ASME Y14.100 pdf download Engineering Drawing Practices 4 GENERAL DRAWING PRACTICES This paragraph establishes the essential general requirements for the preparation of engineering draw- ings and associated lists. 4.1 Nonmandatory Appendix B — Noncommercial Drawing Practices Additional requirements for the preparation of engi- neering drawings that are intended for other than com- mercial applications are detailed in Nonmandatory Appendix B....