In 2009, the bolt connecting the metal tie-beam to the timber rafter of one of the 11 composite Polonceau trusses mounted in the main body of the Senatorial Palace in Campidoglio square – now the town hall of Rome – unexpectedly broke. The need to repair the great roof – which lies directly above Julius Caesar’s Hall – gave rise to a study which was to prepare the way for a project. This paper presents the results of the preliminary fact-finding analysis of that project. The analysis particularly focused on the nineteenth-century alterations that were made to the great vaulted ceiling of Julius Caesar’s Hall and the double-pitched timber roof above. These alterations date back to June 1893, when the collapse of portions of plaster from the intrados of the hall’s barrel vault triggered a process that – on the construction site set up to replace the great masonry vault with a metal one of the same shape – would lead to the decision to dismantle the sixteenth-century timber trusses as well, replacing them with composite Polonceau trusses. The comparison between archive data – particularly the visuals documenting the late nineteenth-century project – and the current situation, surveyed on site, allowed us to identify with enormous precision the substitutions that were carried out on the main structures – the vault and the roof – as well as associated work undertaken on masonry in order to create the structures that would support the new additions.

La copertura dell’aula Giulio Cesare nel Palazzo Senatorio in Campidoglio. Note sul cantiere di fine Ottocento

CAROCCI, CATERINA;
2017-01-01

Abstract

In 2009, the bolt connecting the metal tie-beam to the timber rafter of one of the 11 composite Polonceau trusses mounted in the main body of the Senatorial Palace in Campidoglio square – now the town hall of Rome – unexpectedly broke. The need to repair the great roof – which lies directly above Julius Caesar’s Hall – gave rise to a study which was to prepare the way for a project. This paper presents the results of the preliminary fact-finding analysis of that project. The analysis particularly focused on the nineteenth-century alterations that were made to the great vaulted ceiling of Julius Caesar’s Hall and the double-pitched timber roof above. These alterations date back to June 1893, when the collapse of portions of plaster from the intrados of the hall’s barrel vault triggered a process that – on the construction site set up to replace the great masonry vault with a metal one of the same shape – would lead to the decision to dismantle the sixteenth-century timber trusses as well, replacing them with composite Polonceau trusses. The comparison between archive data – particularly the visuals documenting the late nineteenth-century project – and the current situation, surveyed on site, allowed us to identify with enormous precision the substitutions that were carried out on the main structures – the vault and the roof – as well as associated work undertaken on masonry in order to create the structures that would support the new additions.
2017
9788871407647
Palazzo Senatorio, Campidoglio, Della Porta, capriate Polonceau, restauro
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/95518
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