BOE CADD STANDARDS

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Transcript of BOE CADD STANDARDS

Department of Public Works
1149 S Broadway, Los Angeles, CA 90015 October 18, 2018 Page | 2
Bureau of Engineering
CADD Standards
Preface The Bureau of Engineering is committed to improving the quality of project delivery offered to all our Clients. By producing electronic design data consistently, communication among designer, owner and contractor can be streamlined resulting in cost savings and greater project efficiency. In an organization as large and diverse as the Bureau of Engineering, developing, maintaining and
implementing new CAD standards can be a daunting task however, the alternative of poor consistency,
unpredictability and inaccuracy of contract drawings can result in significant capital cost. Any attempt at
the task of standardization unquestionably results in not meeting the needs of all users in all cases. To
minimize the transition challenges, this manual was developed through a consensus of a variety of Bureau
CADD users, Engineers and Architects and in close compliance with the National CAD Standard. Tools &
Resources were also developed and are available on the Bureau’s website.
The goal of this document is to enhance the standardization of BOE drawings and digital files while reaffirming compliance with the latest National CAD Standard published by the National Institute of Building Sciences. This Standard will serve as a foundation for information sharing and enhancing coordination between the designer, engineer, contractor and owner. It will also be used as a basis for future development of BIM workflows and 3D Modeling standards for the Bureau of Engineering. In this document the acronym CADD will be used repeatedly. CADD is defined as Computer Aided Drafting
& Design. The Bureau has recognized that the evolving nature of computer design technology is obscuring
the divide between Drafting, Design and Engineering Analysis. Modern CADD tools do far more than
drafting; now requiring Engineers, Architects and Owners to become competent users. At the same time
however, the standardization of plan production remains of top importance to be successful in
implementing advance uses of modern technology.
The CADD Standards Committee is committed to the continued improvement and enhancing the usability
of this standard. To be successful, we are reliant upon the cooperation and participation of all Bureau
professionals. To the extent possible, we request that you structure your projects and data in accordance
with this Standard, augmenting it only in those cases where your project cannot be sufficiently classified,
organized or represented according to it. Compliance will ensure your project data can be freely exchanged
with other Bureau divisions and adopters of this Standard.
Version updates: To denote changes from version to version, a delta (Δ) will be placed where material has
been deleted and red text where material has been added or revised.
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1.2 Library Files ..................................................................................................................................... 15
1.3.1 Sheet Naming ..................................................................................................................... 16
2.0 Sheet Organization .................................................................................................................................... 20
2.1 Sheet Size ........................................................................................................................................ 20
2.2.4 Note Area ........................................................................................................................... 24
2.2.5 Cover Sheet ........................................................................................................................ 25
2.3 Supplemental Sheets ...................................................................................................................... 26
3.0 Drawing Conventions ................................................................................................................................ 27
3.1 Drawing Standards .......................................................................................................................... 27
3.1.2 Grid System ........................................................................................................................ 31
3.1.3 Coordinate Systems ............................................................................................................ 32
3.1.4 Drafting Precision ............................................................................................................... 33
3.1.5 Scales & Units ..................................................................................................................... 34
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3.2.4 Sheet Type 4 - Large-Scale Views ....................................................................................... 78
3.2.5 Sheet Type 5 - Details ......................................................................................................... 79
3.2.6 Sheet Type 6 - Schedules and Diagrams ............................................................................. 81
3.2.7 Sheet Types 7- Isometrics ................................................................................................... 82
3.2.8 Sheet Type 8 - 3D Representations .................................................................................... 83
3.3 Mock-up Drawing Set ...................................................................................................................... 86
3.3.1 Mock-Up Set Procedures .................................................................................................... 86
3.3.2 Mock-Up Worksheet .......................................................................................................... 88
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5.4 Sheet Keynotes................................................................................................................................ 98
6.1.6 Notes Column ................................................................................................................... 104
6.2.1 Simple vs. Expanded Schedules ........................................................................................ 105
6.2.2 Column Identifiers ............................................................................................................ 106
7.0 Terms & Abbreviations ........................................................................................................................... 109
8.1 Layer Properties ............................................................................................................................ 110
8.1.3 Discipline Designator, LEVEL 1.......................................................................................... 112
8.3 Annotation Layer List .................................................................................................................... 116
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8.4 Layer Colors ................................................................................................................................... 117
8.5.1 Adding New Layers to the Template ................................................................................ 118
9.0 Codes ....................................................................................................................................................... 119
9.3.2 Federal Regulations .......................................................................................................... 124
9.4 The Design Process........................................................................................................................ 127
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1.0 Project Folder Structure
Organizing project files effectively and consistently is critical to the success of design, plan production and
data reuse potential among Divisions, City Agencies, Design Consultants and Contractors. Without adequate
project controls, the ability to manage the quantity, storage directory and content of files significantly
reduces. The computer operating systems folder or directory tools are relied upon for effective project data
management.
Typically, several projects at different stages are stored on a server at any given time. PC operating systems
software will not allow two identical file names to exist in the same folder in the system. Therefore, several
separate folders are required to store similar data types for different projects.
Quite commonly, many Divisions within the Bureau of Engineering (BOE) store CAD and associated reference
files in a separate directory (and some Divisions a different server) than other project data. This provides
more flexibility and control of these critical project files as well as minimizes the potential for inadvertent
corruption of data by an inexperienced user. See Figure 1.0-1.
Figure 1.0-1 Project Folder
Most BOE and City projects are linked to a project work order for expense tracking and other metrics,
additionally, most BOE projects are assigned a Capital Improvement Project (CIP) number containing less
characters than a Work Order. Logically, these two assigned values are used as the primary identifiers for a
project folder. See Figure 1.0-2 for typical project path and folder name structure.
Figure 1.0-2 Typical Project Path and Folder
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CADD Standards
Note: When more than one Work Order is associated with a project, a primary Work Order shall be
designated and subsequently displayed first on all project documents.
The National CAD Standard recommends 8 characters for a project folder name. For convenience, however,
some BOE Divisions add the CIP number as a suffix since most projects are identified by CIP number in
conversation. Using a work order is required while using the CIP number is optional. Once the decision has
made whether to include the CIP number or not, all project folders shall be name accordingly and
consistently across the entire Division.
The next level of subfolders called “phase folders” should consist of names identifying the progression of the
project according to BOE’s five established project phases (Pre-Design, Design, Bid & Award, Construction
and Post Construction). Archive files are created as the project progresses from phase to phase. Although
archive data is desired and valuable, to minimize duplicate file creation and data storage requirements,
several phases of data are contained in the Design phase folder. See Figure 1.0-3. It is acceptable to separate
the Pre-Design and Bid & Award phases of the project if appropriate for the Division or project. Their
subfolder structure should match the Design folder.
Figure 1.0-3 Design Phase Folder
Within the phase folders are the “discipline folders”. See Figure 1.0-4. The number of disciplines within a
phase folder is dependent on the disciplines involved on the project and the software used for plan
production. A numeric prefix value is added in front of each discipline to reflect the order in which disciplines
are organized in a construction plan set. If a discipline is not relevant to the project the folder may be deleted.
The numerical prefix value, however, should remain the same to allow for adding and deleting necessary
disciplines as the project progresses.
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Bureau of Engineering
Figure 1.0-4 Discipline Folders
In the BOE, there are two broad design types, “Traditional (2D)” design and “Model-Based” design. The BOE
currently uses Autodesk AutoCAD® for Traditional design projects. For Model-Based designs, the BOE uses
various Autodesk platforms including, REVIT®, Civil 3D®, Plant 3D® and Architecture®. This manual covers
the folder structure for Traditional (2D) design projects only. Supplemental manuals are being developed
(in conjunction with these guidelines) for each primary model-based production software used in the BOE.
A projects design type and the associated manual should be verified before initiating CADD work.
Traditional CADD data includes the following file types: Model, Sheet, Schedule, Base Map,
Substructure/Utility Map, Survey, Detail, Text, Border, Title Block, Symbols, Database, Rasters, Images,
Miscellaneous, and Records.
To reduce folder creation, making files identifiable by name rather than directory is desired; therefore, each
discipline should store their respective data using the file naming convention outlined in this manual. Files
are stored in the locations identified in Figure 1.0-5.
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Most BOE projects include several Disciplines with different folder requirements. The intent of this guideline
is to be comprehensive and flexible. This project folder structure should be considered a minimum
requirement to ensure adequate design data segregation. If a Division, Consultant, or Contractor requires a
project-specific modification or blanket variance from these requirements, it should be approved by the
impacted Division Manager(s), CADD Manager(s) and Design Manager(s) (if applicable) prior.
1.1 File Naming Conventions
has since transitioned to distributing contract documents via the digital equivalent, a Portable Document
File (PDF). These files show the same information as printed paper. Elements, however, are readable by
electronic display devices and have increased intelligence.
The universal reading ability of the PDF format has provided new opportunities for Agencies and Contractors
to share, store and update necessary project information more efficiently and sustainably. To maximize this
opportunity and effectively manage vast amounts of data, it is important to have consistent digital file
naming and project folder organization of graphical and non-graphical information. Other benefits include
increased data reuse potential for Designers, Contractors, Operators and Maintenance staff of a facility.
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CADD Standards
Before exploring the file naming conventions, we will first discuss the different file types associated with a
typical AutoCAD project.
There are two categories of files. Project files and Library files. The primary difference is that Library files are
used across projects while Project files typically are not. Since the requirements and use for each Bureau
Division’s library varies greatly, each Division is responsible for establishing its individual library standards
within the parameters of these guidelines.
1.1.1 Project File Types Segregating data increases project flexibility and maximizes the number of users able to work concurrently
on a single project. Furthermore, the type of file being created to properly name the file, as this directly
impacts the name, is important to understand. Traditional BOE project data should be segregated according
the following file types: Model, Sheet, Schedule, Base Map, Utility Map, Survey, Detail, Text, Border, Title
Block, Database, Raster, As-Built, Image, Archive, and Miscellaneous. Library file naming conventions are
discussed in a later section. Each file type is defined as follows:
A Model File contains 2D or 3D graphic representation of physical “real-world” items in “real world” scale,
things you would eventually be able to touch in the completed facility. These components are drawn in
"Model Space". Model Files never have a border.
A Sheet File is typically comprised of a border template, text, symbols, notes and views of model files,
representing everything that appears on the final sheet. Sheet Files always have a border.
A Schedule File, unlike Model Files and Sheet Files, may be created by word processing or spreadsheet
software, or may be drawn in CAD or BIM software. In CADD, schedules created in Word, Excel or Access
software are "linked" into a Model or Sheet file for dynamic updating behavior in accordance with the
workflow described in Appendix E 16.2 Linking Schedules to Drawings. This allows a user to revise schedules
outside of the CADD software. If the schedule is not generated by the CADD platform, then it should be
inserted, referenced, linked or embedded to the appropriate sheet file.
A Base Map File is a collection of record data, survey topography and/or imagery that forms the background
setting for a project. The base map typically includes information such as road limits, building footprints,
right of way, easements, primary structures, ground contours, etc. This information is used to provide
background details necessary to orient the project.
A Utility Map File is a collection of utility record data that forms the background setting for existing
underground utilities in a project. The utility map is typically overlayed on a base map file to determine the
existing utility conditions around the project.
A Survey File is typically provided in two files, an AutoCAD .dwg file, which typically includes geolocated
topography, points and features and an .xml file that can be imported into Civil 3D as a Surface and used to
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CADD Standards
analyze existing ground conditions. The survey files usually are provided by a third party and should not be
manipulated by the CAD designers. If edits are required due to missing features or poor surface triangulation,
send a correction request to the Surveyor of Record. Survey data supersedes base map information therefore
base maps should be regularly updated to reflect latest survey information.
A Detail File is a specific type of model file that includes plans, elevations, sections, and detail views. A detail
file is required if the view is not derived directly from the project model. They make up the majority of the
individual files in a project folder.
A Text File may be general notes, discipline specific notes, sheet type specific notes (for example, notes that
always apply only to foundation plans), and abbreviations. Word processing software is normally used to
create Text Files.
A Border File contains the surrounding linework that defines the printing area and window limits. The
standard BOE Border file is available for download on the BOE homepage
A Title Block File contains project data and associated gridlines including project location, client, designer,
logos, sheet identification, and sheet management information.
A Database File include tables that define and label "fields" (columns and rows) of data. The process of
creating a table requires that each field be labeled uniquely, and that the allowable kind of data be identified
(for example, whether or not field values must be alphanumeric, text, graphics, calendar dates, integers, real
numbers, etc.). Spreadsheet and database software also lets the creator define valid ranges of values for the
fields.
A Raster File is graphics or a bitmap image representing a generally rectangular grid of pixels, or points of
color. Raster images are stored with image files with varying formats.
An As-Built File is typically a .tif or .pdf file that reflects all changes made in the specifications and working
drawings during the construction process, and are intended to show the exact dimensions, geometry, and
location of all elements of the work completed under the contract. These files are typically downloaded from
the BOE Vault or provided by the Owner of the facility.
An Image File is a file that contains graphics data.
An Archive File is a copy of a file created to record the state of a project for potential reuse in the future. As
each drawing reaches a milestone, it should be copied to the archive folder. Weekly archival backups are
highly recommended. Password restriction to a limited number of qualified people who can responsibly
manage the task is mandatory.
A Miscellaneous File is anything not described above that must be used in the completion of a project.
A Record File is a document that must be kept for evidence, compliance, risk management, etc. related to
CADD.
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CADD Standards
1.1.2 Project File Naming For all given projects, Project File naming must be consistent. Consistency in file naming is vital for overall
file and folder management, quicker retrieving and filtering files, and determining the content of a document
to be known without opening the file. Project files as described in section 1.1.1 are to be segregated and
named using the Naming Convention and File Type and Naming Key shown in Figures 1.1.2-1 and 1.1.2-2.
File Type Naming Convention (e.g.)
Model
Sheet
Schedule
Figure 1.1.2-1 Naming Convention
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CADD Standards
The BOE Naming Convention shown in Figure 1.1.2-1 consists of the Capital Improvement Project number (
), followed by the Discipline Designator ( ), the Project File Type ( ) in accordance with
Figure 1.1.2-2, the discipline subset ( ), which may include the sheet number ( ); a view (
) designation, grid number ( ), or year-month-day ( ) and lastly a user defined
field ( ).
Abbreviation Description Abbreviation Description
MD Model MS Miscellaneous
SH Sheet EXT Extension
BM Base Map D Discipline
UM Utility Map DS Discipline Subset
VF Field Survey V View
DT Detail USERD or USERDEFI User Defined
TX Text DS## Discipline Subset Sheet Number
BRDR Border YYMMDD Year-Month-Day
DB Database D12345 Index Number
RS Raster ## Page Number
Figure 1.1.2-2 File Type and Naming Key
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1.2 Library Files
Library files are those used across multiple projects. They can be base maps, imagery, utility map, detail,
schedule, text, database, symbol, border, and title block files. Manufacturers, suppliers, vendors, and all
associated parties who create Library Files for use on multiple projects shall create Library Files in full
compliance with the United States National CAD Standard® drawing and naming conventions. The naming
of these files shall follow either the MasterFormat™ or UniFormat™ file naming method as described below.
Note: Library file types are not project specific.
1.2.1 Library File Types A Schedule file provides project data in a tabulated format. Unlike Model Files and Sheet Files, Schedule Files
may be created by word processing or spreadsheet software.
A Symbol file is a standard graphic representation of an item or materials by association, resemblance, or
convention. A symbol often represents a material or object not fully illustrated on the drawings. They have
a role in creating, understanding, and fulfilling the intent of construction documents. Standard symbols
ensure clear and concise communication among the lead designer, owner, contractor, and consultants.
Refer to section 4.0 Symbols for an explanation of symbol types in detail.
A Block file is a collection of objects that are combined into a single named object.
A Plot Style table file contains several of the plot settings used when plotting a drawing. You can use a table
to reduce the number of redundant steps you need to perform each time you plot a drawing.
Note: Refer to section 1.1.1 for additional file types.
1.2.2 Library File Naming The naming of Library files follows the Bureau’s latest adoption of the Construction Specification Institutes
MasterFormat™. Any outside Consultant or Contractor who creates a Library file for a project should consult
that Division’s standard for Library file naming and be in full compliance. MasterFormat™. A numbering
system based on MasterFormat™ is recommended for naming most library files. Refer to Figure 1.2.2-1. A
numbering system based on UniFormat™ is also acceptable if otherwise multiple MasterFormat™ numbers
are required. If using the MasterFormat™ or Uniformat™ are not appropriate for the library file type, the file
shall be named in accordance with the Project file naming convention.
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Figure 1.2.2-1 Library File Naming
Library Files should not be edited directly for a project. The file should be copied into the project folder and
named according to the project file naming convention.…