In this article the authors present a monumental rafter framing of a baroque church in Nowy Kościół Lower-Silesia, Poland. The rafter framing was built in the 18th century and it was repaired in the middle of the 19th century by adding some new structural elements. The authors have analyzed the original construction and the reinforced construction from the 19th century and they found some large destruction of particular elements. In the presented example, the rafter framing required immediate renovation at the time, on account of its very bad technical state. This bad condition resulted from the damage of structural elements during ineffective attempts of repair, which were made in the middle of the 19th century, and due to a natural ageing process and the destruction of materials. The authors of article suggest renovation of the structural elements by adding in new supporting elements to strength them, which will force modification of reinforced elements work. The authors suggest renovation in such a form, that the monumental character of rafter framing would be preserved.
In this article, the authors presented two examples of the reconstruction of medieval masonry ramparts in Nowogrodziec and Gryfów Śląski (Lower-Silesia, Poland). The authors elaborated a schedule for the reinforcement and the reconstruction of permanent medieval monastery ruins in Nowogrodziec and a way to reinforce the medieval city walls in Gryfów. [1, 2]. The authors have also proposed the reinforcement by using "Reticolatus" system. The "Reticolatus" system, developed in Italy for strengthening 3-layer walls against seismic influence, could be used separately or in addition to other techniques of reinforcement, especially in irregular masonry structures. The proposed technique allows for increasing compressive and shear strength. This method also allows for using the original material of the building with preservation and protection of historical, monumental and architectural character of the reinforcement construction.
In the case of historic buildings, especially those under protection, it is important to replace elements of the roof covering, while maintaining current technical standards, to meet the requirements of the conservator. The authors of the article present alternatives to commonly used solutions, based on their experience with replacing historic building roofing with ceramic tiles made according to the production and firing technology of the nineteenth century. They emphasize that the correct/specialized restoration of existing tiles in a building makes it possible to preserve and reuse them, which is in line with the principles of historic preservation. However, due to the preservation of the roof tiles, it is not always possible to revitalize them. As a solution to the problem, the use of clay roof tiles manufactured according to 19th-century firing technology, including handmade methods, is presented, which preserves the geometry of the historic roof tiles. The approach presented by the authors meets both the requirements of conservation theory and the building standards for roofing elements. Although it is much more expensive than the solutions currently commonly used that result from modern technical requirements and tile-manufacturing technology, in the case of objects of significant cultural heritage, it is a solution that meets modern technical requirements while not compromising the original appearance of the monument.
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