Cosben launches the new TA1814 telescopic arm for excavators. Essential for rapid and deep excavations in the top-down technique

Cosben launches the TA1814. A new model of telescopic arm dedicated to top-down construction. This arm belongs to the TA series, a range of specific equipment Cosben is developing for several years. It represents a particular type of arm which becomes essential for all those jobs requiring rapid and deep excavation such as foundations or drains. It is a suitable equipment also for working in combination with clamshell buckets. The design of the telescopic arm was developed to minimize any possible breakage resulting from external con-tact such as walls. The hydraulic cylinders of the telescopic section are inside the arm itself. Different versions and lengths are available along with a wide range of clamshell buckets in order to meet all operational needs.

Perfect for top-down

The Cosben TA telescopic arm is particularly suitable for a well-defined construction technique called top-down (literally from top to bottom) and which consists of building by going down. An operation which pro-ceeds in the opposite way if compared to traditional bottom-up procedure. It involves an excavator equipped with an arm capable of operating below the level of its support surface. With this technique the underground floors are created step by step as the excavation is completed. Specifically underground islands serve as a sealing system for the perimeter walls of the excavation. The pro-gressive casting of the floors allows to proceed with the construction. The diaphragms allow the soil sur-rounding the excavation to be contained preventing its settlements and giving the possibility to monitor the surrounding water table. Furthermore they constitute the external walls of a large concrete box in which the actual structure of the un-derground work will then be built. The top-down technique is often used for deep excavation projects in urban areas. Typical underground constructions built with the top-down technique are: underground stations, tun-nels and underground garages.

Cosben's TA series

The TA series telescopic arm is suitable for working with clamshell buckets and essential for work that requires excavations for foundations and drains. The design of the telescopic arm has been developed to minimize any possible breakage resulting from external contact such as walls. The hydraulic cylinders of the telescopic sec-tion are inside the arm itself. Different versions and lengths are available (working from 18 to 35 meters of height) together with a wide range of clamshell buckets to meet all operational needs.

At bauma 2022 the new TA1814 arm

The new telescopic arm model TA1814 was presented during the last edition of bauma 2022. This telescopic arm is designed specifically for excavators from 14 to 18 tons. A 0.35 m3 clamshell bucket can be mounted in front and productivity is approximately 40/50 tons per hour.