World record with cleanroom cranes

Synchronization Test

Assembly

Assembly

Latest test

Synchronization test

In a challenging project, ALTMANN, as a global technology leader in the development and manufacturing of cleanroom cranes, succeeded in commissioning the world's largest cleanroom cranes.

With a span of 30 m and a total load capacity of 30 t each for ISO 7 cleanroom class according to ISO 14644-1, these cranes rank at the top of the global list.

And that's not all; several challenges had to be overcome beforehand.

Due to the construction situation on site, it was impossible to deliver and assemble the 30 m long crane bridges in one piece. Therefore, the cleanroom crane bridge girders, with a cross-section of 1,600 mm height and 625 mm width, were manufactured in three segments. The three segments were connected on site using bolted joints to form a complete bridge girder. Due to this requirement and for static reasons, the head truss of the cleanroom crane was also divided and delivered in a so-called boogie design. This allowed the two crane bridges to be lifted individually onto the crane runway and assembled into a double-girder bridge crane using a coupling rod.

ALTMANN countered the deflection caused by self-weight by cambering the bridge girder segments. This means that the box girders were welded with an overhang that balances out after assembly due to the self-weight.

During the load test with overload, only a deflection significantly better than one thousandth of the span was measured. The load and synchronization test was successfully passed.

The optimal utilization of the available room height was a key customer requirement from the beginning and was implemented excellently.

The ALTMANN installation team handled the challenges arising during installation with excellent skill.

The 30 t total load capacity is achieved with two electric hoists that can be operated individually and synchronously. The accuracy in synchronized operation is +/- 1 mm.

Two identical cleanroom cranes of the double-girder bridge crane type were delivered, assembled, and put into operation.

Not only can the two electric hoists on a single crane be operated synchronously. Both cranes, with a total of four electric hoists, can be operated in sync, achieving millimeter-precise synchronization in each axis (crane travel, trolley travel, and lifting/lowering). This allows for safe handling of loads up to 60 t.

The scope is rounded off with a walkway on one of the two bridge girders for easy access to important components such as control, cleanroom hoist, drives, and head truss. A load display for each hoist is also installed, enabling operators to monitor the load with high accuracy.

An interface in the radio remote control with operational options allows the operating and maintenance personnel to read out not only the current load but also the status of the crane system. This provides maintenance personnel with an excellent tool to target and resolve any malfunctions efficiently.