For a given 2D print, is it recommended to number section views and details views with the same alphabetical list, i.e. Section views A,B and C followed by detail views D, E and F,

or go with different alphabetical list, i.e. Section views, A, B and C, followed by detail views, A, B and C?


1 Answer 1


Your first suggestion is correct - there should not be two different views (of any type) with the same letter on any one drawing.

See the quote below from ASME Y14.3-2003

1.7.3 Identifying Removed Views. To relate the viewing plane or cutting plane to its removed view, capital letters such as A, B, C, etc., are placed near each arrowhead. The corresponding removed views are identified as VIEW A-A, VIEW B-B, VIEW C-C, etc. View letters should be used in alphabetical order excluding I, O, Q, S, X, and Z. When the alphabet is exhausted, additional removed views shall be identified by double letters in alphabetical order, as in AA-AA, AB-AB, AC-AC, etc.

This applies to all "Removed Views", of any type. I, O, Q, S, X, and Z are all excluded due to their visual similarity to 1, 0, 0, 5, [blank that needs filling in], and 2, respectively.

  • $\begingroup$ Thank you for your answer. Really appreciate you providing a source with it. $\endgroup$
    – HotFuzz
    Mar 20, 2018 at 15:57

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