Arch

| View Cart ⇗ | Info

“The blocks, which are technically known as voussoirs, should be of a wedge shape, the center or top block being the keystone A; the lower blocks B B which rest on the supporting pier are the springers, the upper surface of which is called the skewback, C C; the side blocks, as D, are termed the hauches. The lower surface or soffit of the arch is the intrados, E, and the upper surface the entrados, F. The rise of the arch is the distance from the springing to the soffit, G, the width between the springers is called the span, H, and the radius I. The triangular spaces between the arches are termed spandrils, K.” — The Encyclopedia Britannica, 1910

Galleries

Arches

Source

The Encyclopedia Britannica, Eleventh Edition (New York: The Encyclopedia Britannica Company, 1910)II:342

Downloads

TIFF (full resolution)

2400×1146, 186.1 KiB

Large GIF

1024×488, 31.3 KiB

Medium GIF

640×305, 17.7 KiB

Small GIF

320×152, 7.9 KiB