
A Sleeper Wall is a short wall used to support floor joists of a ground floor. It acts to hold the timber joists away from the potentially damp ground. It is essentially a wall in the way that it is constructed but a sleeper in the way that it functions. Normal construction is of brick either in stretcher bond or, to aid air flow, honeycomb bond. ...
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http://en.wikipedia.org/wiki/Sleeper_wall

A wall to support the ground floor, usually honeycombed in con- struction to provide ventilation.
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http://www.encyclo.co.uk/local/20704

low wall supporting a raised floor, especially in a granary
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https://www.encyclo.co.uk/local/20434

A wall to support the ground floor, usually honeycombed in construction to provide ventilation.
Found on
https://www.encyclo.co.uk/local/20697
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