Restoration of the Hotel Angst

As a result of the investigations, the structural framework was found to consist of load-bearing masonry, highly uneven in size and materials, evidencing construction that occurred in several phases, and severely degraded, with missing, demolition marks, mortar deficiency, cracks and fissures.
The partly wood-framed and partly brick-vaulted insulators on steel profiles showed a generalized state of deterioration characterized by missing beams, rotting of wooden elements exposed to weather actions, deformed beams, and planking collapse.
Seismic upgrading was then planned in compliance with current technical regulations, through structural works to consolidate existing masonry, new floors, new extension structures made of metal carpentry, and foundation reinforcement with reinforced concrete subfloors.
The new floors, consisting of steel beams, trapezoidal sheet metal, and concrete collaborating slab, reinforced with electro-welded mesh, make it possible to contain the loads on the foundations and weld the vertical structures, ensuring optimal distribution of horizontal actions and box-like behavior of the building while improving its seismic response.
For the masonry, consolidation was planned with execution of double layer of plaster reinforced with fiberglass mesh and steel bars embedded in the masonry to bind the layers of plaster coating laid by spraying. Where necessary, it was decided to proceed with the reconstruction of the resistant sections using the "scuci-cuci" technique.
Punctual injections of binder mixtures were also provided to improve the mechanical performance of the walls by eliminating cracks and cavities and strengthening the bonds between the components of the masonry itself.