skewback

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skewback

skew·back

 (skyo͞o′băk′)
n.
Either of two inset abutments sloped to support an arch.

skewback

(ˈskjuːˌbæk)
n
1. (Architecture) the sloping surface on both sides of a segmental arch that takes the thrust
2. (Architecture) one or more stones that provide such a surface
ˈskewˌbacked adj

skew•back

(ˈskyuˌbæk)

n.
a sloping surface against which the end of an arch rests.
[1695–1705]
References in periodicals archive ?
Since they're curved, the arches transfer the load down along each arch to the skewbacks, where the arches and canyon walls meet (see photo, pages 12-13).
Starting at the skewbacks, construction workers on either side poured concrete in 8 m (25 ft) sections.
Skewbacks and ornate cast-iron grilles, which had been covered with plastic and acoustic ceiling tiles over the years, were also exposed.