blocking-course

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blocking-course.
1. Masonry or brickwork laid on a cornice to hold the latter down, as large projecting cornices are effectively cantilevers, and need weights or forces to anchor them and prevent them from falling.

2. Course of stone or brick forming a projecting band without mouldings at the base of a building, i.e. an unmoulded plinth.

3. Plain band or string-course.