nog

A wooden block, the size of a brick, built into a wall, as a hold for the nails of woodwork.

Within a wall,[…], we find vertical studs, nogs or blocking, top and bottom plates, perhaps some form of diagonal braces, and many nailed and screwed connections.

One of the square logs of wood used in a pile to support the roof of a mine.

nogs and chocks are used to support the roof where waste material can not conveniently be obtained

A treenail to fasten the shores.

to fill in, as between scantling, with brickwork.

to fasten, as shores, with treenails.

Short for noggin.