Safety

MAC – short for MEVA Automatic Climbing – provides complete protection for workers with full cladding surrounding the external hanging platforms. Working space inside the external platforms is generous. No external trailing platforms are required on the MAC. This allows the contractor to follow closely with the slab construction.

Fully automatic hydraulics

The MAC system is supported by jacking and shear key beams inside the shafts. They sit on these beams and lift the whole system in one continuous operation. The MAC’s long-stroke, heavy-duty hydraulic system has a capacity of 20 tons per ram and a non-return ratchet that locks on each cylinder. The beams rest inside pockets set in the walls that were previously cast. Thus, the climbing load is carried by concrete that has already set: one of the system’s most conspicuous benefits in terms of safety and speed.

Adjusting in 3 directions: tolerance of only +/- 3 mm

Inside the MAC system an intermediary platform gives access to the 3-way adjustment devices. The latter gives the MAC system an extreme accuracy of +/- 3 mm. It also allows the system to be quickly plumbed and speeds up the stripping and setting-up process. The top of the ram rests against the beams of the main grid. 

Shutters or panlised formwork systems

When a panel system is used such as the hand-set AluFix formwork panels or the heavy duty Mammut 350 system, the suspension connects directly to the main grid covering the whole system. Alternatively, MAC successfully works with shutters made from aluminium beams and plywood facing. 

Shutters moved by hand, without force and without special tools

During steel fixing the external panels or shutters are retracted by hand and give access to the core structure. An intermediary working platform set up at mid-height allows for safe fixing. Another key feature of the MAC system is the possibility of using drop panels for confined spaces where retraction is not practical.

Top platform free from obstructions

Since the jacking points for the rams are located under the main grid, the top platform of the MAC is free from jacking masts and other mechanical obstacles. This provides ample working space for concreters. The platform can also be used to store craned materials such as rebars. Open voids are minimized on the top platform while concreting chutes ensure that concrete is not spilled inside the system. Placing booms can also be integrated into the MAC system.