National Repository of Grey Literature 27 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
What wood for wood buildings?
Beránková, Jitka
Cracked beams, beetles flying out of the roof trusses, rot and mold, twisted wooden planks, and other nightmares of wooden buildings users can only become a reality if no known binding wood requirements for the wooden construction. Several principles and important information on the required wood properties are brought to you by the Timber Institute in Prague.
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Inspections and maintenance of wooden trusses
Součková, Anna ; Novotný, Václav
All about wooden roof trusses (not just the historical ones) in terms of maintenance, protection and control.
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Stavebně-technický průzkum krovové konstrukce kostela sv. Františka Serafínského v Lipníku nad Bečvou
Hašová, Jiřina
The subject of this thesis was to make a constructive-technical research on timbers of St. Francis Seraph church in Lipník nad Bečvou. This church is registered into national list of sights as a sight number 29870/8-485. It is a Gothic-Renaissance building dating from 1590-1593. The roof above the cancel and nave consists of free floors dollar beams, queen post and truss frames. The aim was to reveal biotic damage to individual elements of timbers and to determine the extent of the damage. The evaluation of timbers was based on sensory and devices research. The roof was attacked mostly house longhorn beetle, rotting, especially in places where there was high humidity. The damage was caused mainly on wall beams and camping piece of tie beams. Based on achieved results we suggested remedial measures which are intended to preserve the built of wood, which is in a satisfactory condition. This thesis also deals with dendrochronological dating where we tried to determine the age of construction by dendrochronological analysis. The roof above the nave and chancel was dated to the period 1769-1771. Thesis is completed with anatomical determination of forest species which were used in individual parts of timbers. The results provide information for planned reconstruction of monument considering its current constructive - technical condition.
Diagnostics and quality of timber buildings
Beránková, Jitka
Diagnostics of buildings, control of their quality and correctness by means of diagnostic apparatus and methods.
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The impact of physical methods and new chemical preparations based on nanoparticles on selected wood-rotting fungi invading wooden structures - possibilities and limitations of modern techniques of prevention
Švec, Karel ; Gabriel, Jiří (advisor) ; Ptáček, Petr (referee)
83 Abstract The work focuses on the physiology of wood-rotting fungi and the possibilities of their inhibition by physical methods (microwave and gamma irradiations, dry heat) or newly developed chemical preparatives contaning metallic nanoparticles. The effect of abovementioned treatments on mycelial growth, activities of extracellular enzymes responsible for wood degradation and on spore germination or viability was studied in selected strains of wood-rotting fungi obtained from culture collection (Coniophora puteana, Fibroporia vaillantii, Gloeophyllum sepiarium) or isolated from infected buildings (Serpula lacrymans).
Decaying fungi on selected sites in protected landscape area Karlštejn
Tesárková, Monika ; Pešková, Vítězslava (advisor) ; Čížková, Dana (referee)
The thesis aims to evaluate the state of health of tree species growing in Karlštejn National Nature Reserve, with the main focus on ligniperdous fungi found in this location. Data were gathered in two experimental sites near Hostím and Bubovice villages, situated in the protected landscape area of Bohemian Karst (Český Kras). Tree species were inventoried in both designated sites and list of individual species of wood decaying fungi was put together. Furthermore, the state of health of tree species was evaluated according to crown defoliation and abiotic damage. The thesis also briefly describes the history of Bohemian Karst Protected Landscape Area and other related themes climatic and soil conditions, including geological and geomorphological characteristics of this region that significantly influence the natural character of the territory, including occurrence of ligniperdous fungi. The examination and subsequent controls of the selected sites took place once a month in period lasting from April 2015 to November 2016, revealed that only common species of wood decay fungi are found in the area of Karlštejn National Nature Reserve, which is part of Bohemian Karst Protected Landscape Area. These fungi are commonly present in the territory of the Czech Republic, therefore no unusual or new species of wood rotting fungi were found. The Korovitka (Diatrype) is the most widespread decaying fungi in both experimental plots, but the only one found fungal patogen Sphaeropsis sapinea, which in recent years has spread further and causes death and drying of pine trees has an economic importance for this area. Due to the good health of trees were found no major differences in the defoliation of trees, up to the aforementioned black pine attacked by fungi Sphaeropsis sapinea. There was observed defoliation from 45 to 100 %. There was no significant damage abiotic species found in the areas under examination.
Health condition of of trees in natural monument Buky on Bouřňák
Wiedenová, Barbora ; Čížková, Dana (advisor) ; Vachová, Jana (referee)
In the thesis I focused on observing the occurrence of wood-decaying fungi on tree species in natural monument Buky na Bouřňáku. Two areas of 100 x 100 m were mapped, each contained hundred trees of various kind, mostly beech (Fagus sylvatica). The introduction summarizes information about the location and describes occurring pathogenic fungi and their expanding, biotic and abiotic damage and state of beech crowns. Observation was conducted from April to November, starting with the precise inventory of trees and their marking. Each subsequent month, I observed changes on specific tree species, recorded them and photgraphed detected fungal specimens. Individual species of wood-decaying fungi are described in my thesis. In the field, apart from fungi, I also observed the consequence of biotic factors that were evident on trunks, branches or assimilation organs. For individual species of beech, I recorded the condition of trees based on defoliation of the crown. The most frequently occurring wood-decaying fungi in the whole natural monument was Stereum rugosum. This fungi continues to spread and causes decline of several beech trees. Nevertheless I think the beech forest should be left to its spontaneous development, because it is a small protected area, more correctly natural monument.
Wood decaying fungi in the natural forest in the southern part of Brdy.
Šourková, Zuzana ; Čížková, Dana (advisor) ; Pešková, Vítězslava (referee)
The aim of my work was to determine the species diversity and frequency of wood decaying fungi in selected areas of natural forest in the southern part of Brd around Třemšín. The site I chose four different areas, where I was looking decaying fungi in the period from April to November. Further I describe the system of distribution mushrooms, splitting wood destroying fungi, concept tree disease, the importance of fungi in nature, spread of fungi. Described was also monitored site. Finally, work has formed an overview of wood decaying fungi found on those areas with their frequency of occurrence. Total found 39 kinds of wood decaying fungi from different families. Found wood decaying fungi were photographed and then described.
Problems with pathogenic fungi in the park Stromovka
Kubištová, Pavla ; Čížková, Dana (advisor) ; Šrůtka, Petr (referee)
The thesis describes characteristics of the study area, Královská obora, where the investigation was carried out in the field. It also engages in the description of the studied trees, wood-decaying fungi and damage of trees that occurs and causes problems here, in Stromovka, especially in the most visited areas of the park. Various injuries are a common cause of infection of pathogenic fungi that threatens a stability of trees and hence a safety of the park visitors. Health assessment conducted in location in the park Stromovka, which are problematic due to the occurrence of wood-decaying fungi. The locations were placed at the Planetarium, for the track and along the track. It was focused on the occurrence Meripilus giganteus on beeches, whom they are in the park problems with, particularly on heavily visited sites. 663 trees were inspected in total. The statistical analysis showed that most of the damages of trees in the park Stromovka was dry branches (12 % of the total trees ), probably it was as a result of above-average temperatures in 2015. Only 3 % of the total number of inspected trees were infected by wood decaying fungi. Most of the trees were infected by Inonotus cuticularis (23 % of the total number of found wood-destroying fungi). Meripilus giganteus caused 14 % of the total number of found wood-destroying fungi dameges on the trees in the area. The infestation by pathogenic fungi was not significant on the inspected trees, it could be caused by above average temperatures and below-average rainfall in 2015. At the same time their presence was influent by a felling of trees in studied area from November 2014 to the end of March 2015. It was decided on the basis of dendrological research, that the identified riskiest trees infested by fungi and dying trees with disrupted stabilitye.
The reconstruction design of timber structures of the existing building
Bartlová, Jana ; Šmak, Milan (referee) ; Straka, Bohumil (advisor)
The content of this work was to carry out construction-technical survey of timber structures of the existing building in order to design an appropriate procedure for their reconstruction. The survey showed construction in an unsatisfactory to disrepair, so further work also includes the static calculation of new structures proposed instead of the current. Timber structure in the building has form of staircase, roof and ceiling construction. Newly designed the following types of stairs and roof trusses from which the lower belts are used as ceiling beams. The new proposal also includes possible roofing, roofing options, developed one of them. The work also includes drawings, bill of materials and cost estimate staircase structure and truss. Specialization in the field of civil engineering is represented by drawings of the new truss and passport (view of current state) whole object on parcel ST.74 / 1, land Tišnov (okr.Brno-venkov), the content of which was the basis for this work.

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