PSI - Issue 11

Giorgio Frunzio et al. / Procedia Structural Integrity 11 (2018) 153–160 Prof. Ing. Giorgio Frunzio, Ing. Luciana Di Gennaro 00 (2018) 000–000

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technical standards for buildings" issued by the Ministry of Cultural Heritage. This in order to carry out interventions mainly aimed at conservation, but at the same time compatible with the function of the building linked to the needs of the local administrations. The structural improvement intervention consisted mainly in the realization of a stiffening in its own plan of the ancient wooden deckings. To this end, in addition to the complete replacement of the few damaged beams, a double timber crossed plank was created above the primary frame, also with solid chestnut wood elements, firmly connected to the beams through stainless cylindrical shank pins, suitably sized. Where possible, the panconcelle were not removed from their seat to preserve the original intrados view of the floors.

2. Material Characterization Through on site tests and laboratory analysis

Having to proceed with the consolidation of ancient wooden deckings, it was essential to verify the state of conservation of the principal and secondary wooden elements. To this end, after a careful visual analysis, the TecnoLab Authorized Laboratory of Naples, has been commissioned to carry out a series of on-site surveys consisting in sclerometric tests, according to UNI 408: 1997 Standards, and ultrasonic tests, according to UNI 12504- 4. We also proceeded to the direct determination of the compressive strength, measured in the laboratory on

some elements coming from the last floor level which was object of previous interventions. The abstracts of the aforementioned test reports are reported below (Fig. 2,3 and 4).

Fig. 2 – Sclerometric test report - UNI EN 408:1997

Fig. 3 – Compressive strenght test report

Fig. 4 – Ultasonic test report - UNI EN 12504-4