Stavební partner
číslo 1, rok 2016, ročník V, řada stavební
článek č. 02
Kristýna VAVRUSOVA
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, Libor ZIDEK
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SEMI DESTRUCTIVE METHODS FOR TIMBER STRUCTURES QUALITY ASSESSMENT
Abstrakt
The content of this article is the assessment of the elements and truss structure state of the castle,
which will soon be undergoing renovations. In addition to visual assessment was also used semi
destructive drilling resistance measurement using rezistograph to determine the state of wood
mass inside the cross-sections of individual elements, which allows to determine the real state of
the elements beneath the surface, to determine the extent of infestation of individual elements of
wood-destroying insects and decay and to determine the optimal process of reconstruction of the
truss structure.
Keywords
Semi destructive methods, timber, old-house borer, decay
1 INTRODUCTION
The Czech Republic located in the temperate zone is very rich in forests and the amount of
structural wood, which is used for construction from everlasting.
Currently, there is a reconstruction of buildings mainly from the period of the 15-18 century
(castles, parish or churches). In time of their implementation were not available impregnating
agents for wood, especially against insects and rot.
A common problem is decay brought about by moisture, often owing to a leak, poor maintenance
or condensation. This allows fungi or wood-boring insects to colonize the timber and by their
action reduce its strength [1].
Construction of untreated wood roof trusses attacks mainly wood-destroying insects – old-house
borer (Hylotrupesbajulus), whichattacksmainlysoftwoodsuchasspruce, pineand larch (seeFig. 1).
Figure 1. Old-house borer (Hylotrupes bajulus)
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Ing. Kristýna Vavrušová, Ph.D., Katedra konstrukcí, Fakulta stavební, VŠB-Technická
univerzita Ostrava, Ludvíka Podéště 1875/17, 708 33 Ostrava-Poruba, tel.: (+420) 597 321 375
e-mail:
.
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Ing. Libor Žídek Katedra stavebních hmot a diagnostiky staveb, Fakulta stavební,
VŠB-Technická univerzita Ostrava, Ludvíka Podéště 1875/17, 708 33 Ostrava-Poruba, tel.: (+420)
597 321 932, e-mail:
.
