Abstract. The article analyses environmental and ecological criteria of selecting the most beneficial offer in the aspect of LCC. Construction works contracts and the potential method of defining the above criteria, among others, is pondered on (for example by the recommendation of a material, which is supposed to be used, a ban on substances that are harmful for human health as well for the environment). In the relation to the above, it is necessary to define technical parameters that have an impact on the environment, for example the level of pollution and noise emission, electricity and water consumption, or stating the minimal involvement of a processed ingredient. In addition the article presents also an account of the life cycle cost of a building from the point of view of environmental criteria constituting an element of selecting the most beneficial offer in the area of competitive tendering.
The subject of this paper is the analysis and evaluation of the reasons for construction costs increases in urban regeneration projects. The analysis considers major refurbishments of real estates', as well as heavy repair and modernization of the road system. For the period mentioned, the costs from works and expenditure schedules were compared with the costs of additional works, which shows the percentage cost increase in relation to initial project budget assumptions of the case study. The analysis revealed that due to difficulties in assessing technical state of inhabited buildings, the investor and potential contractor should pay special attention to the character of issues presented in this paper, taking into account an increased risk of their occurrence.
The aim of the article is to identify factors that determine the development and management models of floating housing development in the analyzed countries. The author indicates factors determining the possibility of settling on bodies of water in Poland, and restrictions connected with this type of development, as well as the need for specialized persons and companies ready to meet the challenges of the modern management of hydro-technical facilities, including floating housing development.
In Western Europe, living on water is gaining in popularity. People have begun to dwell on water because of rising land prices, congestion in cities and work related to the use of rivers for the transport of goods.
The popularity of housing on water in the Netherlands results from environmental conditions. About 60% of the Netherlands is below the sea level. For hundreds of years, the population of the Netherlands has been battling with the elements, while being exposed to continuously rising sea levels, which has been a consequence of the greenhouse effect. Environmental changes have caused a change in government policy, which began to support construction activity on water, adapted regulations and changed office holders.
In North America, especially in the United States, the identification of residents with their neighborhoods of houses on water is so high that it has resulted in the formation of communities uniting owners of residential watercrafts, who have succeeded in homes on water becoming recognized as real estate and, consequently, now have the same rights as residents of houses on land.
In Poland, housing estates on water are slowly gaining popularity but no factors determining the development of this type of settlement have been established. An analysis of the situation in Poland reveals many factors limiting the functional use of houses on water and a lack of specialists in the management of hydro-technical facilities. Therefore, on the basis of examples of countries in Western Europe and North America given in this article, the author tries to define the responsibilities of managers and an appropriate management model for housing estates on water in Poland, as well as indicate problems with the development of housing on water and their possible solutions.
This paper indicates and analyses the use of anchoring systems, such as mooring piles, booms, mooring cables, and deadweight anchors with additional elastic connectors, which are the most frequently applied by the producers of floating houses. The selection of the most advantageous anchoring system is complicated and requires the application of quantitative and qualitative data and methods. This publication presents the results of the calculations using one of the most common methods of multi-criteria analysis of decision-making, namely AHP (analytic hierarchy process). The anchoring system, which is the most beneficial for users, has been indicated with the use of the main criteria such as: cost, time, external risk factors, geospatial factors, and the sub-criteria of the first and second order. Due to the conducted analysis, it has been shown that the most significant factor of the anchoring system selection for the users of floating houses is the investment cost that needs to be borne during the usage, and the most favourable anchoring system is the use of mooring cables.
This publication presents the analysis of three hydrotechnical objects located in the Municipality of Gdańsk with a view of mooring Floating Houses. The assessment of the adaptation of a hydrotechnical object has been carried out by a multi-criteria method AHP and using the main criteria such as: mooring system, communication with the mainland, availability of the utility networks, waste disposal and location of the parking spaces. The analysis allowed to conclude that there are no hydrotechnical objects in Gdańsk, which would be fully adapted to mooring of Floating Houses without additional infrastructure investments. The most adapted site out of the three ones considered in the Municipality of Gdańsk is location no. 1 – the Rybackie Pobrzeże.
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