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Star crack 2 1 0 3 Blistering 0 0 0 1 Bursting 1 0 0 0 Splintering 23 11 0 0 Chipping 8 8 3 8 Spalling 0 0 0 2 Differential erosion 0 0 0 3 Rounding 98 20 59 64 Impact damage 0 0 0 1 Cut 5 0 0 1 Scratch 0 0 1 1 Missing part 22 (18) 30 (19) 21 (4) 52 (4) Gap 1 (12) 0 0 0 Perforation 3 (35) 4 (18) 7 (20) 2 (20) Perforation with plastic 7 1 0 2 Pitting 0 0 0 4 Metallic insert 55 (2) 10 (4) 42 (14) 44 (12) Strange Element 3 12 27 31 Dust Deposit 4 0 0 0 Paint 97 43 130 94 Stick 42 15 73 92 Cement 8 2 18 14 Grease 22 21 7 0 Pigeon Dropping 5 6 8 72 Bleaching 0 0 0 2 Oxide staining 18 0 32 49 Film 10 0 0 0 Graffiti 11 1 4 0 Patina 14 9 19 28 Soiling 6 21 74 103 Spider net 1 2 2 4 Pieces analysed 153 67 171 218

      The five deterioration families of this framework are present in Palacio Salvo (Tables 4 and 5). The Family Crack and Deformation is represented mainly by cracks and star cracks (Figure 3). Cracks occur very seldom in pilasters and columns, and only one is present in a step (Tables 4 and 5).

      Splintering is the most frequent deterioration feature of the Family Detachment observed in Andes Street and 18 de Julio Avenue, followed by Chipping, which affects pilasters and columns of the four areas studied (Figure 4). Due to the location and characteristics of the latter features, they are a product of differential movement of the structure or the masonry, and not originated from low resistance of the rock. They are absent in steps.

      Fragmentation is only observed in two panels of the Gallery. Blistering and spalling are related with features of other families and will be discussed at the end of the section.

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