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CAD standardsFrom Wikipedia, the free encyclopedia

CAD Standards are a set of guidelines for the way Computer­aided design (CAD) drawings shouldappear, to improve productivity and interchange of CAD documents between different offices and CADprograms, especially in architecture and engineering.

Contents

1 AEC (Architecture Engineering and Construction) standards1.1 CAD layer standards1.2 Line­thickness1.3 Text and dimension1.4 Scales1.5 File naming standards

2 MCAD (Mechanical) standards2.1 Geometric Dimensioning and Tolerancing2.2 Geometry quality

3 Product Data Quality4 See also5 References6 External links

AEC (Architecture Engineering and Construction) standards

CAD layer standards

Most common:

BS­1192, which relies heavily on the Code of Procedure for the Construction IndustryAIA Cad Layer Guidelines, 2nd edition (1997), has a great usage in the USA;ISO 13567­1/3, International standard, common in Northern Europe;AEC (UK) (http://aecuk.wordpress.com/), an adaptation of BS­1192 based on Uniclass.A/E/C CAD Standard, Tri­service (USACE/Air Force/NAVFAC) CAD standardcreated/maintained by the CAD/BIM Technology Center for Facilities, Infrastructure, and

Environment..][1]

SIA 2014 (1996), Swiss standard for engineers and architects, based on ISO 13567.ÖNORM A 6240­4 (2012), Austrian standard for digital documentation in technical drawings,based on ISO 13567.

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Samples of standardised layers:

A­B374­­E­ (ISO13567: agent Architect, element Roof window in SfB, presentation graphicelement);A­37420­T2N01B113B23pro (ISO13567: agent Architect, element Roof Window in SfB,presentation Text#2, New part, floor 01, block B1, phase 1, projection 3D, scale 1:5(B), workpackage 23 and user definition "pro");A­G25­­­D­R (ISO13567: agent Architect, element wall in Uniclass, presentation dimensions,status Existing to be removed);A­G251­G­WallExtl­Fwd (AEC(UK): agent Architect, element External Wall in Uniclass,presentation graphic element, user definition "WallExtl" and view Forward);A210_M_ExtWall (BS1192: agent Architect, element External Wall in SfB, presentation model,user definition "ExtWall");A­E04­­­E­ (ISO13567 SIA 2014: agent Architect, element Stair in SIA classification,presentation graphic element);A­WALL­FULL (AIA: agent Architect, element Wall, Full height).

Line­thickness

Thickness for pens and plot: 0,13 mm Gray, 0,18 mm Red, 0,25 mm White, 0,35 mm Yellow, 0,50 mmMagenta, 0,70 mm Blue, 1,00 mm Green. In AutoCAD usually parts to be printed in black are drawn in 1to 7 basic colors. Color layer: Green­Center, Magenta­Measure of length and Blue­Hidden.

Description Line thickness in mm Color CodesOut Line 0.20 or 0.25 White, Cyan, Yellow,BlueHidden Line 0.00 or 0.05 Blue, Gray, 241Center Line 0.10 or 0.15 Green, RedNote 0.18 or 0.20 Cyan, Green, 41Thin Line 0.00 or 0.05 Gray, 08, 111Reference Line 0.000 Magenta, GrayHatch Line 0.000 Magenta, Green, Gray,redColor­9 to 256 0.000

Dimension lineLeader Line with Arrows 0.000 Gray Color­9,or 8, RedText 0.18 or 0.20 Cyan, Green,

Text and dimension

Heights: 2,5 mm, 3,5 mm, 5,0 mm, 7,0 mm (stroke thickness (lineweight) should be 0.1 of the characterheight). Font styles: "Romans.shx ­ Romantic Simplex", "ISOCPEUR.ttf". Exceptional use of screenfonts (arial, Times New Roman etc.).

Scales

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1:1, 1:10, 1:100 ....1:2, 1:20, 1:200 ....1:5, 1:50, 1:500 ....1/8=1'­0"; 3/16"=1'­0", 1/4"=1'­0", 3/8"=1'­0", 1/2"=1'­0", 3/4"=1'­0", 1"=1'­0" 1/1111111

File naming standards

BS 1192:

Discipline (1 char), Element (2 char, using SfB Table 1 or Uniclass), Drawing type (1 char,P=preliminary, X=special/xref, L=layout, C=component, S=schedules, A=assembly drawings, K=co­ordination drawing), Unique number (3 char), Revision (1 char, A=emission, B,C,D...= revisions).Samples: A22P012G.dwg (architect, internal walls in SfB, preliminary design, sheet 012, revision G).

AIAAEC

Samples: ZE1G­124.dwg, XE1G­100.dwg

AEC (UK)

Project (unlimited char), Discipline (2 char max, recommended mandatory), Zone (optional), View (1char, rec.mand.), Level (2 char, rec.mand.), Content (rec.mand.), Sequential number (up to 3 char);Samples: 1234­A­Off­P­M1­Furn­11c.dwg (project #1234, architect, office zone, plan, mezzanine 1,furnitures, version 1.1 revision c), A­P­01­Part (architect, plan, 1st floor, partitions), 1234­A­S­055.dgn(project #1234, architect, section, sheet 055), A­S­xx­AA.dwg (architect, section, full building, sectionAA), A­P­x­Grid.dgn (architect, plan, all floor, grid), 1838­S­C­P­03 (project 1838, structures, buildingC, plan, 3rd floor).

Other local:

Job number (4 char), Agent (1 char), Section (4 char), phase (1 char), sheet number (2 char), revision (2char) Samples: 0512­A­00A_­1­01­02.dwg Job number (3 char), View (2 char), section (2char), phase (1char), revision (1 char) Samples: 123p0s2d0.dwg (job 1239, plan, 2nd floor, definitive drawing,emission), 459s0BBD0.dgn (job 123, section B, definitive drawing, emission).

MCAD (Mechanical) standards

Geometric Dimensioning and Tolerancing

Industry standards for defining Product Manufacturing Information (PMI), a 3D extension of GeometricDimensioning and Tolerancing (GD&T), include ASME Y14.41­2003 Product Data Definition and ISO1101 Representation of specifications in the form of a 3D model. ..

Geometry quality

VDA 4955

Product Data Quality

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PDQ is a field of PLM relating to the quality of product data, particularly the geometrical andorganizational quality of CAD data. Checkers, software that analyze CAD data formats, are oftenemployed before and after data translation. The checkers can check the organization and quality of thedata against internal company standards and international or industry standards. These checkers can bebuilt into specific CAD packages or work on a number of CAD file formats.

In 2006/2007 Part 59 of STEP ISO 10303­59 Product data representation and exchange: Integratedgeneric resource: Quality of product shape data is under development. It defines how to representquality criteria together with measurement requirements and representation of inspection results.

See also

Model based definitionConstruction Project Information CommitteeUniclassISO Standards Handbook ­ Technical drawings, a broad collection of all basic ISO drawingstandards

Vol.1 Technical drawings in general, ISBN 92­67­10370­9Vol.2 Mechanical engineering drawings, construction drawings, drawing equipment, ISBN92­67­10371­7

ISO 128 Technical drawings—General principles of presentationISO 13567 Technical product documentation ­ Organization and naming of layers for CADISO 16792 Technical product documentation — Digital product definition data practices, for thepresentation of 3D models and GD&TASTM F2915 Additive Manufacturing File FormatIGES Initial Graphics Exchange SpecificationKiziltas, S.; Leite, F.; Akinci, F.; Lipman, R. (2009) “Interoperable Methodologies andTechniques in CAD”. Chapter 4. In: CAD and GIS Integration. Karimi, H.; Akinci, B. (ed.).Taylor & Francis. p. 73­110.X3D ISO standardized royalty free 3D format ­ CAD Interchange sub­component of interest here.

References

1. ^ A/E/C CADD Standard R4.0 (https://cadbim.usace.army.mil/CAD) July 2009.

External links

AutoCAD Layer Names for Architecture / Interiors(http://web.archive.org/web/20080821202559/http://books.dougseidler.com/downloads/autocad_standard_layer_name.asp) (PDF available)aec­uk.org (http://www.aec­uk.org/) Home of the AEC(UK) standards.EatyourCAD (http://eatyourcad.com/) CAD Manager site containing guides on implementation of

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AEC(UK)CAD Standard plus downloads of ready to use standards ­ search for tag AEC.

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Categories: CAD file formats Product lifecycle management

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