On grade

on grade

[′ȯn ′grād]
(civil engineering)
At ground level.
Supported directly on the ground.
(metallurgy)
A classification for an alloy indicating that it has a chemical composition within the range of the specified composition limits for that particular alloy. Also known as on composition.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

On grade

A building component placed and supported directly from the ground.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved