ASME AED-1:2018 pdf download

ASME AED-1:2018 pdf download.Aerospace and Advanced Engineering Drawings
1 GENERAL
1.1 Scope
This Standard provides a method to document requirements that are common across aerospace and other industries thatuseadvancedmanufacturingtechnologies.ThisStandardofferssymbologies,terminologies,andconceptstoenhance the understanding and abilities of those who create and use design documentation.
1.2 Conventions
The conventions in paras. 1.2.1 through 1.2.10 are used in this Standard. With the exception of the system of units described in para. 1.2.7, these conventions are similar to the conventions used in the ASME Y14 standards. 1.2.1 Mandatory, Nonmandatory, Guidance, and Optional Words (a) The words “shall” and “will” establish a mandatory requirement. (b) The words “should” and “may” establish a recommended practice. (c) The words “typical,” “example,” “for reference,” and the Latin abbreviation “e.g.” indicate suggestions given for guidance only. (d) The word “or” used in conjunction with a mandatoryrequirementora recommended practice indicates thatthere are two or more options on how to comply with the stated requirement. 1.2.2 Cross-Reference ofStandards. Cross-reference ofstandards in text with or without a date following the stan- dard designator shall be interpreted as follows: (a) Reference to ASME Y14 standards in the text without a date following the standard designator indicates that the issue of the standard identified in the References section (section 2) shall be used to meet the requirement. (b) Reference to ASME Y14 standards in the textwith a date followingthe standard designatorindicates thatonlythat issue of the standard shall be used to meet the requirement.1.2.3 Invocation ofReferenced Standards. Thefollowingexamples definetheinvocationofastandardwhenspecified in the References section (section 2) and referenced in the text of this Standard: (a) When a reference standard is cited in the text with no limitations to a specific subject or paragraph(s) of the standard, the entire standard is invoked, e.g.,“Dimensioning and tolerancing shall be in accordance with ASME Y14.5” is invoking the complete standard because the subject of the standard is dimensioning and tolerancing and no specific subject or paragraph(s) within the standard are invoked. (b) Whenareferencedstandardiscitedinthetextwithlimitationstoaspecificsubjectorparagraph(s) ofthestandard, only the paragraph(s) on that subject are invoked, e.g., “Assign part or identifying numbers in accordance with ASME Y14.100” is invoking only the paragraph(s) on part or identifying numbers because the subject ofthe standard is engi- neering drawing practices, and part or identifying numbers is a specific subject within the standard. (c) When a reference standard is cited in the text without an invoking statement such as “in accordance with,” the standard is for guidance only; e.g., “For gaging principles, see ASME Y14.43” is for guidance only, and no portion ofthe standard is invoked. 1.2.4 Parentheses Following aDefinition. When a definition is followed bya standard referenced in parentheses, the standard referenced in parentheses is the source for the definition. 1.2.5 Notes. Notes depicted in this Standard in ALL UPPERCASE letters are intended to reflectactual drawingentries. Notes depicted in initial uppercase or lowercase letters are to be considered supporting data to the contents of this Standardandarenotintendedforliteralentryondrawings. Astatementrequiringtheadditionofanotewiththequalifier “such as” is a requirement to add a note, and the content of the text is allowed to vary to suit the application.1.2.8 Figures. The figures in this Standard are intended only as illustrations to aid the user in understanding the practices described in the text. In some cases, figures showa level ofdetail as needed foremphasis. In othercases, figures are incomplete by intent so as to illustrate a concept or facet thereof. The absence of figure(s) has no bearing on the applicability ofthe stated requirements or practice. To comply with the requirements ofthis Standard, actual data sets shall meetthe contentrequirements setforth in the text. To assistthe userofthis Standard, a listofthe paragraph(s) that refertoanillustrationappearsinthelowerright-handcornerofeachfigure.This listmaynotbeall-inclusive.Theabsence of a list is not a reason to assume inapplicability. A lowercase “h” is used in figures for letter height or for symbol proportions (see Figure 1-1). Select the applicable letter height in accordance with ASME Y14.2.