Definitions for "Grade beam"
A foundation wall that is poured @ level with or just below the grade of the earth (e.g., the area where the 8' or 16' overhead garage door "block out" is located, or a lower (walk out basement) foundation wall is poured)
A reinforced concrete beam that transmits the load from a bearing wall into spaced foundations such as pile caps or caisons.
A concrete beam around the perimeter of a building.