PSI - Issue 78

Roberta Di Chicco et al. / Procedia Structural Integrity 78 (2026) 497–504

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• Row-type aggregates, consisting of building units arranged linearly along the street front, forming elongated rectangular blocks. This pattern is widespread in the second expansion area (depicted in yellow in Figure 1b). In this case, a further classification can be made based on L , the longitudinal length (in meters) of the aggregate (and thus the number of adjacent structural units): L ≥ 50m which represents the majority and L<50m. Two masonry types have been identified: irregular masonry made of local rough stone with disordered texture, and regular masonry composed of squared stone or yellow Apulian tuff blocks (the same which is found in the C02 sector). Some of the collected data about the building stock is presented in Figure 2.

Fig. 2. Statistical elaboration of the main features of the buildings within the historical centre.

Moreover, buildings with irregular masonry are generally characterised by a high percentage in poor condition, an average of two storeys, wooden or iron floors at intermediate levels, in several cases cross vaults at ground floors, frequent absence of plaster, and height irregularities. In contrast, buildings with regular masonry typically have three storeys, floors made of iron beams or reinforced concrete and are generally in good condition. Some of the surveyed buildings are presented in Figure 3.

Fig. 3. Some buildings surveyed within the historical centre.