Glossary - Septal Slab

A slab of rock used as to divide a gallery into smaller chambers . Unlike sill stones they are the same height as the gallery and unlike jambs they are full width, thus blocking the appeture completely.

A low stone used to de-lineate the divisions of a gallery. Sill stones fill the width of the space, but do not reach the roof.

Two stones place either side of a gallery, opposite each other, but not touching so as to leave a gap, that are used to segment it into smaller chambers.

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