Drafting Standards and the Genium Drafting Manual

ASME Y14.24 – 1999, Types and Applications of Engineering Drawings

ASME Y14.24 is part of a composite set. In addition to Y14.24, this set contains ASME Y14.100, ASME Y14.34M, and ASME Y14.35M. Y14.24 is a relatively new standard, originally released in 1989. The importance of this standard to drafters is to provide examples of drawing types accompanied by the required text. This is particularly important for DoD and government work.

The Genium Drafting Manual contains numerous examples accompanied by the required text. Particular attention is paid to compliance with Y14.24. However, remember that the purpose of this standard is to spell out drafting requirements, the drawing itself generally relates to topics covered in other drafting standards. So what you have in the Genium Drafting Manual are drawings that cover a specific topic (standard related) done in accordance with Y14.24 (a second drawing standard). With the exception of one specific section in the Genium Drafting Manual, Y14.24 is covered in conjunction with other standards. Later in this paper we will point out specific topics in the Genium Drafting Manual that are especially relevant to Y14.24. However, let’s first take a closer look at some of the history of this Standard so that you will have a better idea of why it came into existence.

The subcommittee for Types and Application of Engineering Drawings, representing a cross section of United States industry and the Department of Defense (DoD), was formed in June 1973. Its goal was to prepare a standard that defines the accepted drawing types used to establish engineering requirements in the production and procurement of hardware.

The basis of Y14.24 was MIL-STD-100, Chapter 200, Engineering Drawing Practices. The subcommittee considered the types of engineering drawings most frequently used by business, industry, and the government for the purpose of assuring consistency of application and interpretation. They then choose proper drawing examples and wrote the appropriate text. Technical support was provided by liaisons from technical societies such as the National Defense Industrial Association (NOIA) [formerly known as the American Defense Preparedness Association (ADPA)], Aerospace Industries Association (AIA), Electronic Industries of America (EIA), and the Society of Automotive Engineers (SAE).

Drawing definitions are intended to permit preparation by any suitable method such as manual, CAD, photographic, etc. and methods of reproduction are not described. The original edition of this Standard was approved as an American National Standard on November 3, 1989 and adopted by the DoD on March 30, 1990, replacing MIL-STD-100E, Chapter 200, September 30, 1991.

This Standard was reaffirmed in 1996 without change. The latest revision is 1999. It contains the following changes:

1. Added “Inseparable Assembly Drawing”.
2. Added information concerning the structure of drawing text.
3. Deleted “Design Control Drawing” and replaced it with “Envelope Drawing”.
4. Changed the name “Vendor Item Drawing” to “Vendor Item Control Drawing”.
5. Changed the name “Interface Control Drawing” to “Interface Drawing”.
6. Minimized the information and detail on Printed Board Drawing Sets and Microcircuit Drawing, and referenced applicable IPC standards for documentation requirements. This was done to eliminate duplication of effort between ASME and IPC.
7. Deleted the detail requirements and drawing figures for Wiring List.
8. Replaced “Computer Program/Software Drawings” with “Software Installation Drawing” and “Altered Item Drawing”.
9. Added “Design Parameters Drawing”.

Section 5.6 (Types and Application of Engineering Drawings) is the primary section in the Genium Drafting Manual addressing Y14.24. This section covers the following drawing types and includes appropriate engineering drawing examples.

1. Layout Drawing
2. Monodetail Drawing
3. Multidetail Drawing
4. Assembly Drawing
5. Inseparable Assembly Drawing
6. Installation Drawing
7. Altered Item Drawing
8. Selected Item Drawing
9. Modifying Drawing
10. Arrangement Drawing
11. Control Drawings
    • Procurement Control Drawing
    • Vendor Item Control Drawing
    • Source Control Drawing
12. Envelope Drawing
13. Interface Drawing
14. Identification Cross-reference Drawing
15. Mechanical Schematic Drawing
16. Electrical/Electronic Drawings
    • Functional Block Diagram
    • Single Line Schematic Diagram
    • Schematic Diagram or Circuit Diagram
    • Connection Diagram
    • Interconnection Diagram
    • Logic Circuit Diagram
    • Wiring Harness Drawing
    • Cable Assembly Drawing
17. Undimensioned Drawing
18. Kit Drawing
19. Tube Bend Drawing
20. Matched Set Drawing
21. Contour Definition Drawing
22. Software Installation Drawing
23. Design Parameters Drawing

Other sections of the Genium Drafting Manual that have particular importance for drafters trying to understand and apply ASME Y14.24 are: