Rational building; being a translation of the article "Construction" in the Dictionnaire raisonne ́de l'architecture française of Eugène Emmanuel Viollet-Le-Duc; (1895)
Viollet-le-Duc, Eugène-Emmanuel, 1814-1879 · New York, Macmillan · leaf 40
CHAPTER III. Roman and Romanesque Vaults. WHEN we know the means employed to construct a groined vault, we easily comprehend the reason for the modifi- cation of the Roman groined vault. To make a vault, it requires wooden centres upon which to place the courses. Now to make a Roman groined vault,… … A C meet. Working upon a Fig. 4. quarter-section, and dividing the revolved semicircle into a certain number of equal parts — D E, E F. F G, G B — we let fall perpendiculars from these dividing points, D, E, F, G, upon the diameter A B, prolonging them to meet the
Architecture · Building
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