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The energy-efficient buildings construction requires careful consideration of the building external structures heat loss possible causes. One of the reasons for heat loss is the cold bridges presence in the building external circuit. This article discusses the material cold bridges causes, i.e. energy leakage through more conductive materials. Some analysis methods of cold bridges and possible methods of their elimination are considered. The main attention is paid to the automated search for cold bridges at the building design stage using BIM technologies. It is proposed to analyze the building information model data, using the geometric objects finding collisions method. The algorithm includes the building elements determination that crosses the building thermal contour and such elements materials analysis for their ability to heat transfer. The advantages and limitations of the proposed method are discussed.

Search for Cold Bridges Based on the Building Information Model Collisions Analysis