Summary THIS STANDARD ESTABLISHES UNIFORM PRACTICES FOR STATING AND INTERPRETING DIMENSIONING, TOLERANCING, AND RELATED REQUIREMENTS FOR USE ON ENGINEERING DRAWINGS AND IN RELATED DOCUMENTS. FOR A MATHEMATICAL EXPLANATION OF MANY OF THE PRINCIPLES IN THIS STANDARD, SEE ASME Y14.5.1M. PRACTICES UNIQUE TO ARCHITECTURAL AND CIVIL ENGINEERING, LAND, WELDING SYMBOLOGY ARE NOT INCLUDED.