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2022
It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.
The article reveals the issues of the development of large-span structures in the architecture of the mid-19th and early 20th centuries. Structural systems used in the construction of these structures are considered and analyzed on the example of the unique objects of the first world exhibitions, as well as large shopping passages. This confirms that the use of large-span structures affects the rapid development of the architecture of unique buildings and structures.