English Section - TZB-info

Uhlíková stopa z výroby a distribuce paliv vyrobených z dřevní hmoty

4.12.2023 | Ing. Zdeněk Lyčka

Návrh nařízení Evropského parlamentu a Rady o fluorovaných skleníkových plynech upřednostní přírodní chladiva

20.11.2023 | Ing. Josef Hodboď, TZB-info, obor Vytápění

Analýza emisí chladiv v Německu – včetně roku 2022

9.10.2023 | Ing. Josef Hodboď, TZB-info, obor Vytápění

Stanovení výhřevnosti palivového dřeva z naměřené vlhkosti

19.9.2023 | Ing. Zdeněk Lyčka

Use of CO₂ as a Tracer Gas for Leakage Detection in Air Handling Systems

7.8.2023 | Ing. David Petrýdes, Ph.D., MBA, Air-lab s.r.o.
The paper focuses on the experimental verification of the use of CO₂ as a tracer gas for the detection of leakages in air handling systems, instead of the widely used tracer gas of sulphur hexafluoride (SF₆), which is subject to legislative restrictions. Verification of the applicability of CO₂ is accompanied by the definition of measurement uncertainties.

Residential building ventilation model according to the standard ČSN EN 15 665/Z1 Ventilation of buildings

3.7.2023 | Ing. Hana Kabrhelová, Ph.D.
The author answers the question whether the ventilation prescribed by the standard ČSN EN 15 665/Z1 Ventilation of buildings is sufficient in terms of the amount of ventilation air. In the case of choosing the minimum values specified in the standard, this may not be the case.

Ing. Alžběta Svobodová, Katedra TZB FSv ČVUT

Vliv namrzání na provoz výměníku zpětného získávání tepla

24.2.2023 | redakce

Requirements for Ventilation of Residential Buildings as of January 1, 2023

30.1.2023 | Ing. Hana Kabrhelová, Ph.D.
Meeting the energy efficiency criteria of buildings requires paying increased attention to the energy consumption caused by ventilation. Multiple regulations affect ventilation design. Their overview is in the article with a short comment.

Rural Sanitation from a Sustainability Perspective

7.12.2023 | Ing. Karel Plotěný, ASIO, spol. s r.o.
The paper discusses solutions to rural sanitation. As population density decreases, the cost of central sanitation rises, and so villages with high sanitation costs risk having sewerage charges above the socially acceptable water price. This is also why other methods of sanitation should be used. In addition, in future, rural solutions should take into account not only the economic aspect but, as with other investments, all aspects of sustainability (see EGS assessment). Following the experience of climate change impacts, experience of natural phenomena and war events, the impact on climate change and the resilience of solutions to risks should also be part of the assessment.

Checklists and Their Use in Pipeline Construction and Operation. Part 4 — Conclusion, New Trends and Bibliography

18.10.2023 | doc. RNDr. Dana Procházková, Ph.D., DrSc., ČVUT v Praze, Fakulta strojní
The presented set of four communications deals with the risk management in favour of safety applied to the operation of pipelines. It respects current professional knowledge and presents it in the concept promoted by the UN, the European Union, the OECD and others. The fourth part contains a conclusion, characteristics of new aspects addressed by the professional sphere for practice and a list of used literature.

Checklists and Their Use in Pipeline Construction and Operation. Part 3 — Checklist and Its Examples for Pipelines

17.10.2023 | doc. RNDr. Dana Procházková, Ph.D., DrSc., ČVUT v Praze, Fakulta strojní
The presented set of four communications deals with the risk management in favour of safety applied to the operation of pipelines. It respects current professional knowledge and presents it in the concept promoted by the UN, the European Union, the OECD and others. The third part summarizes the findings on the checklist methodology and provides examples for pipelines.

Checklists and Their Use in Pipeline Construction and Operation. Part 2 — Risk Management and Pipeline

13.10.2023 | doc. RNDr. Dana Procházková, Ph.D., DrSc., ČVUT v Praze, Fakulta strojní
The presented set of four communications deals with the risk management in favour of safety applied to the operation of pipelines. It respects current professional knowledge and presents it in the concept promoted by the UN, the European Union, the OECD and others. The second part summarizes the knowledge and principles of risk management and lists the sources of risks for the pipeline.

Emise lodí, aut a letadel – které mají větší dopad na globální oteplování?

28.9.2023 | Mgr. Jiří Zilvar, redakce

Metan: kromě lidské činnosti jej produkuje i sama příroda. V čem je potenciál metanu při zmírňování změn klimatu?

17.8.2023 | Adam Bednařík, Ústav výzkumu globální změny AV ČR (Czechglobe)

A Pilot Unit Using BDW for Biomethane (RNG) Production via Catalytic Methanation

17.7.2023 | Ing. Jan Kulas, UJV Řež, VŠCHT, Ing. Lukáš Polák, Ph.D., Nikita Streltsov, UJV Řež | Časopis Plyn 2-2023
Catalytic methanization of carbon dioxide increases the content of sustainable biomethane, or RNG (Renewable natural gas), produced from BRO (biodegradable waste). The advantage is the production of biomethane (increase in energy content) without the need for carbon dioxide separation.

Materiály pro Li-ion akumulátory – porovnání

3.11.2022 | Tomáš Kazda, Ústav elektrotechnologie VUT v Brně

Fiber-optic FBG Sensors

25.1.2021 | Ing. Radim Šifta, Ph.D., NETWORK GROUP, s.r.o.
The paper describes special types of fiber optic point sensors based on FBG (Fiber Bragg Grating) and FP (Fabry-Perót) structures. First part of the paper deals with principle of FBG and FP and their exposition. Next part is focused on different types of FBG and FP sensors and principle of interrogation units. Finally practical examples of use are listed.

Fiber Optic Sensors

20.1.2021 | Ing. Radim Šifta, Ph.D., NETWORK GROUP, s.r.o.
The paper deals with special types of sensors that use optical fibers to measure various non-electrical quantities. The introduction describes the principle of light transmission in optical fibers and their applications. Main part is focused on fiber-optic sensors and their dividing. Special attention is paid to the distribution sensory systems and their practical application.

Kdy jste naposledy viděli sinusovku?

10.7.2020 | Ing. Jiří Ullsperger, MBA

Zásahová činnosť hasičov pri požiaroch alebo dopravných nehodách elektromobilov

7.6.2020 | Ing. Petr Tánczos, PhD., Okresné riaditeľstvo HaZZ v Komárně, Mgr. Bc. Viktória Sláviková, ROBUSTECH Komárno, Ing. Zoltán Tánczos, PhD., Okresné riaditeFstvo HaZZ v Galante, doc. Ing. Mikuláš Monoši, PhD., Žilinská univerzita v Žiline, Fakulta bezpečnostného inžinierstva

Provozní prohlídky výtahů

24.8.2015 | Ing. Bohuslav Kratěna, Unie výtahového průmyslu České republiky

Poznatky z prověřování (auditu) firem provádějících servis na výtazích

20.7.2015 | Vladimír Hulena, pověřený HK ČR k provádění auditu
CSN 27 4002 2014 Safety rules for lifts - Operation and service of lifts has introduced a new term by an authorized service company. It is the transparency of professional competence companies in servicing elevators, to owners / operators can better decide with whom an agreement that service because it has a major impact on their responsibility to ensure the safe operation of elevators. Therefore, for this situation was the subject of speculation, it was decided to examine service firms independent commissioners, contracted authorizing body, in this case, the Chamber of Commerce, which, when positive evaluation subsequently issue a certificate of authorization, and the company name may Authorized service company use.

News in the standards and audits for elevator industry

28.7.2014 | Ing. Jan Dvořák, Ing. Bohuslav Kratěna, Vladimír Hulena, Unie výtahového průmyslu ČR
Union for Elevator Industry summarizes the most important news in the standards and audits, as presented at the seminar Elevators 2014. This includes controversy with a new concept of authorized service company that has been published on our portal in advance.

Zákaz používání výtahu za požáru - výtah neslouží k evakuaci osob

Standards in the projects in terms of fire safety of elevators

21.7.2014 | plk. Ing. Zdeněk Hošek, Ph.D., Ministerstvo vnitra ČR, generální ředitelství Hasičského záchranného sboru ČR
Elevators belong to a very important building services and technologies. For these reasons, they need to pay attention not only in terms of proper technical implementation, but also in terms of fire safety. In particular, fire and evacuation lifts, which are also very important fire safety devices must also meet the stringent technical requirements of fire protection.

10 způsobů, jak v zimě zajistit dostatek nízkoemisní energie

7.9.2023 | Mgr. Jiří Zilvar, redakce

Hybridní zdroj Energy nest – vizualizace, Zdroj: prezentace Energy nest

Energy nest: baterie a plynové turbíny poskytnou 30 MW na podpůrné služby

21.8.2023 | Ing. Milan Bechyně, redakce TZB-info

Analýza potenciálních úspor energií, nákladů životního cyklu budov a environmentálních dopadů při využívání dřeva ve stavebnictví

14.5.2023 | Ing. Jitka Beránková, Ph.D., Ing. Luboš Drahňovský, Ing. Antonín Novotný, MBA, Výzkumný a vývojový ústav dřevařský, Praha, s.p.

Hodnocení zdrojové přiměřenosti elektroenergetického sektoru ČR do roku 2040

12.5.2023 | Jitka Kuncová, ČEPS, a.s.

Maintenance engineering as characterised by the new European standard

5.12.2023 | Juraj Grenčík
The paper presents the concept of maintenance engineering as understood in the new European standard EN 17666:2022 Maintenance - Maintenance engineering - Requirements. The standard introduces maintenance engineering as a discipline that uses competencies, methods, techniques and tools to develop and support maintenance to ensure that (maintenance) item is able to perform its required functions in a safe, sustainable and cost-effective manner throughout its life cycle.

Documentation of Listed Buildings from a Surveyor’s Point of View

21.11.2023 | Ing. Ondřej Vystavěl, Ing. Michal Kuruc, Ph.D., Ing. Alena Berková, Ing. Tomáš Volařík, Ph.D., VUT v Brně, Ústav geodézie

Využití modelu BIM a přímé propojení s CDE platformou

20.7.2023 | Ing. David Neužil, Construsoft s. r. o.

Study of Renovation of Existing Family Houses to Energy Category D According to Future EU Requirements

30.5.2023 | Ing. Veronika Dokoupilová, doc. Ing. Petr Horák, Ph.D., VUT v Brně, Fakulta stavební, Ústav technických zařízení budov
Modifications of a large number of older family houses to classification class E or class D energy efficiency can be implemented by measures on the side of the building envelope even without changes to heat sources, if this obligation is introduced. Roughly, it is expected after 2030.

RECENT REVIEWED EDITORIAL RESEARCH PAPERS IN THE FIELD OF BUILDING SERVICES ENGINEERING

Latest reviewed editorial research papers in the field of construction

Jaké vlastnosti má Sorelův cement a jak jej využít na podlahy a omítky

17.11.2023 | prof. RNDr. Pavla Rovnaníková, CSc.,, VUT FAST v Brně, Ústav chemie

Parametric Study of Shear Resistance of Prestressed I Beam

22.10.2023 | Ing. Jaroslav Baran, Slovenská technická univerzita v Bratislave, Stavebná fakulta
The prepared experimental program focused on the shear resistance of presstressed beams with bonded tendons needed to develop a parametric study, focused on the shear resistance of the designed beams. In the contribution, a parametric study of beam with I - cross section type DPS VP I/10 with total length of 7,0 m and a height of 0.6 m with different levels of prestress and different levels of shear reinforcement is processed. The standardized reinforcement of the cross-section used in practice is supplemented by longitudinal bars. Different design approaches were used to determine the shear resistance of the beam.

Komplexní rekonstrukce kladenského zimního stadionu

15.10.2023 | Ing. Jindřich Beran, EXCON, a.s., Ing. Pavel Bejček, B.B.D., s.r.o.

Analysis of Behaviour of Beams of Recycled Aggregate Concrete Subjected to Shear and Flexural Load

1.10.2023 | Ing. Matej Jurgoš, Slovenská technická univerzita v Bratislave, Stavebná fakulta. Katedra betónových konštrukcií a mostov
This paper deals with the effect of recycled aggregate in concrete beams that are subjected to flexural and shear stresses. The beams are reinforced with two types of longitudinal bearing reinforcement. The reliability factor is slightly reduced. For concrete with recycled aggregate, it is 3 % for EC2 and 5 % for prEC2. For concrete with recycled aggregate, brick aggregate it is 13 % for EC2 and 14 % for prEC2.
The reduced modulus of elasticity does not affect the results. The coefficient of variation for reinforced beams GFRP reinforcement is 6.98 % for beams with 10 mm reinforcement and 9.40 % for beams with 16 mm reinforcement. The coefficient of variation for beams reinforced with 10 mm diameter steel reinforcement is 16,79 %, and for beams reinforced with 16 mm diameter steel reinforcement is 9,87 %

Vliv fotovoltaiky na statické posouzení konstrukce střechy s nosnými trapézovými plechy

5.12.2023 | Ing. Jan Mařík, Ph.D., Ing. Paed. IGIP, Ing. Jan Seifert, KONSTAT s.r.o.
Solar photovoltaics are massively being placed on roofs of both new and existing buildings with trapezoidal sheeting as the roof load-bearing structure. If the design of photovoltaics supporting structure is not solved regarding the possibilities and limitations of the trapezoidal sheeting the serious structural problem can occur. Especially in combination with other common defects and mistakes connected to these structures. Nowadays the issue of localized load distribution from the photovoltaics to the trapezoidal sheeting is often underestimated and a lot of suppliers often don´t want to deal with this matter.

Cable nets for glass façades – Design and parametrical studies

6.11.2023 | Mgr. Vitalii Komlev, prof. Ing. Josef Macháček, DrSc., ČVUT v Praze, Fakulta stavební
The article presents the design of prestressed cable-net glass façades based on the ANSYS software. The suggested model is validated and verified using published tests and published models in another software and used for a parametrical study of façades with point-fixed (“spider”) fittings. The study embodies two dimensions of the net, a spectrum of stainless steel Macalloy single spiral strands and laminated glass panes of various thickness. The cable prestress was taken as 30 % of their design load in accordance with published recommendations. The design respects the valid European standards for glass and loadings in serviceability and ultimate limit states. The results present tables of deflections, glass stresses and cable forces.

Cable Nets for Glass Façades – Introductory Study

30.10.2023 | prof. Ing. Josef Macháček, DrSc., ČVUT v Praze, Fakulta stavební
The article deals with preliminary information on design of prestressed cable-nets supporting large glass façades. Described are façade components and examples of prominent realized façades. In the survey of primary publications the trend of experimental and theoretical approaches concerning design problems of these structures is presented (securing of necessary stiffness and load capacity, danger of a glass-cable-net connection failure, failure of anchors or loss of prestressing, dynamic behaviour during failures, blasts and earthquakes, temperature effects). In more details are described publications used in the follow-up Part [31] for validation and verification of the own numerical analysis and parametric studies of these façades.

Akustické vlastnosti skartovaného papíru

4.9.2023 | Ing. Pavel Rubáš, Ph.D., Technický a zkušební ústav stavební Praha s.p., Bc. Marie Hartlichová

Thermal Properties of Double Window and Modern Construcions Jamb

20.3.2023 | Ing. Lucie Kudrnáčová, Ph.D, ČVUT v Praze, Kloknerův ústav, Oddělení stavebních materiálů
The paper deals with the comparison of the thermal properties of jamb for different types of windows. In the case of reconstruction, it is often necessary to preserve the original double- windows or to use modern materials due to the thermal solution of the building. Modern constructions mean the use of double or single windows with thermal-insulating glazing. These changes in the construction of the window have an effect on the thermal processes on the structure. One of the important parameters for the assessment of the building structure is the assessment of the internal surface temperature of the building structure. This article shows the difference in finishes and heat flows to remove different types of windows. The reference window for comparison is the original double history window. The results were found in a model environment in 2D software.

Point Connections for Load Bearing Structures

27.2.2023 | Ing. Michaela Zdražilová, Ing. Zdeněk Sokol, Ph.D., prof. Ing. Martina Eliášová, CSc., ČVUT v Praze, Fakulta stavební
Contemporary architecture often works with glass facades, roofs or even glass columns and beams. The problematic part of a glass structure design is usually a connection between the glass elements and the rest of structure. In order to achieve as much transparency as possible, various mechanical point fixing systems, adhesive connections and their combinations were developed. Although being widely used, the design procedure is mostly based on experiments. There is ongoing research at the Czech Technical University in Prague focusing on characteristics of an embedded laminated connection under various types of loads. Within the initial phase of experiments, small scale specimens consisting of different glass and foil types were tested. The experiments revealed the tensile, eccentric shear and compressive short-term load-bearing capacity of the connection and a dominant mode of failure. Data obtained from the tests are going to be used for further numerical simulations and a parametrical study.

Effect of the Chosen Parameters on Stress in Bolted Connection in Glass

26.4.2021 | Ing. Lucia Ondrušková, Slovenská technická univerzita, Stavebná fakulta, Katedra kovových a drevených konštrukcií
Increased stresses occur near the supports of glass structures, which can be decisive for design of glass member. Recommendations for minimum distance of bolted connection from the edge can be found in current standarts. For verification of details are used FE-models. Influence of the edge distance and material thickness on the maximum stress value at the edge of the hole in glass loaded in its plane is compared in this paper.

The Anual Energy Balance of the Windows: the Case Study

22.3.2021 | Ing. Libor Šteffek, Ph.D., Ing. Jiří Kalánek, Ph.D., VUT FAST Brno, Ústav pozemního stavitelství, prof. Ing. Milan Ostrý, Ph.D., FAST VUT v Brně, Ústav pozemního stavitelství
The paper deals with the energy balance of windows for different combination of glazing parameters in connection with their orientation. Sum of solar gains through the transparent surfaces of a building envelope depends mainly on the size, their orientation and the g-value. Large glazed surfaces with correct orientation ensure large solar gains, but they are also the weakest part of the thermal isulating building envelope.
The influences of various U-value (U_g) and g-value of glazing on the energy performance of selected passive house were calculated by the use of computer simulation.

Effect of Wood-cement Materials Composition on Stabilization of Spruce Chips Properties

26.4.2022 | Ing. Tomáš Melichar, Ph.D., doc. Ing. Jiří Bydžovský, CSc., Ing. Lenka Mészárosová, Ph.D., Ing. Amos Dufka, Ph.D., Vysoké učení technické v Brně, Fakulta stavební, Ústav technologie stavebních hmot a dílců
One of the very essential aspects to ensure adequate durability of composite materials that combine cementitious matrix and wood is the stabilization of the wood structure. Stabilization of the wood structure is particularly important in relation to the moisture effect on the wood-cement composite mechanical properties. Stabilization of the wood matrix is generally carried out by means of suitable types of additives. This paper deals with a detailed analysis of the influence of the wood-cement materials composition in relation to the effect of liquid water. Another essential area of the presented research is the analysing the ability of the modified matrix (by different types of industrial wastes) to fix sugars in the structure of the wood mass, with regard to the possible affecting the hydration process of the cement matrix.

Leveling Material of Dry Floors Based on By-product from Cement-bonded Particleboard Formatting

11.4.2022 | Ing. Tomáš Melichar, Ph.D., doc. Ing. Jiří Bydžovský, CSc., Ing. Miroslav Vacula, Ing. Šárka Keprdová, Ph.D., Vysoké učení technické v Brně, Fakulta stavební, Ústav technologie stavebních hmot a dílců
Floor leveling materials have an irreplaceable place in the construction or reconstruction of buildings, especially in the construction of floors where the aim is to reduce the wet process in relation to the speed of completing. Various types of raw materials (expanded clay, aerated concrete, mineralised wood chips, etc.) are used for floor leveling materials. This paper presents research and development of a new type dry leveling floor material based on treated cuttings from cement-bonded particleboard processing. This leveling material is intended for reconstruction and even construction of new floors in buildings. Research and development takes into account the environmental situation, because approximately 5,000 t of cuttings is produced during the formatting of cement-bonded particleboard annualy. The intention of the research and development was to assess the properties and behaviour of the leveling material based on suitably modified cuttings from the production of cement-bonded particleboards. The composition of the cuttings was adjusted in a jaw crusher and subsequently, different variants of the leveling material were analysed in terms of particle size distribution, compressibility, confined compressive strength, water absorption and thermal conductivity coefficient. The properties of the developed material were also compared with the parameters of commonly commercially available leveling materials.

Komentář k normě ČSN 74 4505 Podlahy – společná ustanovení (6)

17.5.2021 | doc. Ing. Jiří Dohnálek, CSc., autorizovaný inženýr a soudní znalec
Together with the professional magazine Podlahy Profi, we have prepared a series where the authors get acquainted with the basic standard ČSN 74 4505 Floors - Common provisions and subsequently with other standards that are important for the floor area and respond to comments from opponents and reviewers. The fifth part is devoted to another chapter of the ČSN 74 4505 standard, entitled Floor testing.

Komentáře a diskuse k obsahu normy ČSN 74 4505 Podlahy (4. část)

5.4.2021 | doc. Ing. Jiří Dohnálek, CSc., autorizovaný inženýr a soudní znalec

SBToolCZ. The Latest Online Version of the National Building Sustainability Assessment Methodology

6.2.2023 | Ing. Kateřina Klepačová, Ing. Magdaléna Novotná, Ph.D., Ing. Martin Volf, Ph.D., Ing. Jakub Diviš, Ph.D., Ing. Jan Růžička, Ph.D., ČVUT v Praze, Univerzitní centrum energeticky efektivních budov

ilustrační foto: Main Point Karlín © TZB-info

Environmental Certification of Buildings - the Situation in the Czech Republic

30.4.2021 | Ing. Zuzana Mrňová, VUT FAST Brno, Ústav stavební ekonomiky a řízení
A responsible approach to the environment is not only related to corporate ecology, but is also increasingly reflected in the design and construction of buildings, which is closely related to the concept of sustainable construction of buildings. With the development of sustainable construction, the need arose to evaluate buildings and their impact on the environment. For this reason, environmental certifications of buildings have been developed, which assess how a building affects its surroundings during its life cycle.
The aim of this article is to find out which environmental certifications exist in the world and which of them are most often used in the Czech Republic. Finally, the certifications are compared and their main differences are described.

ilustrační obrázek © starush - Fotolia.com

Stavebně-energetické koncepce budov ve společenských souvislostech

8.2.2021 | prof. Ing. Jan Tywoniak, CSc., ČVUT Praha, pracoviště UCEEB | Dřevo&Stavby Profispeciál 2020

Novela vyhlášky č. 78/2013 Sb. – (264/2020 Sb.); Část 5: Úprava požadavků na budovy s téměř nulovou spotřebou energie (NZEB)

10.6.2020 | Ing. Michal Čejka, Šance pro budovy

Ochrana dřeva, trvanlivost povrchové úpravy dřevěných fasád a teras

2.10.2023 | Ing. Petr Ptáček, Ph.D., ČVUT v Praze, pracoviště UCEEB
The protection of wood in wooden buildings does not seem to be very important due to their location in use class 1 or 2 according to ČSN EN 335, but it is particularly suitable for timber elements that are located close to the foundation slab or are difficult to replace. It follows from the majority of recurring defects, for example plumbing failures, leaks through the roof, facade, inappropriate terrain height around the base plate or as a result of a tornado, that it is necessary to protect at least the foundation threshold according to the structure of the wooden building, preferably up to use class 4 according to ČSN EN 335, which is only possible by pressure impregnation.

Stěnový panel se svisle orientovanými OSB deskami při experimentálním testování

Analýza vlivu orientace desek opláštění na horizontální únosnost a tuhost stěnových panelů dřevostaveb

10.7.2023 | prof. Ing. Antonín Lokaj, Ph.D., Ing. David Mikolášek, Ph.D., VŠB TU Ostrava, katedra konstrukcí
The paper deals with the experimental and numerical analysis of the influence of the orientation of large-area sheathing panels of load-bearing wall panels of wooden buildings. The experimental results were then compared with the numerical model in SCIA Engineer and with the analytical calculation.

Dendrologický průzkum, jeho funkce a význam

22.5.2023 | Ing. Andrea Nasswettrová, Ph.D., MBA, ProDřevo ateliér, Společnost pro technologie ochrany památek STOP, z.s.

Complex Wood Based Houses Market Analysis

22.5.2021 | Ing. Tomáš Hrdlička, VUT v Brně, Ústav soudního inženýrství
It was finished 18 390 houses in the Czech Republic. Houses are the most frequent finished type of buildings. The share of construction of brick houses is 83.1% and for wood-base houses its 14.9%. Database of 1520 bids for houses was completed and how what is typical Czech house. It is single floor brick house with sloped roof. The heating system is compiled by electric heater and radiators. Also house market analysis was made. 631 sold houses was examined in the period 2017-2020 in Brno-venkov district, Czech Republic. Only 1.3% wood-based houses was detected.

Ohrožení památkových objektů mikroorganismy

16.10.2023 | RNDr. Hana Zvěřinová Mlejnková, Ph.D., Výzkumný ústav vodohospodářský T. G. Masaryka, v. v. i., Praha, Ing. Pavel Sedláček, Ing. Milena Forejtníková, ýzkumný ústav vodohospodářský T. G. Masaryka, v. v. i., Praha
The article introduces the project, which elaborated in detail a draft methodology for the assessment of biohazard of monuments, including damage to individual elements, and assessed the degree of potential threat to selected categories of monuments and protected areas using a unified procedure for the entire territory of the Czech Republic.

Používání azbestu ve stavbách a co je možné s tím dělat

18.9.2023 | prof. RNDr. Pavla Rovnaníková, CSc., VUT FAST v Brně, Ústav chemie

Kvalita a ruční opracování stavebního dřeva pro konstrukční opravy

21.8.2023 | Ing. Michal Kloiber, Ph.D., Ústav teoretické a aplikované mechaniky AV ČR, Centrum excelence Telč, Petr Růžička, Ústav teoretické a aplikované mechaniky AV ČR, Centrum excelence Telč, Laboratoř diagnostiky II
Extensive field experience in repairing wooden structures shows two basic limiting factors for the quality of the work, which are often circumvented or simplified in various ways. Firstly, the quality of the timber used for repairs (replacements, prostheses) and the resulting problems in not following the recommended criteria for selecting the appropriate material, with regard to the long-term coexistence of the new timber with the original material. In the second case, the methods of wood treatment are a very influential factor, where, for various reasons, the preferred traditional methods are replaced by imitations without any benefits. In this article, due to its limited scope, only the most obvious case will be discussed, namely the treatment of logs by hewing.

Tepelná ochrana historickej budovy v Košiciach pomocou dynamických simulácií

15.5.2023 | Ing. Kristián Hutkai, prof. Ing. Dušan Katunský, Ph.D., TU v Košiciach, Stavebná fakulta
The paper deals with thermal protection of a historical building in Košice. The building is currently used in full function as a puppet theater. However, it suffers from malfunctions caused by increased humidity. Part of the paper is devoted to the moisture analysis, which was carried out in a destructive way using the gravimetric method. The main part of the contribution deals with the results of dynamic simulations, during which the thermal-moisture response of the historical wall was analyzed after the application of thermal insulation from the interior.

Daylighting Evaluation in Habitable Rooms According to Current and Draft Requirements

13.11.2023 | Ing. et Ing. Lenka Gábrová, Ph.D., Ústav pozemního stavitelství, Vysoké učení technické v Brně, Fakulta stavební
The article deals with daylighting assessment in habitable rooms according to the currently valid Czech Standard ČSN 73 0580-2 and according to the Draft Czech Decree on Requirements for Constructions. The case study investigates and compares the daylighting availability in rooms which meet the requirements stated in the draft decree.

The Influence of Wallpapers on the Interior Environment of Historical Buildings

23.10.2023 | Ing. et Ing. Eva Šoulová, Vysoké učení technické v Brně, Fakulta stavební, Ústav pozemního stavitelství
Textile and leather wallpapers are an integral part of the interior of historic buildings. These types of wallpaper are specific in their construction, where they are stretched on wooden frames and form a membrane in front of the wall. Verification of diffusion properties is one of the steps to elucidate the thermal-humidity behaviour of these historical structures. Knowledge of diffuse properties is important for architectural and historical surveys and for the reconstruction of historical buildings. Based on this knowledge, we can assess other properties of wallpaper construction, such as moisture and microbial climate.

Revision of Standard ČSN 73 0527

9.10.2023 | Ing. Tomáš Hrádek, AVETON, s.r.o.
The standard “ČSN 73 0527 Acoustics – Acoustical design of rooms – Rooms for cultural uses – Rooms in schools – Rooms for public purposes” was revised after 18 years. In the framework of this revision, the regulations for determining the optimum reverberation time were updated, especially in relation to commonly used technologies and trends in the use of the spaces in question. A new methodology for determining the standard of acoustic treatment for spaces with lower acoustic requirements was developed and, last but not least, a code for occupancy calculations for measuring reverberation time in unoccupied spaces was defined.