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The standards emphasize accurate coordinate systems, reliable XREF-based file exchange, and consistent project structure across disciplines and consultants. Guidelines specify model-space usage, UCS and datum practices, naming conventions for XDESIGN elements, standard KCM layers and text styles, and restrictions on reserved layers and fonts to support plan production and collaboration.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/king-county-metro-cad-standards-march-2024/662435/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/king-county-metro-cad-standards-march-2024/662435.png","ImageObject",300,407,{"name":92,"@type":93},"FajarTechTalk","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-28",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why are coordinate systems and project standards emphasized in these CAD guidelines?","Question",{"text":112,"@type":113},"To maintain accuracy, support reliable exchange of design information, and enable collaboration across the project team and disciplines.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How should design drawings and XREFs be organized for plan production?",{"text":117,"@type":113},"Design drawings are created in model space and referenced into sheet drawings. Base and overlay drawings are externally referenced into working files as XREFs for plan production.",{"name":119,"@type":110,"acceptedAnswer":120},"What are the key drafting and file-structure rules for site drawings?",{"text":121,"@type":113},"Site drawings should use world UCS, define 0,0 and coordinates from the X-Base survey/conditions when available, avoid drawing on reserved layers (like layer 0 and defpoints), and create each discipline/site element as separate XREF overlay files with the specified naming format.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},662435,1793217890,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":41},962094249465,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","King County Metro  \nCAD Standards  \nMarch 2024  \nTable of Contents  \nPage  \n1 Drawing Guidelines.................................................................................1  \nOverview ................................................................................................. 1  \nGeneral Drafting Guidelines ........................................................................ 1  \n2 Annotation..............................................................................................3  \nAnnotation Styles ......................................................................................3  \nAnnotation Objects ....................................................................................3  \n3 Creating Civil 3D Data in Xrefs................................................................4  \n4 Layers.....................................................................................................5  \nHorizontal Construction & Site Plans ............................................................5  \n5 Colors .....................................................................................................7  \nLayer Color Guidelines ...............................................................................7  \n6 Callouts, Detail Numbering and Section Lettering...................................8  \n7 Drawing Numbering System Key...........................................................10  \nKing County Metro CAD Standards  \ni  \nCAD Standards Drawing Guidelines  \n1 Drawing Guidelines OVERVIEW  \nIt is important to maintain an accurate coordinate system, consistent file structure and project standards to allow the reliable exchange of design information amongst the project team and to facilitate reliable collaboration across disciplines and between consultants and internal staff. Design drawings, also referred to below as XREF’s, will be in model space (with nothing in paper space) . These files will be referenced into Sheet drawings for plan production. Sheet drawings will contain annotations and page layouts. The base drawing and additional design drawings will be externally referenced as Overlays into your files. These standards have been developed in accordance with the National CAD standards, supplemented to align with other partner agency standards such as City of Seattle and Sound Transit and refined to provide flexibility for additional King County Metro design needs.  \nGENERAL DRAFTING GUIDELINES  \n▪ Site drawings should be saved in world UCS.  \n▪ Drawing 0,0 and coordinates shall be defined by the Survey/Existing conditions drawing (X-Base) . This drawing is created from survey files, when available. Aerial imagery or GIS data from an approved King County Source or Metro Facility Drawings may be used to locate design linework when Survey is not available.  \n▪ North arrows should be oriented up, to the left or aligned with Right-of-Way unless specified by permitting jurisdiction .  \n▪ Do not draw on layer 0 (zero) . This layer is reserved for objects within blocks and CAD styles.  \n▪ Do not draw on layer defpoints.  \n▪ For layout guidelines use layer G-ANNO-NPLT.  \n▪ Create the site design in model space at 1 drawing unit = 1 ft. Units for details, vertical construction and building elements can be determined by discipline. Please note drawing unit settings in model space to the right of drawing elements together with other pertinent CAD settings and adjustments to file norms.  \n▪ Create each site design element/discipline as a separate file (XREF) . All XREF’s should be inserted into files as Overlay. The file name should follow this format: XDESIGN ELEMENT-ABBREVIATED PROJECT NAME. DWG.  \n▪ Sample List:  \n􀀃 X-BASE-Proj (survey or existing conditions)  \n􀀃 X-SITE-Proj (site design)  \n􀀃 X-DEMO-Proj (site demolition)  \n􀀃 X-ARCH-Proj (building information)  \n􀀃 X-GRID-Proj (building/MEP grid)  \n􀀃 X-POWR-Proj (site electrical)  \n􀀃 X-MECH-Proj (site mechanical)  \n􀀃 X-STRC-Proj (site structural)  \nKing","cbCaibU2d3BpsMx5","https://ap.wps.com/l/cbCaibU2d3BpsMx5","pdf",480076,12,"English","# Drawing Guidelines\n## Overview\n## General Drafting Guidelines\n# Annotation\n## Annotation Styles\n## Annotation Objects\n# Creating Civil 3D Data in Xrefs\n# Layers\n## Horizontal Construction & Site Plans\n# Colors\n## Layer Color Guidelines\n# Callouts, Detail Numbering and Section Lettering\n# Drawing Numbering System Key","[{\"question\":\"Why are coordinate systems and project standards emphasized in these CAD guidelines?\",\"answer\":\"To maintain accuracy, support reliable exchange of design information, and enable collaboration across the project team and disciplines.\"},{\"question\":\"How should design drawings and XREFs be organized for plan production?\",\"answer\":\"Design drawings are created in model space and referenced into sheet drawings. Base and overlay drawings are externally referenced into working files as XREFs for plan production.\"},{\"question\":\"What are the key drafting and file-structure rules for site drawings?\",\"answer\":\"Site drawings should use world UCS, define 0,0 and coordinates from the X-Base survey/conditions when available, avoid drawing on reserved layers (like layer 0 and defpoints), and create each discipline/site element as separate XREF overlay files with the specified naming format.\"}]","King County Metro CAD Standards - March 2024 | PDF"]