Design Guidelines and Standards CAD Standards June 2004 Office of the University Architect Construction Management P.O. Box 210181 Cincinnati, Ohio 45221-0181
Table of Contents Contents CAD STANDARDS Introduction... 4 Drawing File Format... 4 External Reference Files 5 File Numbering Conventions... 5 CAD Layering Convention... 6 CAD Layering Convention... 7 Drawing Standards and Settings... 8 Text Fonts 8 Entity Properties 8 Scale and Units 8 Dimensions 8 Tolerances 8 Room Numbering Guidelines... 9 Preliminary Room Numbers 9 Final Room Numbers 9 Subsequent Room Number Changes 9 Record Drawing Files... 10 Quality Assurance Audit... 10 Illustrations Figure 1 Figure 2 Electronic File Numbering Convention External Reference File (xref) File Numbering Convention DESIGN GUIDELINES AND STANDARDS 2
Table of Contents Appendices A B C D University Drawing Numbering System University CAD Layering System University Standard Details (in development) University Standard Symbols and Abbreviations (in development) Acronyms and Abbreviations ADT R2 AIA CAD CP&D OUA SM AutoCAD 2000 (including Architectural Desktop) American Institute of Architects Computer-Aided Design Department of Campus Planning and Design Office of the University Architect Department of Space Management DESIGN GUIDELINES AND STANDARDS 3
CAD STANDARDS INTRODUCTION The intent of these CAD Standards is to provide a means for consistent graphics management on all projects under the responsibility of the Office of the University Architect (OUA), University of Cincinnati. This document has been approved as the official reference for determining the graphical display, symbology, and electronic file management conventions to be used on all OUA projects. These standards are designed to help OUA designers communicate requirements to clients, contractors, consultants, and others involved in project document preparation, project coordination, and construction. These standards were developed using research from similar institutions, industry professionals, and the U.S. National CAD Standards. They are maintained with the full support of OUA management. Please note that these standards will be periodically revised and updated to stay current with changing technology, University policies, and construction practices. Comments are welcome and may be directed to the individuals listed below. Michael Ross, Senior CAD Technician (513) 556-0909 AutoCAD/Plan Room Manager David Galusha, CAD Technician (513) 556-1501 AutoCAD Support Ralph Jacob, Senior Staff Architect (513) 556-3162 AutoCAD Work Team Leader DRAWING FILE FORMAT The CAD software currently used at the University of Cincinnati is AutoCAD 2000 including Architectural Desktop (ADT R2). All projects prepared for the University must be submitted in a compatible.dwg format. If you experience difficulty accessing ADT R2, please contact the Senior CAD Technician (listed in the Introduction). All projects developed for the University shall begin with the current standard prototype drawing file, submitted by the University Project Administrator. (Exceptions that allow the use of consultant-generated title blocks will be allowed only with the written permission of the University Project Administrator.) This electronic AutoCAD file is formatted to the layers, settings, and defaults specified in these standards. If you require assistance with any of these files, please contact the Senior CAD Technician. DESIGN GUIDELINES AND STANDARDS 4
Recent releases of University prototype AutoCAD drawing files include tabs for modelspace and paperspace. The title block information is located on the paperspace tab. It is an absolute requirement that all graphic design be produced at full scale in modelspace. Projects created otherwise will be returned for correction. External Reference Files Projects requiring cooperation among different disciplines must use a common base plan as an external reference file (xref). Such a file provides a single referenced plan that can be revised simultaneously for all disciplines. Changes and updates during design are made to only one background plan (the base plan), which becomes the basis for updating all drawings. This method, which is a requirement for all construction drawings at the University, will help ensure consistency throughout all disciplines. When creating external reference files: Begin all xref file names with XREF. Use BYLAYER. Purge before providing to other disciplines. Include all graphic elements. Include room numbers. Do not include dimensions, notes, or wall types. Insert at 0, 0. FILE NUMBERING CONVENTIONS All electronic CAD files must have a nine- or ten-character file number consisting of two parts. The first five or six characters (xxxxx in Figure 1) make up the first part of the file number and represent the UC project number. The Project Administrator will provide the consultant with the project number at the beginning of any project. The second part of the file number consists of four alphanumeric characters (D-nnn), representing the drawing number as it occurs in the completed drawing title block (see Appendix A, University Drawing Numbering System). This drawing number will include a letter (D) representing the drawing discipline followed by a dash and a three-digit (nnn) sequential drawing number. Figure 1 shows the file numbering convention; Figure 2 illustrates the file numbering convention for xref files. DESIGN GUIDELINES AND STANDARDS 5
xxxxx-d-nnn Project Number Drawing Number Drawing Discipline Drawing Disciplines Number Series A Architectural 000 Notes and Symbols C Civil 001-099 Existing/Demolition Plans E Electrical 101-199 Proposed Plans F Fire Protection 201-299 Elevations G General (as required) 301-399 Sections L Landscaping 401-499 Enlarged Plans M Mechanical 501-599 Details and Diagrams P Plumbing 601-699 Schedules Q Equipment/Furnishings S Structural T Telecommunications Figure 1: Electronic File Numbering Convention Begin all external reference drawings with this term. XREF-xxxxx Project Number Figure 2: External Reference File (xref) Numbering Convention DESIGN GUIDELINES AND STANDARDS 6
CAD LAYERING CONVENTION OUA s standards for layering follow the American Institute of Architects (AIA) CAD Layer Guidelines, with some modifications. 1 The layer guidelines are organized as a hierarchy. This structure makes the list easier to use and accommodates future expansion. Layer names are alphanumeric and use easy-to-remember abbreviations. The layer disciplines shown below match the drawing discipline designations for electronic file identification. A Architectural M Mechanical C Civil P Pl umbing E Electrical Q Equipment/Furnishings F Fire Protection S Structural G General T Telecommunications L Landscaping These layer disciplines will be followed by a select number of layer names from the full AIA Layer Guidelines. Each of these layer names will then be further delineated by the modifiers "DEMO," "EXST," and "NEW" to identify construction to be removed, existing to remain, and new work to be executed. Example: A-FURN-NEW Discipline - A (do not change) Layer - FURN (do not change) Modifier - NEW (may be changed) New Sub-Layers: A-FURN-MOVE A-FURN-NEW-MOVE If new layers are required, new modifiers may be used to create new sub-layers of the existing layer scheme. When the project is closed out and record CAD files are presented to the University, the files should be such that a minimal amount of time will be required to modify the layers so that they can be stored as part of a consistent format. See Record Drawing Files in this document, and Appendix B, University CAD Layering System. 1 Copies of the CAD Layer Guidelines are available through the American Institute of Architects Press, 1735 New York Avenue NW, Washington, D.C., 20006. DESIGN GUIDELINES AND STANDARDS 7
DRAWING STANDARDS AND SETTINGS The following settings have been established and included in the University prototype drawings. If files received from consultants are not in the following format, final closeout of the project may be delayed until the files have been modified to conform to these standards. Text Fonts All text in submitted CAD documentation should use the Simplex or Arial font. Plotted size of text for room names, dimensions, and notes should be 3/32 inch high. Plot size of text for plan and detail titles should be 1/4 inch high. The intent is to provide legible text when documents are reduced to 50 percent. The use of non-standard AutoCAD text fonts is not acceptable. Entity Properties The attributes (color, line type, and line width) for all layers should be set to BYLAYER. The use of non-standard AutoCAD line types is not acceptable. Scale and Units Scale of drawings (or individual views on drawings) must be as indicated by the scale of that drawing or view. The use of scale factors to increase or decrease the size of drawing elements is not acceptable. Different drawing scales shall be permitted only by means of the file viewport. Plotted drawings must be directly scaleable without requiring the application of a scale factor. Graphic scales should be included for every plan, elevation, section, and detail. Dimensions Associative dimensions shall be used for drawings at all scales. Tolerances Tolerances for acceptable CAD documentation are as defined in the Quality Assurance Audit section of this document, which addresses completeness of recording features, accuracy of measurements, and compliance with these standards. Viewports: Viewports shall be locked when work within the viewport is completed. Block: Block must be created at full scale and on Layer 0. Also see Appendix C, University Standard Details, and Appendix D, University Standard Symbols and Abbreviations. DESIGN GUIDELINES AND STANDARDS 8
ROOM NUMBERING GUIDELINES Preliminary Room Numbers Preliminary room numbers are assigned by the project design team during preliminary design, when plans are still in development with all using departments. Preliminary room numbers can be established by the design team using the current guidelines in the Floor and Room Numbering Standards available on the OUA web site. Preliminary room numbers shall be preceded by an X. For instance, a room numbered 1234 shall be noted as X1234 until final room numbers are established. All drawings containing preliminary room numbers shall be identified with the note All room numbers are preliminary and subject to change located on the right edge of the drawing. This shall be coordinated with the adjacent note Preliminary Not for Construction. Final Room Numbers Final room numbers are assigned to a room or space by the University Architect and the Department of Space Management when final plans have been approved by all using departments. The Project Administrator shall submit plans to the Department of Campus Planning and Design (CP&D) and the Department of Space Management (SM) at least 2 weeks before design is complete. Upon receiving final room numbers, the design team shall revise all plans, details, and schedules to incorporate the number changes. Final room numbers shall be indicated without the preliminary X designation. For example, preliminary room X1234 may be changed to 1235 or, if it remains the same, designated as 1234. After all drawing changes are complete, the drawing note indicating All room numbers are preliminary shall be removed by turning off the appropriate CAD layer. All room numbering changes must be completed before bidding. Subsequent Room Number Changes If the floor plan layout changes after the final room numbers have been assigned, the revised drawings shall be resubmitted to CP&D and SM as soon as possible to establish a revised final room numbering assignment. DESIGN GUIDELINES AND STANDARDS 9
RECORD DRAWING FILES All drawing information should be submitted to University of Cincinnati, Office of the University Architect, and must conform to the requirements of these standards. The specific documents required for every project at the University (along with specific presentation and administrative requirements) are listed below. 1. Two copies of all electronic files shall be delivered on CD-ROMs in a format compatible with AutoCAD 2000. The.dwg file format is required. Any exceptions or special requests must have the prior approval of the Senior CAD Technician. The disks must be labeled with the following information: University project number Submittal date Set label (e.g., disk 1 of 3) 2. Electronic files must be identical to final media drawings. 3. All external referenced files must be bound to the associated file prior to submission. 4. All files must be purged prior to submission. 5. All files must include the same project title and project number in the title block. 6. All files must be noted as Record Documents and include the date of the submission. 7. A total listing of drawing files must be included in the submission. 8. A Quality Assurance Checklist must be provided in accordance with the Quality Assurance Audit section of these standards. QUALITY ASSURANCE AUDIT A Quality Assurance Checklist must be submitted with the CAD documentation at project closeout. This checklist confirms the A/E s verification that the submitted CAD drawings conform to these standards. The checklist must confirm the following: The file format is compatible with AutoCAD 2000. Layering complies with the layering guidelines. All files use the University prototype (or one that has the prior approval of the Project Administrator). File numbering conforms to these standards. DESIGN GUIDELINES AND STANDARDS 10
Text fonts conform to these standards. All entity properties are assigned by layer. All drawings are full scale in modelspace. Associative dimensions are used for all dimensions. No drawings have been enlarged or reduced using the SCALE command. All files have been purged. All external referenced drawings have been bound to the associated file. All electronic files are identical to the final media drawings. At the close of the project, the Project Administrator shall confirm that the CAD drawings accurately reflect all as-built conditions i.e., the presence, location, and approximate dimensional accuracy of all significant features, including doors, windows, walls, columns, stairs, ramps, and other general floor-plan layout items. Obvious errors or omissions will be noted on a review sheet. Projects shall not be considered complete until all items on the Quality Assurance Audit have been confirmed by the Project Administrator and Senior CAD Technician. DESIGN GUIDELINES AND STANDARDS 11