Nejnavštěvovanější odborný web
pro stavebnictví a technická zařízení budov
estav.tvnový videoportál
Izolace, střechy a fasády
Archiv článků od 21.9.2009 do 9.8.2010

Archiv recenzovaných článků

zpět na aktuální články

9.8.2010
Ing. Jiří Frankl, PhD, Ústav teoretické a aplikované mechaniky, v.v.i., Akademie věd České republiky

From a large group of wood-damaging fungi, only a few species participate on degradation of wood built in various building constructions. In spite of that, these species often cause significant damage by their activity. The contribution summarizes knowledge gained during surveys of various wooden constructions of buildings in the last ten years. It describes vulnerable places of constructions with frequent occurrence of wood-damaging fungi, usual extent of damage, causes of creation and development of infestation by wood-damaging fungi and the most common directions of their further spreading. The contribution contains also statistical analysis of generic structure of wood-damaging fungi in particular vulnerable places.

2.8.2010
Ing. Richard Kuk, PUDIS a.s.

Drainage systems need to be addressed in the first architectural considerations. Many interesting solutions can deal with rain water, but must be prepared in the first proposals for the building and its surroundings. Green roofs, edit terrain, infiltration areas, the building's location in the terrain, etc. may be difficult to solve additionally.

26.7.2010
doc. Ing. Vladimír Jelínek, CSc.

The following contributions, which deal with this problematic, consider the impact of high heat resistance of the walling on the thermal comfort and the design of heating ventilations systems, which are still perceived, as it is the case in buildings with classical walling, therefore, to have lower thermal resistance. For instructions to formulate the effect of walling on the thermal comfort and technical equipment, a general comparison of both the following cases is made, which is simply called building with high thermal resistance of external walls for a low-energy house, and a building with classical walling parameters (e.g. housing estate from the past) as a standard house. The articles are not of exact technical nature and deal with regularly updated dependencies and sometimes refer to previously applicable legal provisions.

12.7.2010
Ing. Petr Bohuslávek, redakce

The standards ČSN 73 1901 Designing of roofs – basic provisions, ČSN P 73 0600 Waterproofing of buildings – Basic Provisions and ČSN P 73 0606 Waterproofing of buildings – Continuous sheet waterproofing – Basic Provisions have been revised in 2010. What kind of new requirements do these new standards bring? How will their approach change compared to previous regulations? We asked the people behind them about this. The current standards for roof designing have been applied since 1999. According to the proposers of the revision, the many implementations of roofs that have taken place since then have been the source of many new findings, which will be now generalised and reflected in the new standards by clarifying certain provisions or establishing new ones. Developments in European and Czech legislations and standardisations are also necessary to be taken into account.

5.7.2010
doc. Ing. Jan Kaňka, Ph.D., člen TNK 76 Osvětlení, ČKAIT Praha

The attenuation of sound wave with bends is mostly used in the design of noise walls, curtains and barriers along ways with intensive traffic (roads, rail and tram). Noise reduction from stationary sources with curtains is less common because it is always better to place the noisy device in the machine hall. This is then ventilated through a system with big enough dimensions so as to absorb sound, which then blocks the source of sound and the fan noise. Let's look at some specific installations seen in this context as well as calculations of the sound attenuation bend.

14.6.2010
Ing. arch. Miloš Solař, Národní památkový ústav

The problematic of energy savings should not be limited only to thermal insulation and occasional use of alternative energy sources. The energy used not only for heating, but also for ventilation and air conditioning. Significantly affect the consumption requirements, deciding which areas will be heated and at what temperatures. Energy is needed to produce construction materials, their transportation and eventual waste handling. The lifespan of the proposed construction and the complexity of its liquidation should be one of the essential criteria when deciding on contemplated modifications. It is necessary to consider buildings as architectural heritage.

7.6.2010
doc. Ing. Jaroslav Solař, Ph.D., VŠB TU Ostrava

The article deals with the issue of unwanted condensation of water vapour on internal surface of building structures. Building and physical conditions of surface condensation of water vapour is analysed. It discusses possibilities of technical solutions leading to elimination of the mentioned negative phenomenon – change of use, adjustment of peripheral structures, reaching the required parameters of internal air by natural ventilation or through air-conditioning.

2.5.2010
Ing. Petr Živný, Pro Windows, s.r.o.

Do you know how to choose a supplier and installers for windows? The article answers to important questions regarding the choice of windows, their frames, glazing, ironwork, sills and accessories such as shadings, etc. The author speaks from personal experiences with suppliers, manufacturers and technical supervisors. The article wants to help people buy windows with the best price/quality ration and ensure their long term satisfaction.

1.3.2010
doc. Ing. Václav Kupilík, CSc.

On the beginning of the nineties the various technologies of wood buildings, especially of assembled types, developed. Although in the present time wood buildings have already their acknowledged place even in our country in spite of that we can meet their failures predominantly at the elevational planary wooden facings of load-bearing wooden framing. One such case is also south plywood- facade of family house in Middle Bohemia.

22.2.2010
doc. Ing. Vladimír Jelínek, CSc.

The following contributions, which deal with this problematic, consider the impact of high heat resistance of the walling on the thermal comfort and the design of heating ventilations systems, which are still perceived, as it is the case in buildings with classical walling, therefore, to have lower thermal resistance. For instructions to formulate the effect of walling on the thermal comfort and technical equipment, a general comparison of both the following cases is made, which is simply called building with high thermal resistance of external walls for a low-energy house, and a building with classical walling parameters (e.g. housing estate from the past) as a standard house. The articles are not of exact technical nature and deal with regularly updated dependencies and sometimes refer to previously applicable legal provisions.

1.2.2010
Ing. Martin Varga, Ing. Tomáš Kupsa, DEKPROJEKT s.r.o.

The ČSN EN ISO 13370 Thermal performance of Buildings – Heat Transfer via the ground – Calculation methods has been valid since 2000. Until 2008 it was concurrent with the ČSN 06 0210, which was used to floor structures on soil. After its repelling, the above mentioned ISO standards became the only applicable basis for the design and evaluation of floor constructions and the conclusions arising from their use are not yet sufficiently known among the scientific community. The use of these ISO standards introduces entirely new principles of design, which are vastly different from those that have been used for several decades. The article illustratively solves the problem of the calculation of the heat transfer coefficient from floor structures built on the ground, focusing mainly on surface (indoor) objects.

11.1.2010
doc. Ing. Vladimír Jelínek, CSc.

The following contributions, which deal with this problematic, consider the impact of high heat resistance of the walling on the thermal comfort and the design of heating ventilations systems, which are still perceived, as it is the case in buildings with classical walling, therefore, to have lower thermal resistance. For instructions to formulate the effect of walling on the thermal comfort and technical equipment, a general comparison of both the following cases is made, which is simply called building with high thermal resistance of external walls for a low-energy house, and a building with classical walling parameters (e.g. housing estate from the past) as a standard house. The articles are not of exact technical nature and deal with regularly updated dependencies and sometimes refer to previously applicable legal provisions.

4.1.2010
prof. Ing. Jan Tywoniak, CSc., ČVUT Praha, pracoviště UCEEB

We can observe in the Czech press a significantly higher frequency of expressions suchs as passive house or energy-efficient construction, specially in connection with the subsidy program “Zelená Úsporám”. However, the reality is that the number of passive houses built is very low, moreover, in some of the so called passive houses there can certainly be doubts about their actual properties.

21.12.2009
Ing. František Konečný

The important factor during the process of the preparation and the realization of the buildings is the knowledge of the legal regulations that solve the safety at construction. The solving of safety begins already during the preparation of the building plan. The investor should find out whether the planned construction is a kind of constructions for that a coordinator for safety at construction must be established. It must be distinguish to which extend and for which constructions the legal regulations refer and wheather they also refer to houses.

9.11.2009
Ing. Petr Kejklíček, Promat, člen sdružení CERPAD

In the first half of this year new came in force new standards that define new requirements for the design of thermo insulation systems in buildings. They are ČSN 73 0810 - Fire safety of buildings - Common provisions (April 2009) and ČSN 73 0802 - Fire safety of buildings- Non industrial buildings. The changes in these standards bring a number of major innovations. Let's have a look with them with the aid of images.From the result it is evident that the implementation of external thermal insulation systems for buildings with final approval before 200, and new buildings must follow the additional requirements listed in the articles of the standards ČSN 73 0810 and ČSN 73 0802, particularly in relation to the classification of types of components on the DP1, DP2, DP3. The implementation of additional insulation requires good design, preferably done by a specialist, the application of comprehensive quality and the choice of contractors with certifiable good references.

12.10.2009
Ing. Petr Zahradník, SEVEn, The Energy Efficiency Center, z.ú.

The article reacts on changes that were made in program "Zelená úsporám" in recent days. Previous article described how to reach required standards for successful subsidy application in two ways. Following text focuses on changes in this approach both from subsidy amount and possibility of subsidy itself viewpoints. In general, portfolio of potential subsidy applicants has been extended, but necessary quality of subsidized measures has been kept.

5.10.2009
Ing. Ondřej Šikula, Ing. Olga Rubinová, Ph.D., VUT v Brně, Fakulta stavební, Ústav technických zařízení budov

Solar collector is designed to obtain part of heating requirements of the buildings from the sun. Air-type collector that use air as the heat transfer medium is one of the simplest methods of solar heating. This solar heating technique can be made part of house design and construction.

5.10.2009
Ing. Viktor Zwiener, Ph.D., DEKPROJEKT s.r.o.

The examination method Blower-Door test (fan pressurisation method) is used for measurements of air permeability of buildings and is also used for leakage detection. The result of the measurement is air leakage rate at the pressure differential across the building envelope of 50 Pa. The article points out leaky details which often appear at constructions. The article shows the possibility of using infrared camera and anemometer for leakage detection.


zpět na aktuální články
 
 
Reklama