In a brick arch of concentric rings which is divided in sections, a bond within a section formed through the full depth of the archivolt by a block of bonded brick or by a voussoir inserted at intervals; ties together the concentric rings.
In a brick arch of concentric rings which is divided in sections, a bond within a section formed through the full depth of the archivolt by a block of bonded brick or by a voussoir inserted at intervals; ties together the concentric rings.