Recently broad media in the Czech Republic coverage on hazards from PV systems to fire fighters. Similar situation was in Germany two years ago. That is why Fraunhofer-Institut für Solare Energiesysteme ISE together with TÜV Rheinland and other partners implemented a research project „Assessment of fire risks in PV systems and development of safety concepts for risk mitigation“. The project concluded that the fire risk of PV system is much less than it is publicly alleged in Germany.
There is a small risk that fires can be started by PV components. This risk can be reduced by careful installation, initial verification i.e. inspection and testing, periodic verifications, (yield) monitoring to detect degradation problems, and verification of test procedures and maintenance requirements for conventional AC- components. Overall conclusion is that PV systems are not maintenance free.

Whole presentation from EU PVSEC (in English).

The real energy savings potential in the buildings in the Czech Republic study presents two main ways of energy savings development in heating in the residential buildings in the C.R. and informatively also energy savings development in heating in the buildings for education.

Blocks for masonry with integrated insulation material are known over 30 years. Especialy hollow clay bricks have low U value due to optimalization of their geometry with low thermal conductivity of ceramic body. Finaly integrated insulation material into the holes in bricks results to increasing of thermal insulation properties. Article is focus on behavior of hollow clay bricks with and without integrated insulation material in dynamic heat load.

The article deals with four-point bending test of beams made from fibre reinforced concrete with recycled aggregate and output of this test the load-deflection diagram. The differences between long and short fibres, quick and slow bending test and variation of amount of fibres are showed here.

EU declared the year 2013 us year o air. Producers and manufacturers of plastics, including EPS insulation for buildings contribute to improve the quality of the air. It describes approaches to solving envorinmental and health aspects of EPS applications.

The paper is focused on the results of testing of a key segment of the tunnel lining, which is important for the capacity of the tunnel lining itself. Strength parameters of the designed structural steel fibre reinforced concrete (SFRC) element are described. SFRC key segment with fibres dosages 50 kg/m³ are compared with ordinary RC key segment.

The development of "national plan for increasing the number of nearly zero energy buildings" is a major task of the European Parliament and of the Council Directive 2010/31/EU of 19 May 2010 On the energy performance of buildings, which was transposed by Act no. 300/2012 Coll that amends and supplements Act no. 555/2005 Coll. On the energy performance of buildings, and amends and supplements Act no. 50/1976 Coll. Planning and building regulations (Building Act).

The experimental results of long-term monitoring of total strain in two prestressed reinforced concrete sleepers B91 S, produced by ŽPSV a.s. are shown in the article. Total strain of monitored prestressed sleepers was measured by long-gauge optical fibres SOFO.

The article introduces the testing procedure of levelling instruments in construction. Generally described testing and validation procedure of levelling instruments (optical and digital as well) is supplemented by results and evaluation of four selected levelling instruments (Sokkia C40, Geo Fennell NO.10, Spectra AL100 a Leica Sprinter 150) used to work in technical levelling.

The heat transfer coefficient is an important parameter in the energy rating of buildings. It is certainly interesting to the influence of this parameter on the energy rating. In this article, this is calculated on a real house. This is designed as passive.

In order to assess the diffusion rate of solar and wind power plants in the Czech residential sector, we analyse data on licenses for business in the energy industries. We arbitrary set the maximum installed capacity for installations on residential roofs on 10 kWe and find out that the current number of such installations corresponds to 0.5 % of inhabited family houses in the Czech Republic, with most installations being in the Pilsen region and least in the Karlovy Vary and Liberec regions.
When compared with the overall development of solar power plants, it shows that the installations of up to 10 kWe accounted for about 35 % of all the solar power plant installations, but only for 1.9 % of the total installed capacity. Micro wind turbines are up to now not very expanded; we found only 20 installations of micro wind turbines.

The paper presented method of laboratory measurements for specifies air permeability of building board elements of wood- based. The aim of laboratory measurements was to designate value of air permeability of building board elements of wood- based. The results from measurement are in form protocols which indicate air permeability for differential pressure 50 Pa. The value air permeability decides about application and quality building board elements for airtight layer.

For reasons of failure to material detarioration have occurred to many premature or sudden failure of building structures. The quality of the design, execution and maintenance of building structures is a serious problem in the present. The paper presents probabilistic models of concrete deterioration that cause depassivation of reinforcement.

Energetics of structures in construction is a developing discipline that we nowadays encounter every day. Each structure rises and ends at its own life cycle period. In this article, the author evaluates an impact of the zoning plan and its studies on energetics of structures – lets save power from the beginning.

The paper focuses on the description of construction technology of concrete shell blocks with the system of internal thermal insulation. The emphasis is placed on the building envelope. There is described construction technology of external walls and implementation of internal insulation. Another part deals with description of the main details that must be resolved differently than a normal brick house. In conclusion are compare advantages and disadvantages of internal insulation.

Using the test and design standards helps to obtain a lot of information and experience in determining the thermal values of window, door structures, skylights and their components. We offer knowledge of laboratory practice.

Turbulent but often incompetent discussions about more stringent building-energy requirements are accompanied by calculations proving - often biased - what is needed. The article deals with the problem of reliability of building-energy calculations, especially when combined with financial evaluation. The stochastic calculation of energy performance of a large sample of buildings is used. Costs increase of low-energy solutions is discussed.

The current trend in the use of secondary raw materials, constantly growing demands to reduce the overall energy performance of buildings and the elimination of thermal bridges both in the design phase and in the implementation phase, helps solve a new element of the threshold coupling, combining the above mentioned requirements for construction. The threshold coupling is inserted in the form of plates under the frame fills of building hole which borders between the exterior and interior of the building. The variability is in the possibility of height and longitudinal adjustment to the exact size and greater range of boards with several kinds of geometrical modifications allowing waterproof closing of waterproofing made of the commonly used materials.

The article deals with static design of saddle roof frame with two middle purlins. This kind of bearing stucture is widely used for roofing of family houses. There are shown diferent computational models. These models are compared and evaluated.

Forestry and forest management plays many roles in the landscape and in the socio-economic area. Forests represent a landscape stabilizer, the best preserved part of the landscape of predominantly natural character with significant application of natural, spontaneous process. It also serves as a source of material benefits to human society. The wood-producing function of forests was questuioned in this country in recent years. Above all, leaders of various environmentalist movement are demanding ever greater proportion of forests without economic activity. However, forestry is afflicted by such influences by decades and the aim of this paper is to demonstrate possible implications of these trends for forestry and subsequent economic sectors.