A treatise on architecture and building construction . Pio. 52,. Fm. sn. the best examples of this arch. S<jmetimes it is hmlt withthe intrados and extradfjs concentric, and also with the 54 MASONRY. 8 intrados having a horseshoe form, and the extrados apointed form. The example given shows the latter methodof construction. At a is shown the center for the horseshoeintrados; at b^ b are the centers for the pointed extrados ofthe arch; c indicates the soffit of the horseshoe arch; d^ theupper side of the arch ring; and e, the voussoirs. In allhorseshoe arches the center is stilted far above
A treatise on architecture and building construction . Pio. 52,. Fm. sn. the best examples of this arch. S<jmetimes it is hmlt withthe intrados and extradfjs concentric, and also with the 54 MASONRY. 8 intrados having a horseshoe form, and the extrados apointed form. The example given shows the latter methodof construction. At a is shown the center for the horseshoeintrados; at b^ b are the centers for the pointed extrados ofthe arch; c indicates the soffit of the horseshoe arch; d^ theupper side of the arch ring; and e, the voussoirs. In allhorseshoe arches the center is stilted far above the spring-ing lines, to produce the required effect. 1)9. Arches having an elliptical or oval form, or pointedin the center and elliptical near the springing joints, areoften used in architectural work. These may be formedeither of true elliptic curves, or of 3 or 5 centered circulararcs. Very flat elliptical arches are not suitable for anyconsiderable span, and, if built, should have large piers orabutments; or beams may be placed above the arch, torelieve i
Size: 1572px × 1589px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, booksubjectarchitecture, booksubjectbuilding
