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1

The reasons for differences in calculations in investor’s and contractor’s estimations

100%

Zima K.

Czasopismo Techniczne

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PL

The occurrence of differences between the employer’s estimate and the bid quotation is widespread and difficult to avoid. The differences between the investor’s and contractor’s calculations are often quite significant. This article analyses the differences between the value of the contract and the bid submitted for construction work carried out on a multi-storey buildings in 2013. An attempt was also made to analyse the reasons for such differences, providing possible ways to solve the problem.

2

Characteristic of the most commonly used construction work systematics in the world

100%

Zima K.

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PL

In Poland, most noticeable is the lack of a widely used systematic of construction works for the classifying and systematizing works. Such a systematic should be used in order to facilitate cost estimation and quantity takeoff comparisons and to show the relationship between the technical documentation and cost studies. Such systematic may allow for classification of construction works, elements and materials in each phase of construction investment. The article presents the idea and characterizes shortly the world’s most widely used construction works systematics. A comparison of selected systematics was made. It was also shown an example of selected systematics.

3

Analysis of a passive design sports hall: construction and use

63%

Furmanek M., Zima K.

Czasopismo Techniczne

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PL

This article presents an analysis of how the construction and insulation materials used for the walls of a sports hall built according to passive design affect the overall construction costs. The authors also attempt to answer whether the objective of achieving the lowest possible energy consumption in a building is actually economically sound. Cost analyses will be carried out to this end, the optimum insulation thickness will be determined, and the time necessary to balance the investment expenditure will be calculated for an energy-efficient construction project.

4

Analysis of solutions for exterior walls in the bim model using the ahp method

63%

Jończyk A., Zima K.

Czasopismo Techniczne

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PL

This paper presents selected variants of thermal insulation for external walls of single family homes. The main aim of this article is to analyze the technological and economical solutions based on the BIM model. The technical and economic analysis concerns the calculation and evaluation of both the costs of constructing the walls and the energy demand of the model building designed by the authors. The last part of the paper compares and prioritises proposed solutions in regard to the accepted assessment criteria using the AHP method, which allows for selecting the best solution.

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4 Czasopismo Techniczne

2 2016

2 2015

4 Zima K.

1 Furmanek M.

1 Jończyk A.

The reasons for differences in calculations in investor’s and contractor’s estimations

Characteristic of the most commonly used construction work systematics in the world

Analysis of a passive design sports hall: construction and use

Analysis of solutions for exterior walls in the bim model using the ahp method