Abstract
The research in the field of historical trusses, carried out at the workplace of authors for a long time, is focused on monitoring and analysing microclimate with the aim of specifying environmental conditions that would be suitable for preservation of a historical structure for further generations. Currently, this investigation is running together with a blanket screening of historical trusses in Slovakia [1 and 2]. In each truss, there was recorded the general technical state as well as the way of ventilation in a roof space. To define the impact of microclimate in a roof space on the lifetime period and sustainability of a historical truss, long-term measurements of features regarding both a roof space and its surroundings are made. The gothic truss over the gothic Roman-Catholic church of the Most Holy Body of Christ was chosen as an experimental truss for this type of analysis because it is very well-preserved.
Highlights
This case study describes the system of measuring characteristics of microclimate relating to the roof space of a historical truss and moisture in timber elements
In respect to the comparison of measured characteristics in particular openings of the truss space, it is possible to define the way of air circulation in this space and subsequently mark the spots wherein there is no airflow
The data differences associated with absolute moisture of timber elements, recorded by actual measurements as well as obtained by calculations, point out presumable effect of ventilating in the truss space on the moisture content in timber
Summary
With the effort of achieving the sustainability of the good technical condition of an involved truss, it is needful to analyse the effect of air humidity on moisture of timber structural elements. The Roman-Catholic church of the Most Holy Body of Christ was built as a stand-alone building, situated from the north to the west, in the middle of a fenced area in the historical centre of the village of Bela-Dulice (see Fig. 1) It probably arose in the first half of the 14th century. The steep truss over the nave has a rafter construction with collar beams, it is longitudinally bound with a central framed trestle (see Fig. 2), and it is dated from 1409d. It has 10 bonds, where 4 are full with 2 intermediate ones among them. 80% of the truss construction preserved its originality up to the present days
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