It is an existing reinforced concrete hospital in Elefsina, Attica, consisting of an underground level, a ground floor and a first floor.

It was necessary to upgrade the load-bearing structure of the building, namely the slabs, due to a significant increase of the live load on the roof and the ground floor.

Different methods were used for this purpose, depending on the geometry and the position of intervention.

In the large-span slabs reinforcement was added on the lower side, by means of carbon laminates, placed in both directions.

Ιn other cases, steel-composite columns were added, each one featuring a cone-head for the uniform support of the slab.

In addition, new steel-construction walls were added to create a new linear support for the slab.

Where the slabs were supported directly on columns, their resistance against punching increased through the addition of steel-capitals or consoles.

Furthermore, the load-bearing capacity of the inverted reinforced-concrete beams that support the slabs of the terrace, increased by converting these beams into steel-composite ones.

For this conversion structural steel profiles, suitably positioned and anchored, were added to work perfectly – in a force-assuming manner – with the reinforced-concrete beams.

The results were very satisfactory because the goal was achieved quickly, economically and without any alteration of the building’s architectural design.