Div. B › Part 9 › 9.20 › 9.20.12 — Corbelling

9.20.12.1 — Corbelling

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(1) All corbelling shall consist of solid masonry units.

(2) The units referred to in Sentence (1) shall be corbelled so that the horizontal projection of any unit does not exceed 25 mm and the total projection does not exceed one-third of the total wall thickness.

OBC Definitions

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solid masonry

means a single-wythe or multi-wythe construction made of solid masonry units or semi-solid, cored or hollow masonry units, the cells of which may or may not be filled with mortar or grout. In multi-wythe masonry construction, the space between the wythes consists of a mortar-filled collar joint or grout-filled space and the wythes may or may not be constructed of the same masonry materials.

solid masonry unit

means a concrete block or brick unit, a clay brick unit or a calcium silicate brick unit, the net solid area of which is at least 75% of its gross area.

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