Voussoir

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Related to voussoirs: intrados

Voussoir

A wedge-shaped block whose converging sides radiate from a center forming an element of an arch or vaulted ceiling.

stepped voussoir

A voussoir that is squared along its upper surfaces so that it fits horizontal courses of masonry units.

voussoir

A wedge-shaped masonry unit in an arch or vault whose converging sides are cut as radii of one of the centers of the arch or vault.
References in periodicals archive ?
One thinks of Giulio Romano's slipping voussoirs at Mantua.' The risky game that Stirling plays is clearly Mannerism, although Summerson, like Eisenman, does not use the word.
Huge stone copings on the top of the bridge, the dressed stones over the arches (known as voussoirs) and the remains of cast iron rope rollers which allowed boat tow ropes to run smoothly through the bridge back in the days when freight barges were pulled by horse are to be included in the new bridge.
"On the masonry arches the keystone and the voussoirs on the arch have opened up showing some significant gaps which is common with movement in the bridge."
It is not denied that railway buffers have their uses when properly applied to rolling stock, but they are not things of beauty, and are out of place on the voussoirs of an arch.
These include the huge stone copings on the top of the bridge, the dressed stones over the arches (known as voussoirs) and the remains of cast iron rope rollers which allowed boat tow ropes to run smoothly through the bridge back in the days when freight barges were pulled by horse.