K původu a rozšíření nůžkových krovů ve střední Evropě

Roof frames on village buildings with principal rafters crossed under the roof head to carry the ridged piece are termed scissor truss in Central-European languages. The authors focus on their origin, structural function and constructional arrangement in relation to other types of roof frame constructions most frequently appearing in vernacular architecture, in particular to ridge post roofs, purlin roofs and common rafter roofs. The field and archive research, along with dendrochronological dating, in the Znojemsko and Vranovsko regions was compared with those from the Slovakian part of the Danube Region. The results shows that the geographical spreading of principal rafter roofs does not always mean the spreading of a genetically identical phenomenon. Principal rafter roofs in both surveyed regions have their specific features and their genesis is not identical. In the roofs in the Danube Region the post supports of the ridge piece were gradually improved and replaced by principal rafters providing better weight displacement, whereas the constructions widespread in the region along the Dyje River likely witnessed the reception of a finished type of construction applied firstly to nobility houses and then adapted to the needs of residential and farm buildings in villages.