780.
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The Da Vinci Notebooks at sacred-texts.com
780.
ON THE STRENGTH OF THE ARCH.
The way to give stability to the arch is to fill the spandrils with good masonry up to the level of its summit.
ON THE LOADING OF ROUND ARCHES.
ON THE PROPER MANNER OF LOADING THE POINTED ARCH.
ON THE EVIL EFFECTS OF LOADING THE POINTED ARCH DIRECTLY ABOVE ITS CROWN.
p. 88
ON THE DAMAGE DONE TO THE POINTED ARCH BY THROWING THE PRESSURE ON THE FLANKS.
An arch of small curve is safe in itself, but if it be heavily charged, it is necessary to strengthen the flanks well. An arch of a very large curve is weak in itself, and stronger if it be charged, and will do little harm to its abutments, and its places of giving way are o p.
Footnotes
88:404 : Inside the large figure on the righi is the note: Da pesare la forza dell' archo.
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