INSTALLATION
1. The entire surface of the slab to be cast on site is shuttered with wood deck (or similar systems), then the welded reinforcement irons and mesh are positioned according to the design and the spacing lattice for the upper reinforcement is arranged.
2. The U-Bahn Beton® formworks are positioned with the desired centre distance that will determine the width of the beams. Thanks to the conic elevator foot, the U-Bahn Beton® formworks will be lifted from the surface, making it possible for the lower slab to be formed.
The systems will be arranged in the internal cavities of the formworks.
3. The positioning is completed by closing the open final ends of the U-Bahn Beton® formwork with a lateral closing plug above which the reinforcements, welded mesh as well as the instruments for cutting and punching are positioned according to the design.
4. The concrete casting must be performed in two phases to prevent the floatation of the formworks: an initial layer will be cast to form a thickness equal to the height of the elevator foot. Casting will continue for this first portion of the slab until the concrete starts to set and become less fluid.
5 . Once suitably set, the casting can be restarted from the starting point, completely burying the U-Bahn Beton®. The casting is then levelled and smoothed in a traditional manner.
6. Once the structure has hardened, the formwork can be removed. The surface is smooth in correspondence of the soffit.