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Irregular hatching marking undisturbed ground.
Also known as: Ground hatching, Undisturbed earth pattern, Subsoil hatch
On a building section undisturbed earth is shown by irregular hatching below the ground line, distinguishing natural ground from made-up fill or construction.
Marks undisturbed natural ground on a section drawing.
Contexts: Technical drawing
Is distinguished from made-up ground, which carries a different pattern, because the difference determines what a foundation can bear on.
Contexts: Technical drawing
Irregularly spaced short diagonal strokes filling the area below the ground line.