AutoCAD Drafting Standards

Transcription

1 Clark County Department of Aviation P.O Box Las Vegas, NV McCarran International Airport AutoCAD Drafting Standards 5 April 2004 Prepared for CCDOA by Kennedy/Jenks Consultants AutoCAD Drafting Standards, Clark County Department of Aviation i

2 Table of Contents (cont'd) Table of Contents Section 1: Section 2: Section 3: Section 4: Introduction Purpose and Applicability Terminology Contents Basic Requirements Compliance Software Utility Master Plan Database Purpose Using UMPD Data Accuracy and Information Updates Improving Functions and Capability...4 CCDOA Project Support Administrative Responsibilities CCDOA Staff Specific Services Compliance Review Process Kick-Off Meeting Compliance Reviews Set-up (<15%) Review % to 99% Reviews Final Submittal Record Drawing Reviews...8 Elements of CCDOA Drawings Applicability Infrastructure Classification Organization of a Project Drawing Set Element Phasing Descriptions Components of an AutoCAD Project...10 Document and File Naming Sheet Numbering File Naming and Directory Structure Single Sheet Per Drawing Multiple Sheets Per Drawing...14 AutoCAD Drafting Standards, Clark County Department of Aviation ii

3 Table of Contents (cont'd) External References...14 Section 5: Section 6: Section 7: Section 8: Layer Protocol and Pen Mapping Layer Names Condition/Phase (Section 3.4) 2 Characters Trade (Section 3.2) Up to 2 Characters Root (Section 3.2, equivalent to system) Up to 8 Characters Root Modifier (Section 3.2, equivalent to system component) 4 Characters, Precisely Optional Modifier Wild Card Not to Exceed 4 Characters Layer Name Breakdown by Fields Requesting Additions or Changes to the Layering Standards Pen Mapping Line Color, Thickness, and Type Line Weights/Pen Widths and Colors...17 Drawing Set-Up Sheet Borders Coordinate System AutoCAD Paperspace/Modelspace Modes External References (X-Refs) Layering External Reference Control to Support File Exchange...19 Drawing and AutoCAD Protocol Drawing Layout AutoCAD Drafting Protocol UMPD Layering Standards...22 Graphics Standards Library Title Blocks/Forms Text Styles/Sizes Hatching Symbols/Blocks Dimensions and Call-Outs Line Types...24 Appendices AutoCAD Drafting Standards, Clark County Department of Aviation iii

4 Table of Contents (cont'd) Appendix A Compact Disc Index Appendix B Layering Guide Appendix C Abbreviations Appendix D AutoCAD Pen Table Set-Up for Full-Size Monochrome Plots Appendix E Electronic Submittals AutoCAD Drafting Standards, Clark County Department of Aviation iv

5 Section 1: Introduction 1.1 Purpose and Applicability This manual provides the drafting standards and policies surrounding engineering drawings for the Clark County Department of Aviation (CCDOA). It is to be used by project managers, engineers, CAD technicians, and anyone organizing and compiling information into drawings for CCDOA, including CCDOA personnel, consultants, contractors and their subcontractors. This manual compiles McCarran International Airport standards information that was previously contained in Airport CAD standards for AutoCAD/Softdesk and Land Desktop manual, dated November This manual supercedes those documents. It is a continuously evolving document and will be revised periodically. Important updates will be distributed via electronic means. The information presented in this manual assumes that the user has a solid understanding of the common commands and features of AutoCAD 2000 software. Refer to Section 2 of this manual for instructions on how to request clarifications or receive approval to deviate from this manual. 1.2 Terminology? UMPD: Utility Master Plan Database. A GIS system that allows for the viewing, printing, storage, and retrieval of Master Record Documents and other project related documents.? CAD: Computer Aided Drafting (CADD Computer Aided Drafting and Design).? CAD Manager: Responsible for the implementation of CCDOA CAD standards specifically on aviation projects.? Construction Phase Representative: Person designated to ensure compliance with the standards and interface with the CCDOA CAD Manager during project construction and record drawings preparation.? Consultant s Representative: One or two members of the design team who are designated to ensure compliance with the standards and to interface with the CCDOA CAD staff. A consultant may have more than one set of representatives if they are involved in more than one project.? Design Team: All persons involved in the organization and compilation of information for the production of architectural and engineering drawings on a CCDOA project. Design teams may consist of CCDOA personnel only or multiple consultants and subcontractors.? Digital Data Administrator: Assigned to the CCDOA Engineering Department and responsible for maintaining contract documents. Associated with maintenance of the contract document vault.? Lead Drafter: Team member on CCDOA projects responsible for compliance with these standards. AutoCAD Drafting Standards, Clark County Department of Aviation Page 1

6 1.3 Contents This manual contains the information necessary for CAD technicians to maintain drawing uniformity, neatness, proficiency, speed and quality. It contains standards pertaining to drawing layouts, fonts, symbols, details, sections, views, line weights, layers, etc. The standards contained herein generally conform to standards established by authorities in each engineering field (e.g., AIA, CSI, APWA). It is important that drawings conform to the drafting standards as closely as possible since unclear drawings may cause conflicts between CCDOA and the construction contractor. Compliance with the standards is essential to improve the ease of information exchange between the various consultants involved on particular project. 1.4 Basic Requirements Compliance Drawings prepared for CCDOA must be complete and accurate. Unnecessary elaborate drawings should be avoided. All views, sections, details, etc. must be as complete as necessary to carry out the purpose of the drawing. The design firm must meet the standards contained herein before the construction documents will be accepted. Strict adherence to the layering standards is crucial for effective implementation of updating GIS model, i.e., the Master Record Documents. Any revision or variance to the AutoCAD Drafting Standards will require a written request for authorization by the CAD Manager Software Construction documents shall be produced using the following software:? AutoCAD or AutoCAD Map the latest version? Microsoft Office 2000 or Office XP or current version? Windows 98, NT, 2000 or XP or current version Other software may be used that improves the efficiency or quality of the construction drawings. The software may also make the drafting tasks easier. Add-on or overlay software shall produce documents that can be readily modified by AutoCAD. Examples are:? Land Development 3, Civil Design, Surveying or current version? CAD Overlay 2002 or current version? AutoCAD Bonus Tools? AutoDesk VIP Products? Icon Tools AutoCAD Drafting Standards, Clark County Department of Aviation Page 2

7 1.5 Utility Master Plan Database Purpose UMPD is a comprehensive electronic database of record drawings and existing conditions for CCDOA Aviation facilities. CCDOA staff together with the Engineering Department, the Information Technologies Department, and outside consultants developed the system. UMPD provides easily accessible existing site conditions using AutoCAD files, spreadsheets, and scanned documents. The information includes, but is not limited to, property lines, buildings, roads, lease lines, water bodies, monitoring wells, underground tanks, water utility systems (including water lines, valves, water meters, backflow preventers, etc.), electric panel schedules, fire protection systems, and special systems [e.g., transit systems, access control system (ACS), and others]. The drawings typically are plan views depicting related graphical elements such as electrical systems, which include electrical meters, power poles, lighting, wires, panels, handholes, vaults, switches, etc. Drawings are developed using layers with which related elements are drawn together to distinguish them from each other (e.g., walls from floors). The layers are then combined to create a multiple views. Prior to UMPD, existing site condition information was collected from Engineering Department record contract drawings (AutoCAD drawing files and mylar drawings in the vault), Maintenance Shop records showing field changes, Tenant Improvement drawings from the Property Management Groups, and others. The implementation of UMPD has shifted the research and recovery of existing conditions away from the vault to an UMPD management staff, which will be directed by Facilities Planning Department. By maintaining the UMPD Master Documents in a centralized location under designated supervisory control, future efforts to locate accurate information will be more efficient Using UMPD The UMPD system can be accessed using the CCDOA Intranet UMPD page, which uses GIS viewing software to access the UMPD. The system cannot be accessed via the Internet. The UMPD can be a benefit in the following areas:? CCDOA staff, consultants, contractors, and vendors while researching existing conditions at CCDOA facilities.? Fewer field changes during construction.? Consistency of information and drawings used by multiple parties.? Police/Fire can view accurate drawings for emergency response issues.? Property Management and Marketing staff can view up to date facility drawings to show to prospective tenants.? Engineers and Planners can view current site information during planning phase of projects.? Maintenance staff can locate specific objects that may require repair. AutoCAD Drafting Standards, Clark County Department of Aviation Page 3

8 1.5.3 Data Accuracy and Information Updates Typically, all elements located outside the buildings are accurately located with X, Y, and Z coordinate points (northings/eastings and elevations). Elements located inside the buildings are generally not coordinate point located. When new information is made available from surveying or the record drawing process, UMPD facility drawings are updated to show current conditions. Drawing provided by the DOA will not be altered in any manner, unless otherwise stated in this manual. The database will be updated on an ongoing basis from a variety of different sources. These sources include the Engineering Services Department record contract drawings, CCDOA Survey Crew records, Maintenance Department field changes and CCDOA Construction Services projects. Maintenance of the database involves a CCDOA-wide team effort. Procedures for providing information to the UMPD gatekeeper are contained in Section Improving Functions and Capability The system is set up to be flexible for future development. The initial system was implemented using basic functions to allow the end users the ability to affect the evolution of the system. The system and website are intended to allow interaction between the users and system gatekeepers. UMPD is a Geographical Information Systems (GIS) database. The UMPD database is based on attributed data (i.e., non-graphical data related to a specific object). Examples of attributed data within UMPD are spreadsheets showing type, manufacturer s name, model number, and capacity of an object. Additional attributes can be added. AutoCAD Drafting Standards, Clark County Department of Aviation Page 4

9 Section 2: CCDOA Project Support 2.1 Administrative Responsibilities CCDOA drafting documents are managed under two authorities: Engineering Records and Master Record Document (MRD) Management. Engineering Records maintains legal records of project bid documents and construction record documents, including drawing sets and project manuals. Engineering Records also administers the bid desk. MRD Management is responsible for enforcing the CCDOA CAD Standards and maintaining master facility drawings including exterior base maps, building interior floor plans, and a library of system diagrams and detail drawings. The MRD system supports the UMPD. CCDOA has a vested interest in the efficient and successful implementation of CCDOA Standards. Therefore, these standards establish a project review process in which CCDOA CAD staff supports and assists designers/cad technicians on CCDOA engineering projects and enforces compliance to the standards via periodic reviews. In addition, the process is designed to allow consultants and contractors to provide feedback on and request changes to the standards CCDOA Staff Section 3 describes instances in which the design team will need to interface with the CCDOA CAD staff. All requests for additions, changes, or exceptions to CCDOA Standards must be made in writing or by . The staff contacts are listed below. The UMPD Administrator can be reached as follows: Address: Clark County Department of Aviation Attn: GIS Manager P.O. Box Las Vegas, Nevada Telephone: (702) Fax: (702) doagis@mccarran.com Specific Services In addition to being available for general assistance with the standards, CCDOA CAD staff provides the following specific services.? Assign project numbers. CCDOA project numbers are assigned by the Finance Department. Tenant Improvement project numbers are assigned by the Project Coordinator. AutoCAD Drafting Standards, Clark County Department of Aviation Page 5

10 ? Provide periodic training seminars for general dissemination of CCDOA CAD standards. The seminars generally last between one and one-half hours and are offered approximately every six weeks to audiences of up to 20 people.? Meet with consultant representatives early in the design phase to provide orientation for the design team on the specific application of the standards to the new project. This includes clarification of X-referencing protocol associated with the use of UMPD Master Documents and directions on tracking changes to drawings.? Review AutoCAD drawings to enforce standards compliance.? Review of request for the addition of new layers to the approved list.? Delivery of copies of the UMPD Master Documents. 2.2 Compliance Review Process A review of a partial project set (Section 2.2.2) will be conducted at project initiation. Compliance reviews normally occur at the 30% and 90% submittal, final submittal, and record drawings submittal. The final construction document set and record drawing submittal are required to comply with CCDOA standards. Consultants may request a review even if it is not required by contract, but must also follow the contract schedule and costs Kick-Off Meeting At the time of initiating drawing production work, the CCDOA project manager will instruct the consultant s representative to contact the appropriate CCDOA CAD staff. The CAD staff will provide the consultant s representative the CCDOA CAD standards and schedule a meeting to discuss specific items of the project that they relate to drawing production. The main purpose of the meeting is to familiarize consultants with CCDOA standards. Another purpose of the meeting is to identify which Master Documents the consultant will need. Requests for Master Documents shall be made by the consultant s representative in person, in writing, or by to the CCDOA CAD staff with a copy to the CCDOA project manager. Requests for master documents for Aviation projects are to be made through the GIS/CAD Manager. The following information shall accompany the request.? Project name and number? Contract number? Project Manager? Consultant s Representative? Anticipated date (month/year) of contract document completion. The CAD staff will record all master document deliveries so that the CCDOA can track the issuance of the documents. AutoCAD Drafting Standards, Clark County Department of Aviation Page 6

11 During the kick off meeting, the CCDOA CAD staff will familiarize themselves with the alterations to the master documents that are expected to occur as result of the new project. In addition, the CCDOA CAD staff and consultant s representative will propose and/or develop the project specific protocol for tracking and recording changes to the master documents Compliance Reviews The CCDOA may comment on any information that is submitted. As a general rule the main areas of concern are as follows:? Layer naming (Purge and delete all unused layers in each drawing prior to submittal.)? CCDOA title block and borders? CCDOA symbols? Correct use of AutoCAD Paperspace & Modelspace? External references? CCDOA abbreviations? Building grid? Coordinate system? Submittal file naming and spreadsheet? Electronic drawing index spreadsheet? Drawings will be routed back to the consultant via the CCDOA Project Manager for correction of non-compliant items. Requests for reviews shall be made to CCDOA CAD staff in writing or by . Copy this request to the appropriate CCDOA Project Manager. The request should include the following information:? Project name and number? Contract number? Project Manager? Type of work being done? Location of project? Consultant s representative? Anticipated date (month/year) of contract document completion? Number of files? Titles of drawings that are being submitted if a cover sheet is not part of the submittal Set-up (<15%) Review Shortly after the project kick off, the consultant should prepare and submit documents indicating that the consultant understands CCDOA Standards. The submittal should include both prime AutoCAD Drafting Standards, Clark County Department of Aviation Page 7

12 and sub-consultant documents. Submit a mix of at most five (5) representative electronic drawing files for each discipline (see section 4.1). The AutoCAD files should consist of the following types of drawings on a typical project:? Title Sheet? Site Plan? Foundation Plan? Sections? Detail Sheets? Schedules? CAD drawing with a border, sample plan layers, and a pcp file? CAD plan drawing with the location of work relative to the Airport coordinate system and proposed named UCS views? CAD plan with an UMPD Master drawing (if applicable to the project) and grid x-referenced? Proposed directory structure for the Final Submittal % to 99% Reviews Submit in accordance with your contract. The review process is intended to be iterative. Therefore, early stage compliance and demonstration of an understanding of the standards will reduce later stage review time. During each review, if a spot check indicates that a project is clearly not compliant, the submittal will be returned only partially reviewed. Reviews may be requested at any time, even if it is not required by contract, but must also follow the contract schedule and costs Final Submittal A submittal will not be considered final until it complies with the standards, as evaluated during the 30%-99% reviews. Lack of compliance can be used as justification to delay a project going to bid Record Drawing Reviews Record CAD drawing production may be performed by the consultant, by the construction contractor, or by CCDOA depending upon the terms of the construction contract and who performed the work. If control of project CAD files is turned over from the Design Team to a construction phase representative, the CCDOA CAD staff will provide the standards and training (as appropriate) described above to ensure continuity of the application of the standards to the drawing set. Record drawings are submitted to the Digital Data Administrator, who will forward the submittal to the CAD staff for storage in the UMPD database. (Also see Appendix E Electronic Submittals.) A meeting to conduct the training should occur prior to transferring red-line information into the CAD files. The meeting should also project the final drawing set content since it is likely some data, such as demolition sheets, might not be included. AutoCAD Drafting Standards, Clark County Department of Aviation Page 8

13 Section 3: Elements of CCDOA Drawings 3.1 Applicability The primary goal of a project AutoCAD design group is to present a graphical and textual depiction of architectural and engineering designs that can easily be interpreted by a construction organization. On the other hand, AutoCAD project files should be produced using a systematic approach that allows for the capture of categorized master record information and updating of the UMPD. The approach can be difficult to establish within a rigid standard and a description of an AutoCAD style is useful. While discussing CCDOA projects it is essential that common terminology be used and an understanding of CCDOA s style be understood. 3.2 Infrastructure Classification The following is a list of terms used to classify infrastructure components within a design project.? Discipline Designation of an engineering or architectural field that encompasses the design of particular systems. CCDOA-recognized disciplines are Architectural (A), Civil (C), Electrical/Power (E), Fire Protection (FP), Water (W), Hydrology/Hydraulics (H), Fueling(F), Landscaping (L), Mechanical (M), Plumbing (P), Structural (S), Storm Drain (SD), Sanitary Sewer (SS), Telecommunications (T), and Utilities (U). The General (G) discipline is used to categorize general design information such as title blocks, notes, legends, abbreviations and indexes.? Sub-discipline CCDOA recognition of specialization within disciplines to allow more descriptive categorization of design information.? Trade a discipline/sub-discipline combination.? System A set of objects acting together to perform a function. Examples include sanitary sewer, baggage handling, communications, power supplies and HVAC.? Component Objects within a system, e.g., a pump within and industrial waste system, manhole within a storm sewer system or a panel within an electrical power system.? Object A tangible facility, structure, utility or piece of equipment that exists or will be constructed or installed as part of a design and construction project. Objects within an AutoCAD model have physical dimension and can be either two- or three-dimensional.? Element inclusive term to describe objects, systems or portions thereof.? Schematic A non-dimensional representation of an object or system. Examples including wiring diagrams, process and instrumentation diagrams (P&IDs), hydraulic grade lines and input/output (I/O) diagrams. 3.3 Organization of a Project Drawing Set Projects drawing sets shall contain the following general information:? Cover sheet? Sheet Index AutoCAD Drafting Standards, Clark County Department of Aviation Page 9

14 ? Vicinity/Key Maps? Legend and abbreviation sheets? Site plans? Engineering and architectural sheets 3.4 Element Phasing Descriptions Elements in a drawing set may represent existing conditions that will remain or be demolished or they may represent new facilities that could be constructed in phases. The following is a list of element classification based on these possible phases.? Existing elements constructed or installed prior to a current project; represented in an approved as built and/or survey and in the master record drawings, once updated.? Concurrent currently non-existent but being designed as part of concurrent separate project and has an effect on the design of the current project.? Demolished existing elements that will not exist at project completion. Demolition can occur in phases? Relocated - existing elements that will not exist in the same location at project completion as they were prior to construction.? Project current project elements including: Design/phased elements constructed or installed during the current project or within a particular phase of a multi-phase project. Future (planned) elements roughly depicted in a current project to allow for space planning, system load planning or future compatibility.? Record Drawing object and line work modifications resulting from as-built red-lining that are distinguished from models created by the design team.? Abandoned elements left in place and no longer in use. 3.5 Components of an AutoCAD Project The following is a list of AutoCAD components that describe how design information can be generated and organized with in an AutoCAD file set.? Model - A compilation of AutoCAD entities to graphically depict a design element. Schedules, notes, legends, key maps and other indexing information are not considered models. External References (Xrefs)? Background contains existing elements only. No project elements are shown in a background. Demolished or relocated elements that will not exist following construction of the project can either be deleted from the background or placed on new layers and then removed from view by freezing those layers in applicable views. In demolition drawings, entities to be removed are unfrozen to show the objects AutoCAD Drafting Standards, Clark County Department of Aviation Page 10

15 affected by demolition. The decision to delete entities or freeze layers would be based on the extent of demolition.? Concurrent Xrefs a model obtained from another project. The same rules apply as for a background, i.e., elements not shown can be deleted or placed on separate layers and frozen.? Project Xref contains project elements including design, phased and future. Viewing of elements can be organized using multiple Xref files or layer control. At a minimum each Xref shall contain only one level of a building. Preferably, each Xref should contain only one discipline. Phasing is usually best accomplished by layer control: layer names for all elements within common phase contain a common tag so that they can be filtered and frozen together separate from other phases.? Record Drawing Xref objects and line work resulting from record drawing red-lining contained in a separate file to distinguish them from models created by the design team? Xref segregation existing, concurrent and new design information should usually be contained or created in separate files. For minor additions, new design objects can be included with in existing or concurrent backgrounds and distinguished by layer naming. Sheet (Paperspace)? Part of drawing set used to clearly present a limited portion of a model, which can be scaled to allow interpretation of more detail.? Contains indexing information such as sheet and project number.? Each AutoCAD file shall contain one sheet (i.e., Layout 1) or several sheets based on a particular discipline (i.e., C1.00, C1.01,.). Model space? Insert Xrefs into model space with no nesting (using overlay is not considered nesting)? Annotate models with information that should remain with the model regardless of which sheet it is shown on, e.g., dimensions and some leaders.? Plan view models should externally referenced into model space of sheet files, even if it is referenced into only one sheet. Plan View and 3-D Models? Identify systems and components using layering.? All models shall be created to scale, except for variable-dimension standard details.? Models shall be created in the coordinate system or easily translatable to the coordinate system. For example, a floor plan can be created in an independent coordinate system as long as it can be inserted onto an outline of the floor on a site plan. This includes plan view details except that system and component identification is not necessary. Sections, Details and Elevations? Layer definitions are based on line weight and line type descriptions and component clarity is not required. AutoCAD Drafting Standards, Clark County Department of Aviation Page 11

16 ? System and component identification (if desired) can be accomplished by using the optional modifier? Coordinates are not required for non-plan view details, sections and elevations. 3D Models vs. Projections? 3D models are, by definition, prepared in the POS coordinate system because they contain plan view information.? Sections, details and elevations extracted from 3D inherently contain system/equipment identification.? Projections from a 2D plan view systems should be translatable to the coordinate system.? Unused objects, construction lines and other clutter shall be deleted/purged prior to final submittal. Diagrams? Include P&IDs, I/O (input/output), ladder logic, motor controllers, wiring diagrams, hydraulic grade lines and flow charts related to the function of a designed system. Diagrams belong in model space. System and component identification using layers is not required. AutoCAD Drafting Standards, Clark County Department of Aviation Page 12

17 Section 4: Document and File Naming 4.1 Sheet Numbering Drawing sheets are numbered according to the following protocol:? Discipline/Sheet No. - E100 Designator LAS OL7 1L3 VGT HND UO8 IVP Facility Name McCarran International Airport Jean Airport Searchlight Airport North Las Vegas Airport Henderson Executive Airport Perkinsfield/Overton Ivanpah All sheet numbers shall begin with one of the following discipline letters: Trade Name Discipline Trade Name Discipline G General CS Control System C Civil W Water U Utilities SS Sanitary Sewer A Architectural H Hydrology/Hydraulic S Structural NG Natural Gas M Mechanical F Fueling P Plumbing FL FAA Lighting FP Fire Protection NA Navigational Aids E Electrical/Power ST Steam System T Telecommunication CW Chilled Water SD Storm Drain CT Cooling Towers L Landscape SE Security D Demolition Title and index sheets shall be general (G) sheets and the drawing set cover/title shall be G0. The selection of sub-discipline characters is subject to CCDOA approval. 4.2 File Naming and Directory Structure There can be one sheet per electronic file or several sheets per electronic file, subject to CCDOA approval. The protocol for naming electronic drawing files is as follows. AutoCAD Drafting Standards, Clark County Department of Aviation Page 13

18 4.2.1 Single Sheet Per Drawing Drawing Files: All sheet files submitted to CCDOA shall be named the same as the sheet number except decimals (.) shall be replaced with underscores (_) and the sheet number immediately after the discipline letter shall contain three digits. Below are some examples: Sheet Number File Name E1 LAS2167E001 C2.3 LAS2167C002_3 S LAS2167S061_8_ Multiple Sheets Per Drawing Drawing Files: All drawing files with multiple sheets per drawing shall be named as the discipline and sheet series. Layout shall be named after each sheet number. Below are some examples: File Number Layout Names LAS-2167E100 E1.00 LAS-2167C200 C2.10, C2.11, C External References External References (Xrefs): Within the Xref Manager of a sheet file, limit the Xref name to no more than eight characters. UMPD Master Documents that are used only as backgrounds and not altered shall retain this original eight-character name (i.e., as stored in the UMPD database). Xref file names shall be of the following format: Indexing Location Format Example Xref Manager Xrefname (not to exceed 8 characters) SITEPLAN FLORPLAN File name X_XREFNAME user defined X_SITEPLAN_ABCInc X_FLORPLAN_ACME Name for layer inserted onto (see Section 5) X1_d_XREFNAME where d is the discipline X1_C_SITEPLAN X1_A_FLORPLAN The user defined portion of the file name is to distinguish Xrefs originating from the same source that are slightly modified by the end users, e.g., the prime and subconsultants. Directory Structures: CCDOA Standards do not require that the consultant maintain any specific directory structure for their working drawings on their on computer systems. However, when files are transmitted for review and archiving to CCDOA, improper filing can complicate the use of external references. Therefore, all sheet files (from all designers and subs) shall be included in a single directory named Sheets. All X-refs and other supporting files such as fonts and plot files, shall be submitted in a directory named Support_Files. Once the files are received at CCDOA, the CAD staff will organize the drawings as needed to load Xrefs. Refer to Appendix E for information on preparing electronic submittals. AutoCAD Drafting Standards, Clark County Department of Aviation Page 14

19 Section 5: Layer Protocol and Pen Mapping 5.1 Layer Names Layer names are formatted to convey classifications as described in Section 3, also see Appendix B. Naming is based on the AIA standard with an addition of a condition/phasing group. There are five distinct group variables within the layer name, as described in the following subsections Condition/Phase (Section 3.4) 2 Characters Phase/Condition 1 st Character 2 nd Character Comments Existing E A, B, C, D 1 Concurrent C 1, 2, 3. 2 Project design or phased design P 1, 2, 3. 2 Future F 1, 2, 3. 2 Demolished D 1, 2, 3. 2 Relocated R 1, 2, 3. 2 As built A 1, 2, 3. 2 Comments: 1. 2 nd character is quality level. Quality is determined only by CCDOA survey nd character is phase, if applicable. Default = Trade (Section 3.2) Up to 2 Characters Trade Name Discipline G General C Civil A Architectural S Structural M Mechanical P Plumbing FP Fire Protection E Electrical L Landscape H Hydrology/Hydraulics U Utilities CS Control systems W Water SS Sanitary Sewer SD Storm Drainage T Telecommunication NG Natural Gas F Fueling FL FAA Lighting AutoCAD Drafting Standards, Clark County Department of Aviation Page 15

20 Trade Name NA ST CW CT SE Discipline Navigational Aids Steam System Chilled Water Cooling Towers Security Root (Section 3.2, equivalent to system) Up to 8 Characters This group is fixed by CCDOA and generally follows the AIA standard. Changes or additions shall be submitted to the CCDOA for approval Root Modifier (Section 3.2, equivalent to system component) 4 Characters, Precisely This group is fixed by CCDOA and generally follows the AIA standard. Changes or additions shall be submitted to the CCDOA for approval Optional Modifier Wild Card Not to Exceed 4 Characters If the optional modifier is available, the consultant may use this field on an as needs basis and the consultant does not need to submit the layer to CCDOA for approval. The layer should be submitted to CCDOA during the review process, so that it will be recognized as a valid layer during the drawing review Layer Name Breakdown by Fields Trade Name Root Root Modifier Condition EA_C_WATER_VALVE_OPEN Optional Modifier 5.2 Requesting Additions or Changes to the Layering Standards Layer names are continuously being updated and are available upon request from the CCDOA. The consultant may request that layers be added to CCDOA Standards. Notify the CAD Manager or UMPD Administrator in writing or requesting a new layer name. Requests AutoCAD Drafting Standards, Clark County Department of Aviation Page 16

21 may be refused if not in the best interest of CCDOA. Reasons for approving new layers include the following:? Adds to the clarity of the Construction Documents? Increases the future flexibility of the CAD document? Applicable to a variety of projects? Required to complete the design work? Assists in coordinating the work between disciplines. No new layers shall be on the Final or Record Drawings submittals without approval of the CAD Manager or UMPD Administrator. The consultant s fee shall be based on CCDOA Standards in effect when your contract was signed. A denial of a request is not considered just cause for scope adjustment. 5.3 Pen Mapping Line Color, Thickness, and Type Requirements for line color, thickness and type are project specific and shall be established according to the needs of the contract documents. Include an AutoCAD pcp file with all CAD submittals. Submittals absent the pcp file may be rejected Line Weights/Pen Widths and Colors See Appendix D. AutoCAD Drafting Standards, Clark County Department of Aviation Page 17

22 Section 6: Drawing Set-Up 6.1 Sheet Borders Use CCDOA standard borders and title sheets for all drawings. CCDOA standard sheet size is 24 x 36. CAD files for title and border sheets are available from CCDOA along with other standard symbols. Refer to Section 7.02 for additional information on borders. 6.2 Coordinate System The UCS World Coordinate point and orientation in a plan drawing shall be set. Land Desktop 3 Northings will match AutoCAD Y coordinates and Eastings will match X coordinates. Use the named UCS views and named view commands to create the views required to work and to create the appropriate orientation for the construction document. AutoCAD drawings will be set up using ground coordinates based on the Nevada State Plane Coordinate System (NCS 83). Record coordinate values for monuments within the Airport boundaries are available on the following Records of Survey. McCarran International Airport Record of Surveys File 90, Page 7 Henderson Executive Airport Record of Survey File 83, Page 27 North Las Vegas Airport Record of Survey File 47, Page 1 Jean Airport Record of Survey File 79, Page 6 Overton Airport Record of Survey File 131, Page 87 Searchlight Airport Survey Pending as of 4 February 2004 The vertical datum for all construction work will be NAVD 88. CAUTION TO ALL DESIGNERS: Failure to use the standard coordinate system or vertical datum may require uncompensated design rework. Failure to confirm actual horizontal and vertical positions of existing tie-in points may result in additional construction costs. Such additional costs will be borne by the designer. 6.3 AutoCAD Paperspace (Layout)/Modelspace Modes? Paperspace Mode: Use Paperspace for the following: Arrange, annotate, and plot various views of the drawing Sheet Borders, Title blocks and anything in the title block. North Arrows and Graphic Scales. General Notes and Sheet Notes. Schedules and Legends. AutoCAD Drafting Standards, Clark County Department of Aviation Page 18

23 Sheet Layout information. Plan, Elevation, Section and Detail Title Bubbles and Text. Grid lines used to divide details shall be placed in Paperspace. Details shall be brought individually into Paperspace viewports.? Modelspace Mode: Draw the following in Modelspace: Physical building objects such as walls, doors, columns, lights, conduit, fixtures, pipe, and ducts. Building plans, sections, elevations and details are drawn in Modelspace. Text that is used to identify a line or a specific object. Typically text with a leader is drawn in Modelspace. Hatch patterns. Dimensions. Detail call outs and section cuts. Object symbols such as wall type symbols, door symbols, column types and equipment symbols. Diagrams. AutoCAD lets you work on your drawings in Modelspace or Paperspace. Use Modelspace to do most drafting and design work. Use paper space to arrange, annotate, and plot various views of your model. Each view can show a different part of the model or display it from a different viewpoint. Title blocks, general notes, sheet notes, and entities that are not attached to entities that represent real objects must be placed in PaperSpace. The rest of the entities, such as real entities and objects referring to them, should be placed in ModelSpace. 6.4 External References (X-Refs) Layering Insert external references onto designated layers as listed and described in Appendix D Layering Guide. External references are NOT to be inserted onto layer 0 (zero). Use only background layers that are provided for each discipline. Use the overlay option for x-referencing unless the document requires otherwise. In some circumstances it may be necessary to bind X-references into a drawing. Because some layer names may be as long as 21 characters, X-reference file names must be limited to eight characters (see section 4.02) to ensure that layer names that result after binding do not exceed the 31-character AutoCAD 14-character limit External Reference Control to Support File Exchange These CAD production standards make a clear distinction between AutoCAD sheet files and supporting (X-reference) files. The following guidance is provided:? Sheet files shall not be used as X-references in other sheet files. If a drawing that was originally developed in model space for a sheet file is to be used as an X-reference, that AutoCAD Drafting Standards, Clark County Department of Aviation Page 19

24 model must be saved as a separate file (eight characters) then referenced back into the original sheet file and any other sheet files for which it is needed. AutoCAD Drafting Standards, Clark County Department of Aviation Page 20

25 Section 7: Drawing and AutoCAD Protocol 7.1 Drawing Layout Consistent drawing layout ensures organization and clarity of elements within a drawing. General guidelines are as follows:? Notes: Notes are written to the upper right side of the sheet.? Legend: Legends appear under the Notes.? Vicinity Plan: Vicinity Plans on a site plan drawing appears to the left or below the legend. The Vicinity Plan (or map) shows the general area where the work is to be performed.? Location Map: A location map is used when a vicinity map does not give enough information on job site location and access.? Contract Blocks: Any Major Contract (if a title sheet is not used) or Small Works Blocks are placed below the Legend.? Graphic Scale Blocks: Scales should be written out and designated with graphic scale bar.? Layout Spacing: All drawing elements (details, sections, etc.) should have least 1-inch between them to prevent confusion with adjacent elements.? Sheet Layout: Layout details (elevations. sections, etc.) in a grid pattern so that they relate to each other horizontally and vertically.? North Arrow: North arrow is placed in the upper right portion of the site plan. North is oriented up or to the right.? Numbering Protocol: Number details horizontally by rows starting at top row, left side of the sheet. Continue numbering horizontally to the right, and then proceed to the next row. 7.2 AutoCAD Drafting Protocol The following are general guidelines and cannot address every drafting condition. The consultant may propose changes and additions or request exceptions to the requirements. Requests shall be made to the CAD Manager.? Sheet Size/Borders: CCDOA standard sheet size is 24 x 36. CCDOA standard sheet borders are to be used for all drawings prepared for and by CCDOA.? Plot Date: All prints submitted to CCDOA shall have a plot date and drawing file name in the lower left side of the drawing as shown in the CCDOA standard border.? Scale and Units: Objects shall be drawn to actual scale 1 =1. Use architectural units for building drawings. Use engineering units for site plans, utility plans, demolition plans, and grading and paving plans. Use architectural units for sections, details, floor plans, and reflected ceiling plans.? Object Properties: Properties shall be set BYLAYER. Do not adjust object properties by entity (forcing colors or line types) unless approved by CCDOA. AutoCAD Drafting Standards, Clark County Department of Aviation Page 21

26 ? Layer Control: Freeze layers rather than layers OFF. Elements that are part of a block that are on a different layer than others in that block may still appear when you turn the layer off instead of freezing it.? Dimensioning: Use associative dimensioning. Do not force the distance text in a dimension, except as follows: Details or sections where the item being dimensioned is divided by break lines or is partially drawn. Diagrams that are not drawn to scale. All drawings prepared for or by CCDOA shall be drawn in two dimensions (2-D), unless otherwise requested by CCDOA.? Line types: Use only CCDOA approved line types. Refer to Appendix A.? Fonts: Use only AutoCAD standard fonts. Do not submit third party fonts.? Menu Files: Do not submit or use any third party mnu files or menus in the drawing. 7.3 UMPD Layering Standards Whether by CCDOA or by consultants, all drawings submitted will be layered in accordance with the Layering Standards. During drawing production, if it appears that additional layers are needed, contact the UMPD Administrator for direction. AutoCAD Drafting Standards, Clark County Department of Aviation Page 22

27 Section 8: Graphics Standards 8.1 Library Refer to Appendix A. 8.2 Title Blocks/Forms The CCDOA standard title and border sheets are to be used for all drawings prepared for and by CCDOA. Title and border sheets are inserted into Paperspace at 0,0 and attribute information entered in full. Do not explode title and border sheet blocks. AutoCAD files of title and border sheets are available upon request from the CCDOA. 8.3 Text Styles/Sizes Standard AutoCAD text styles are used for CCDOA CAD drawings. The required text styles are ROMAN D and SIMPLEX. Other acceptable fonts are ROMAN S and ARIAL fonts, which may be used for survey point text.? Detail call-outs, dimension text, notes and subtitles (under Sections, Details, and Elevations) use ROMAN D text style. ROMAN S can be used if space is limited.? Titles, headings, or major call-outs use ROMAN D text style. Text heights shall be as shown in the table below. Table 1: Text Height Civil Architectural Notes Titles/Headings Dimensions Text to minimum 0.10 minimum 1/8 1/8 3/16 to 1/4" 3/32 minimum 3/32 minimum 8.4 Hatching The use of hatching is limited to the AutoCAD default hatch patterns. The scale of the pattern shall be relative to the scale of the drawing. Use the appropriate layer assigned for hatching. Refer to Appendix D. 8.5 Symbols/Blocks The following are general guidelines for creating blocks. Nested blocks are prohibited when drawing in two dimensions. AutoCAD Drafting Standards, Clark County Department of Aviation Page 23

28 Blocks that have all objects on the same layer, shall be created on layer 0 (zero). The block should then be inserted into the drawing on CCDOA designated layer. Nested Blocks are prohibited. Blocks may contain multiple elements on different layers. The construction of these type blocks is more complex and requires planning. Some objects in the block may need to match the properties of the layer on which the block is inserted. These objects shall be created on layer 0. Block objects that are not created on layer 0 shall follow CCDOA standards. The block should then be inserted into the drawing on CCDOA designated layer. 8.6 Dimensions and Call-Outs Dimensions and call-outs can both enhance and clarify a drawing's purpose or cause confusion for the intended viewer. The following guidelines can help ensure clarity in drawings.? Repetition of dimensions and elevations should be avoided to eliminate the errors when revisions occur.? In a chain of dimensions, the overall total is omitted. It is preferred to omit the least significant dimension of a chain and include the total dimension. Longer and larger dimensions should appear on the outside of all other call outs.? On mechanical and electrical drawings, dimensions irrelevant to the drawing's discipline, such as civil, architectural, structural dimensions, are not shown.? Dimension lines are to be located far enough from the item being dimensioned to ensure clarity between the dimension lines and the object being dimensioned.? Dimension text height is.125 at 1:1 scale.? All fractions to be written as: ½ not, and 2-½ not.? Avoid crossing dimension and leader lines. If crossing is unavoidable, break one of the lines (leader lines first) at the point of crossing.? Wherever possible, text should appear inside and above dimension lines. If impossible to dimension otherwise, text can be shown outside dimension lines with leader extension connecting text and dimension lines.? Wherever possible AVOID: Crossing leader lines Long leader lines Horizontal and vertical leader lines Leaders parallel to adjacent dimension lines, extensions lines, or cross-hatching Small angles between leaders and the lines upon which they terminate. 8.7 Line Types All line types will be standard AutoCAD2000/Land Desktop 3 or current version. AutoCAD Drafting Standards, Clark County Department of Aviation Page 24

29 When changes are authorized, the Consultant will provide CCDOA Engineering Division a copy of the line type files on disk during the design phase. All unused line types will be purged from each drawing. AutoCAD Drafting Standards, Clark County Department of Aviation Page 25

30 Appendix A Compact Disc Index AutoCAD Drafting Standards, Clark County Department of Aviation Page 26

31 APPENDIX A COMPACT DISC INDEX Available with this manual is a compact disc (CD) containing Clark County Department of Aviation standard symbols, blocks, borders, templates, etc. The files can also be received from the CCDOA CAD staff. Below is an index of the files on the CD. This appendix also contains a hard copy list of abbreviations, AutoCAD w-blocks with file names, line types, standard hatch patterns, reference symbols with file names, and POS stamps. Appendix B contains sample drawings. CD Index W-Blocks Reference Site Civil Sheet Blocks Borders Sheet Index Stamps Signatory Sheets Legend Sheet Templates Abbreviations Civil Key Plans and Vicinity Maps Aviation PDF File of the Standards Manual Linetype Files Fonts Layer Templates (.dwg) Layer Management Tool Application for entering standard layer names. AutoCAD Drafting Standards, Clark County Department of Aviation Page 27

32 Appendix B Layering Guide AutoCAD Drafting Standards, Clark County Department of Aviation Page 28