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The beveled or inclined support at each end of a segmental arch.
The sloping surface of a member that receives the component materials of an arch.
1. The sloping surface of an abutment which receives the thrust of an arch.
2. The stone, or course of stones, or steel plate, providing such a sloping surface.
springer, skewback, summer
1. The impost or place where the vertical support for an arch