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The increasing importance of environmental protection issues has recently forced a low–emission approach to investment processes. To accomplish the European Union's climate, energy and environmental goals, action is needed to achieve high levels of energy efficiency and low environmental damage. Among the energy–intensive sectors, construction deserves a distinction due to its leading share in gross energy consumption in developed countries. Therefore, it is necessary, and at the same time more and more popular, to analyse the environmental loads generated in individual phases and throughout the life cycle of building objects. This subject is also gaining importance in the context of the recent increases in the prices of energy carriers, which forces the search for new construction and exploitation solutions in line with the philosophy of sustainable development and the circular economy. The aim of the analysis was to assess the environmental consequences in the life cycle of a real commercial building located in Janikowo (Kuyavian–Pomeranian Voivodeship), which was carried out using the LCA (Life Cycle Assessment) methodology. The obtained results indicated the dominance of the facility exploitation phase in the level of cumulative environmental loads.

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Many existing steel structures are exposed to degradation due to corrosion or fatigue and to increasing loads. Their reliability assessment is then needed. The key question is whether a particular structure can be preserved ‘as it is’, or needs to be strengthened, or whether it needs to be replaced. Unnecessary replacements of existing structures may be avoided and the remaining service life of existing steel structures may be authorized by: using advanced reliability verification techniques, optimizing target reliability, and obtaining data for a specific site or structure. In this contribution, the application of advanced reliability approaches is illustrated by the assessment of an existing steel structure. The case study demonstrates that such approaches may significantly improve assessment and allow to increase the load-bearing capacity of the structure (in the case under investigation by 10 to 20%). Improvements in reliability assessment are attributed to the use of an optimal target reliability level, case-specific statistical parameters and probabilistic distributions of the basic variables, and adjusted partial factors.

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The increasing average annual temperature value is observed in many cities around the world. More and more often, not only the Southern Europe inhabitants, but also those from the Central and Northern Europe are exposed to thermal stress. Nature Based Solutions (NBS) play a key role in mitigation, i.e. the process of alleviating the negative effects of climate change in highly urbanized areas.

The main objective of this study is to answer the question whether the planned spatial activities involving the use of NBS solutions in the New Centre of Lodz contribute to the improvement of the urban spaces’ microclimate and the thermal comfort of people in the external environment. The subject of the work is the microclimate of urban spaces, understood as a climatic conditions set, in particular thermal conditions, in a given, small area. The spatial scope of the work covers a 30-hectare part of the New Centre of Lodz limited by the following streets: Kilińskiego, Narutowicza, Piotrkowska, Tuwima, which is currently undergoing a large-area revitalization process. In order to determine the microclimate conditions and thermal comfort, numerical simulations conducted in the ENVI-met program were used.

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The article focuses on the study of medium density sand and sandy loam density changes during water-cement solute injection and pressiometer expansion. Cement mortar injection is performed into boreholes under small pressure of up to 300 KPa resulting in radial well expansion. This expansion process also takes place during pressiometer studies. A cavity of compacted soil is formed around the expended boreholes in radial direction; the anchor and pile load determine field studies of the load, which they can perceive along lateral surface. It is worth noting that they frequently do not coincide with the calculated values. Following field anchor excavations, it was observed that root shearing can occur both directly at the contact between the cement root and the soil and at some distance from it. Subsequent laboratory studies revealed that when the soil is pressed, its density can change along a sinusoid, comprising pressed zones and decompaction zones. This gives rise to the displacement of the shear zone at the contact between the root and the soil.

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In this paper, the authors analysed several variants of connections between a block rail (60 mm × 60 mm) and a crane runway beam (IKS 800-6). They compared local vertical compressive stress in the crane runway beam web, calculated using an analytical approach and numerical simulations. In the case of the continuous block rail rigidly fixed to the beam flange, satisfactory convergence was obtained. For the remaining types of connections the results based on the analytical method were different from the results of the numerical simulations. The difference resulted from the fact that the analytical method did not take into account the crane rail joint. Furthermore, the impact of the elastomeric bearing pad on the local stress value was taken into account in a simplified manner in the analytical method by increasing the effective length by approximately 30%. The local vertical compressive stress in the crane runway beam web was significantly affected by the connection between the rail and the crane runway beam, the crane rail joint type, the use of the elastomeric bearing pad, the length of the elastomeric bearing pad, and the crane rail wear.

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This article is an analysis of methods of securing historic walls in objects in the form of so-called permanent ruins. The research group consists of the brick Gothic castles of Mazovia in Ciechanów, Czersk, Liw and Sochaczew. Based on the analysis of documentation and our research, the effectiveness of the solutions applied in 4 different technological variants was evaluated. The state of preservation of the introduced solutions after several years of work was also assessed. The entire study was summarised in a table and conclusions were drawn.

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The castle in Ciechanow is classified as a Gothic castle of the lowland type. The building, which is an example of defensive architecture, is located to the north of the historic urban layout of the Ciechanow centre. At present, the castle is covered by the following forms of protection: protection for the Natural and Landscape Complex "Łydynia River Valley”, provisions of the Local Spatial Development Plan and an entry in the Register of Historic Monuments. The authors of the paper analyse the legal regulations concerning the castle and their impact on the contemporary castle’s exposition  in the landscape.

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Housing blocks constructed from prefabricated elements have been the backbone of housing resources in many Polish cities in the last fifty years. Over the time, the residents’ expectations regarding the residential amenity standards, as well as demographic structure of the estates built in the communist era have changed. Therefore, the current residents’ needs significantly differ from the needs and expectations of those who took over the newly built flats in the last quarter of the 20th century. Fundamentally, the functional and spatial standards of flats built before 1989 are already out of date. The proper functioning of the usable dwelling space of these apartments has gained additional importance due to the inhabitants getting progressively older and, especially recently, the prolonged SARS CoV-2 pandemic. The introduction of the lockdown, which involved strict restrictions on movement outside the place of residence during the pandemic, made the apartments the centre of life and a place of work for many families. Suddenly, for psychophysical reasons, the importance of having larger floor space, than the functional solutions typically used in the 1970s and 1980s offered, has increased. It appears that the residents begun to take interest in all possible solutions to improve the functionality of their homes. The aim of the article is to present proposals for contemporary architectural solutions that can improve the functionality of these apartments that would increase residents’ standard of living and everyday comfort.