. Medieval architecture, its origins and development, with lists of monuments and bibliographies. X2iJd\c: b =, b c/d. III. 6. —Diagram of tlie Arch and Flat Arch opening by means of several blocks of stone, when for any rea-son it is undesirable to employ a lintel or a wooden the illustration (111. 6) it will be seen that these blocks, The arch at Bet Khallaf, Egjpt (xxx centurj ), is the earliest dated example I know. 12 THE ARCH or voussoirs, as they are called, — a, b, c, d, — are fitted in sucha manner that the central voussoir (the keystone, a) cannot fallto the gro
. Medieval architecture, its origins and development, with lists of monuments and bibliographies. X2iJd\c: b =, b c/d. III. 6. —Diagram of tlie Arch and Flat Arch opening by means of several blocks of stone, when for any rea-son it is undesirable to employ a lintel or a wooden the illustration (111. 6) it will be seen that these blocks, The arch at Bet Khallaf, Egjpt (xxx centurj ), is the earliest dated example I know. 12 THE ARCH or voussoirs, as they are called, — a, b, c, d, — are fitted in sucha manner that the central voussoir (the keystone, a) cannot fallto the ground without first shoving to one side the adjacentvoussoir h. B in its turn tends to push out c, and so the forcewhich at a had been merely dead weight, pressing straighttowards the ground, is changed in direction, and at x becomesa side ihrusf, tending to disrupt the arch laterally, in the direc-tion indicated by the arrow. If, then, a heavy mass of masonrybe built against the arch at the point x, so as to prevent the vous-soirs c and d from being forced out laterally, an almost unlimitedweight may be safe
Size: 1473px × 1696px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecad, booksubjectarchitecture, bookyear1912
