Camargo Correa acquires crane size tailored by Locabens
to enable an infrastructure project in the State of Amazonas.
Cable-stayed bridges are structures that are more and more common in Brazilian landscapes, mainly due to the access to new engineering techniques and to cutting edge materials and equipment, acquired or rented by industry key players. In the north of Brazil, the work being developed over the Negro river put together a set of state-of-the-art technologies to create a permanent link between the capital of the state of Amazonas and the cities on the right bank of the river, linked to each other by state road AM070.
Including the onramps at the entry and exit spots, in Manaus and Iranduba, the Negro river project will be 2.1 mile long and 68 foot wide (four lanes). It will have 73 clearances, with an average distance of 147 feet between columns. In the cable-stayed section, the navigation area will have two clearances that are at least 656 foot wide and 180 foot high, allowing the sailing of large size vessels under such section, even when the river is in its high tide.
To build the central section - 0.25 mile meter long and supported by 104 steel cables - and the main column - which will be 1312 foot high and the first diamond shaped one built in Brazil - the Rio Negro joint venture, comprised of contractors Camargo Corrêa and Construbase, requested the technical support of Locabens, a company specialized in deploying and operating cranes to move loads in highly complex projects. And the companys technical department, after assessing the projects peculiarities, developed a special project that included the selling of a crane Potain MC 235B, equipped with a 213 foot long jib and a 10 t max capacity, specially adapted to be used in the project.
Since the construction site is on the bottom of the Negro river, we have designed special anchors for the crane tower that are compatible with a max telescoping height of 525 feet and are implemented with connection system based only on 3 spots," says Marco Carminatti, Locabens commercial manager. We chose a Potain crane because it was the one that met the project's needs the best, due to how dynamic working with it can be, its low power consumption, and the operational advantages offered by the set of technologies found in the cranes produced by that brand. Another important unique feature was the technical support offered by Locabens team, from implementation project and operations start up to the ongoing post-sales follow up, which was critical to add this major project to the list of works that have enlisted the aid of Locabens team and Potain cranes, states Carminatti.
When inaugurated, the new bridge will enable land transportation between Manaus and three important cities in the area: Iranduba, Novo Airao, and Manacapuru. The projects location was set to offer an inclination lower than 3º on both onramps, which will allow access to cars and heavy vehicles of any size and simplify cargo transportation (which currently uses ferries).
The recommendation included the use of a high performance crane developed by Potain for application in urban areas. The lifting deployment, alongside the 98.5 foot long jib (98.5 ft x 2.5 t loading specter - perfect for the specific type of load of the project) offered the best ratio between lifting speed and schedule set for the project.