn focused their latest development on this demographic and in doing so further extended their range of small trolley jib cranes with the flat top Wolff 5014 City.jib cranes The new crane has a tip load capacity of 1.4t at a 50m radius and a maximum lifting capacity of 6t. The unit uses a frequency-controlled 28 kW hoisting winch. This winch is positioned on the first jib section, the entire jib, including the reeving of all ropes, with the intention of ensuring that the crane can be easily and safely assembled on the ground. An additional feature allows the machine to be preassembled with the bolted-on counterjib, providing that there is sufficient space at the site. At more confined construction sites, the jib can also be assembled in the air. The jib can be extended in 2.5m intervals between 25m and 50m. The 5014 City can be erected up to a hook height of 43.5m and is compatible with TFS 15 tower sections. Its design as a 2-rope fall crane means it is not necessary to re-reeve the hoist line when changing over from a 2-fall to a 4-fall operation. The manufacturer added that the hoisting winch design had greater storage and a revised geometry of the drum meaning that it could have a hook path of up to 190m. Depending on the requirements at the construction site, the WOLFF 5014 City can be operated with or without a cabin. A full range radio remote control with a digital display provides the load data of the ladle crane and transmits the wind speeds, hook height, rotation angle and error messages at all times.ladle crane