ATT0003 2.5 item b 24-004 USAISEC Drafting Guide 12 March 2024.pdf

TR No. ELIE-ISE-TD 24-004

U.S. ARMY

INFORMATION SYSTEMS ENGINEERING COMMAND

DRAFTING GUIDE

BY

TECHNICAL DIRECTOR

FEBRUARY 2024

Distribution C Distribution authorized to U.S. Government agencies and their contractors for administrative or operational use, February 2024. Refer other requests for this document to Commander, U.S. Army Information Systems Engineering Command, ATTN: ELIE-ISE-TD, Fort Huachuca, AZ 85613-5300.

TR No. ELIE-ISE-TD 24-004, February 2024 ii

U.S. Army Information Systems Engineering Command ● 2133 Cushing Street ● Fort Huachuca, AZ 85613-5300

DISCLAIMER

The use of trade names in this document does not constitute an official endorsement or approval of the use of such commercial hardware or software. Do not cite this document for advertisement.

CHANGES

Refer requests for all changes that affect this document to:

USAISEC, ATTN: ELIE-ISE-TD, Fort Huachuca, AZ 85613-5300.

DISPOSITION INSTRUCTIONS

Destroy this document when no longer needed. Do not return it to the organization. Safeguard and destroy this document with consideration given to its classification or distribution statement requirements.

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CUI

U.S. ARMY

INFORMATION SYSTEMS ENGINEERING COMMAND

BY

TECHNICAL DIRECTOR

FEBRUARY 2024

U.S. ARMY INFORMATION SYSTEMS ENGINEERING COMMAND

BRIAN ADELSON

Senior Subject Matter Expert

USAISEC

K. BRIAN GOLD

Technical Director

USAISEC

Distribution C Distribution authorized to U.S. Government agencies and their contractors for administrative or operational use, February 2024. Refer other requests for this document to Commander, U.S. Army Information Systems Engineering Command, ATTN: ELIE-ISE-TD, Fort Huachuca, AZ 85613-5300.

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EXECUTIVE SUMMARY

This document establishes uniform practices for the preparation and drafting of engineering drawings within the U.S. Army Information Systems Engineering Command (USAISEC). This document is primarily based upon U.S. Army Corps of Engineers (USACE) drafting guidelines and the National Computer-Aided Design (CAD) Standard (NCS), modified to support complex telecommunications projects.

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TABLE OF CONTENTS

Page

1.0 Introduction

1.1 Background

1.2 Scope

1.3 References

2.0 Drawing Set

2.1 General Guidance

2.2 USAISEC Drawing Set Organization

2.3 Project Site Identifier

2.3.1 Theater Identifier

2.3.2 State/Country Defense Information Systems Agency (DISA) Code

2.3.3 DISA Location Code (TriCode)

2.3.4 Building Number

2.4 Drawing Number

2.4.1 Drawing Type

2.4.2 Drawing Author

2.4.3 Sequential Numeric Designator

2.5 Sheet Number

2.5.1 Sheet Identification in the NCS

2.6 Drawing Set Sequence

2.6.1 Always Required Initial Drawings

2.6.2 Equipment/Material

2.6.3 System Overview

2.6.4 Physical Location – Broad to Detailed

2.6.5 External Infrastructure

2.6.6 Equipment-Supporting Infrastructure

2.6.7 Build/Installation Details

2.6.8 Circuit and Wiring Details

2.6.9 Distribution

2.6.10 Antennas/Towers

2.6.11 Miscellaneous

2.6.12 Testing

2.6.13 Standard Drawings

2.7 Drawing Development Phases

2.7.1 Draft Drawings

2.7.2 Planned Drawings

2.7.3 As-Built Drawings

2.7.4 Redline

2.7.5 Drawing Revisions

3.0 Drafting Guidance

3.1 Model Space and Paper Space

3.2 Model Space Drawing Scale

3.3 Paper Space Scale

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3.4 Viewport Scales

3.5 Sheet Sizes

3.6 Sheet Layout

3.7 Number Format and Measurement Precision

3.8 Text Font and Sizing

3.9 Lines

3.9.1 Line Usage

3.9.2 Line Types

3.9.3 Line Colors

3.9.4 Line Widths

3.10 Annotative Objects

3.10.1 Dimensions

3.10.2 Labels

3.10.3 Leaders

3.10.4 Find Number Leaders

3.10.5 Border

3.10.6 Legend

3.10.7 General Notes

3.10.8 Sheet Notes

3.10.9 Title Block

3.10.10 Revision Information

3.10.11 Revision Status of Sheets

3.10.12 Associated List of Materials

3.10.13 Classification Markings

3.10.14 Titles

3.10.15 Tables

3.10.16 North Arrow

3.10.17 Graphic Scale

3.11 Symbols

3.11.1 NCS

3.11.2 USACE

3.11.3 ANSI/ISO/IEEE Standards

3.11.4 IEC 60617 Database

3.11.5 Other Industry Standards

3.11.6 Predominant Industry Manufacturers

3.12 Abbreviations

3.13 Layers

3.14 External Files

3.14.1 Copied Content

3.14.2 Externally Referenced Content

3.15 USAISEC Drafting Quick Guide

3.16 USAISEC Drawing Template

3.17 Publishing Drawings

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Appendices APPENDIX A. USAISEC Drafting Quick Guide and Drawing Template ................ A-1 APPENDIX B. DISA Location Information ............................................................. B-1 APPENDIX C. NCS Sheet ID Conversion Guide .................................................. C-1 APPENDIX D. NCS Discipline Designators ........................................................... D-1 GLOSSARY. Acronyms and Abbreviations ................................................ Glossary-1

Tables

Table 1. References Table 2. Geographic Location Codes Table 3. Drawing Author Codes Table 4. Drawing Types and Sequence Table 5. Redline Markup Table 6. NCS Commonly Used Scales Table 7. AutoCAD Default Line Types Table 8. Index Colors Table 9. Line Widths and Usage Table 10. Recommended Placement of Annotative Objects Table 11. Example Layer Table for Floor Plan Drawing Table A-1. USAISEC Drafting Quick Guide ........................................................... A-1 Table A-2. USAISEC Drawing Template ............................................................... A-1 Table B-1. Africa Location Information .................................................................. B-1 Table B-2. Central Region Location Information ................................................... B-2 Table B-3. Europe Location Information ................................................................ B-4 Table B-4. Pacific Location Information ............................................................... B-13 Table B-5. Undetermined Global Location Information........................................ B-18 Table B-6. Western Hemisphere Location Information ........................................ B-19 Table C-1. Sheet Type Designators ...................................................................... C-2 Table C-2. USAISEC to NCS Drawing Conversion ............................................... C-3 Table D-1. Level 1 Discipline Designators ............................................................. D-1 Table D-2. NCS Level 2 Discipline Designators .................................................... D-1

Figures Figure 1. USAISEC Drawing Set Hierarchy Example Figure 2. Project Site Identifier Format Figure 3. Drawing Number Format Figure 4. Standard USAISEC Sheet 1 Layout Figure 5. Standard USAISEC Continuation Sheet Layout viii

Figure 6. USAISEC Custom Short Break Line Type Figure 7. USAISEC Custom Long Break Line Block Figure 8. Dimensions Figure 9. Text Orientation Figure 10. Leaders Figure 11. Find Number Leaders Figure 12. Border Figure 13. Drawing Legend Figure 14. General Notes Figure 15. Sheet Notes Figure 16. Sheet 1 Title Block Figure 17. Continuation Sheet Reduced Title Block Figure 18. Revision Information Figure 19. Revision Status of Sheets Figure 20. Associated List of Materials Figure 21. Figure Title Figure 22. Table Title Figure 23. Section Title Figure 24. View Title Figure 25. Detail Title Figure 26. North Arrow Figure 27. Graphic Scale (1” = 100’) Figure C-1. NCS Sheet Identification Format ........................................................ C-1

U.S. ARMY INFORMATION SYSTEMS ENGINEERING COMMAND

1.0 INTRODUCTION

1.1 Background

The U.S. Army Information Systems Engineering Command (USAISEC) developed this drafting guide to provide a baseline for the development of engineering drawings within USAISEC. This guide was developed using material from the National Computer-Aided Design (CAD) Standard (NCS) and is intended to work in conjunction with the drafting standards used by the U.S. Army Corps of Engineers (USACE) for Military Construction, Army, (MCA) projects. The intent of this guide is to standardize USAISEC drafting practices and processes with the NCS as a foundation, incorporating standards from USACE, American National Standards Institute (ANSI), International Organization for Standardization (ISO), Institute of Electrical and Electronics Engineers (IEEE), International Electrotechnical Commission (IEC), and other industry.

1.2 Scope

This guide provides a standardized format and scheme for drafting of engineering drawings created by USAISEC employees and Contractors and will allow for standardization of drawings. The document includes general drafting guidelines for USAISEC to be implemented over the framework established by the NCS. It is understood that this guide cannot address every situation, so if your project or program requires deviation from this guide, a waiver from the USAISEC Technical Director (TD) is required.

A Waiver Request Form is available in the TD’s SharePoint Library.

Some long-term programs have developed specific processes, which may continue to be used. Guidance for specific USAISEC programs is identified in the appendices of this guide. When it is a joint project with another organization that implements a different standard or diverges from the USAISEC standard, the organizations shall coordinate modifications to establish a common CAD standard for the project.

If not explicitly modified in this guide, all USAISEC drawings shall comply with the NCS.

1.3 References

The publications applicable to this document herein are listed in Table 1.

Table 1. References Document Name Description

NCS National CAD Standard, version 6

ERDC/ITL TR-19-6 USACE Architectural, Engineering, and Construction (A/E/C) Graphics Standard, release 2.1

ERDC/ITL TR-19-7 USACE A/E/C CAD Standard, release 6.1 ASME Y14.100-2017 Engineering Drawing Practices ASME Y14.1-2020 Drawing Sheet Size and Format ASME Y14.2-2014 (R2020) Line Conventions and Lettering ASME Y14.3-2012 (R2018) Orthographic and Pictorial Views ASME Y14.5-2018 Dimensioning and Tolerancing ASME Y14.6-2001 (R2018) Screw Thread Representation ASME Y14.24-2020 Types and Applications of Engineering Drawings ASME Y14.34-2013 (R2018) Associated Lists

Table 1. References Document Name Description

ASME Y14.35-2014 (R2019) Revision of Engineering Drawings and Associated Documents ASME Y14.38-2019 Abbreviations and Acronyms for Use in Product Definitions and Related Documents ASME Y14.41-2019 Digital Product Definition Data Practices

ANSI Y32.9-1972 (R1989) Graphic Symbols for Electrical Wiring and Layout Diagrams Used in Architecture and Building Construction

IEEE STD 260.1-2004 (R2010) Standard Letter Symbols for Units of Measurement

IEEE STD 260.3-1993 (R2012) American National Standard Mathematical Signs and Symbols for Use in Physical Sciences and Technology

IEC 60617 DATABASE Graphical Symbols for Diagrams AWS A2.4:2020 Standard Symbols for Welding, Brazing, and Nondestructive Examination

ASHRAE 134-2005 Graphic Symbols for Heating, Ventilating, Air-Conditioning, and Refrigerating Systems

IEEE STD 91/91A (R1994) Standard Graphic Symbols for Logic Functions

NFPA 170-2024 National Fire Protection Association Standard for Fire Safety and Emergency Symbols

ASTM SI10-2016 American National Standard for Metric Practice

Access to the NCS is restricted to USAISEC employees and is available in the references folder accompanying this drafting guide.

Engineering Research and Development Center (ERDC)/Information Technology Laboratory (ITL) standards from USACE are available in the References folder accompanying this drafting guide, as well as publicly available at the USACE Knowledge Core online:

ERDC/ITL TR-19-6: https://erdc-library.erdc.dren.mil/jspui/handle/11681/33814 ERDC/ITL TR-19-7: https://erdc-library.erdc.dren.mil/jspui/handle/11681/33829 As of this document, access to all other references listed in Table 1 are available to USAISEC employees through Accuris (formerly IHS) Specifications and Standards database. This is accessible through milBook at the following link:

https://www.milsuite.mil/book/groups/access-to-commercial-standards/pages/amc-access https://erdc-library.erdc.dren.mil/jspui/handle/11681/33814 https://erdc-library.erdc.dren.mil/jspui/handle/11681/33829 https://www.milsuite.mil/book/groups/access-to-commercial-standards/pages/amc-access

2.0 DRAWING SET

2.1 General Guidance

The overarching organizational scheme in the NCS Uniform Drawing System (UDS) is designed to accommodate all fields of engineering and developmental drawings and is not entirely applicable to the Information Technology (IT) system designs produced by USAISEC. The following sections describe the naming, numbering, and organizational system for USAISEC developed drawing sets. For matters not addressed by this document, refer to the UDS for supplementary drawing set organization guidance. The developed structure is intended to facilitate the integration of the USAISEC-developed IT system designs with architectural and construction drawing sets into a comprehensive functional design, particularly when associated with MCA projects.

2.2 USAISEC Drawing Set Organization

USAISEC drawing sets are organized in a three-level hierarchical structure. The top tier encompasses all drawing files, is termed the “drawing set”, and is distinguished by a Project Site Identifier (see section 2.3). The second tier, falling within a drawing set, are individual drawing files (AutoCAD *.dwg) referred to simply as “drawings”, and are identified by a drawing number (see section 2.4). The bottom tier consists of sheets within a drawing file, termed “sheets”, and are identified by both the drawing number and sheet number. Sheet numbers are written “Sheet X of Y”, with X being the current sheet and Y being the total number of sheets within that drawing. See Figure 1 for an example hierarchy of a USAISEC drawing set consisting of three drawings: a floor plan with 2 sheets, a rack elevation with 1 sheet, and an installation details drawing with 3 sheets.

EDEPTMB2383Project Site Identifier

EDEPTMB2383-FP90001 EDEPTMB2383-RE90001 EDEPTMB2383-IN90001

EDEPTMB2383-FP90001 Sheet 1 of 2

EDEPTMB2383-FP90001 Sheet 2 of 2 EDEPTMB2383-RE90001 Sheet 1 of 1

Drawing Number

Sheet Number EDEPTMB2383-IN90001 Sheet 1 of 3

EDEPTMB2383-IN90001 Sheet 2 of 3

EDEPTMB2383-IN90001 Sheet 3 of 3

Figure 1. USAISEC Drawing Set Hierarchy Example

2.3 Project Site Identifier

The project site identifier is an alphanumeric code that will prefix all individual site documentation filenames and should be used for the name of the folder containing all the relevant electronic files that are components of the drawing set. It consists of four subsections: Theater Identifier, State/Country Code, Location Code, and Building Number.

EDEPTMB2383-

Theater

Identifier State/Country

DISA Code DISA Location

Code Building Number

Figure 2. Project Site Identifier Format

2.3.1 Theater Identifier

The first field is a one-character field for the geographic location or theater of operation in which the facility is physically located. Refer to Table 2 below for a list of theater identifiers. For further information, refer to Appendix B for individual site details, including theater identifiers.

Table 2. Geographic Location Codes Code Name Description

A Africa African Continent C Central Region Middle East and Central Asia E Europe European Area P Pacific Pacific, Alaska U Undetermined Global Global masked locations W Western Hemisphere Continental US, Canada, Central & South America

2.3.2 State/Country Defense Information Systems Agency (DISA) Code The second field is a two-character country or state code, established by the DISA, in which the facility is physically located. Refer to Appendix B for the list of DISA location information.

2.3.3 DISA Location Code (TriCode)

The third field is a three-character code, established by DISA, that identifies the facility.

Refer to Appendix B for the list of DISA location information.

2.3.4 Building Number

The fourth field is a varying length string consisting of the letter “B” followed by the building number as commonly identified by on-site personnel. The letter “B” is always included to act as a separator from the DISA Location Code. This is to prevent confusion in the instance that the DISA Location Code ends in a number, obfuscating the building number.

If the building number begins with the letter B, it should not be omitted. For example, the project site identifier for a project at Building B292 at Patch Barracks in Germany would be EDEPTMBB292. If the building does not have a designated building number, set this field to “B000”.

2.4 Drawing Number

Each drawing number will begin with the Project Site Identifier detailed in above followed by a hyphen and a 7-character alphanumeric code that consists of three subsections:

Drawing Type, Drawing Author, and Sequential Numeric Designator. The drawing number will also be used as the filename for the digital drawing.

Figure 3. Drawing Number Format

2.4.1 Drawing Type

The drawing type is a two-character code that identifies the content of the drawing. See section 2.6 for the list of drawing types and drawing type codes.

2.4.2 Drawing Author

The drawing author is a one-character code that identifies whether the drawing was internally or externally developed. Refer to Table 3 for the list of drawing author codes.

Table 3. Drawing Author Codes Code Description

9 Drawing prepared by a USAISEC employee 8 Drawing prepared by a USAISEC contractor 7 Drawing prepared externally to USAISEC

EDEPTMB2383-FP90001

Drawing Type

Drawing Author

9 – USAISEC

8 – USAISEC Contractor 7 – External to USAISEC

Sequential Numeric Designator

Project Site Identifier

2.4.3 Sequential Numeric Designator

Initial drawings of each type will begin with a sequential numeric designator of “0001”.

Subsequent drawings of each type will increment this designator by one. The need for multiple drawings of a given type (as opposed to additional sheets within the same drawing file) is left as a decision by the drafter to ensure clarity and organization in the resulting drawing package.

2.5 Sheet Number

Within a drawing, each sheet has a sheet number written “Sheet X of Y”, with X being the current sheet and Y being the total number of sheets within that drawing.

2.5.1 Sheet Identification in the NCS

To support the wide range of drawings required for different types and varying industries, the NCS uses a naming system wherein each individual sheet of a drawing set has a unique identifier. This sheet identifier (ID) is intended to convey the subject and content of the sheet by including fields titled “discipline designator” and “sheet type”. Of the 180 discipline designators defined by the NCS to support all possible project scopes, only approximately 20 percent of the discipline designators could be considered relevant for USAISEC projects. However, for the technically complex and numerous distinct drawing types required for typical USAISEC drawing sets, the two-character drawing type code (see section 2.6) used in USAISEC drawing numbers conveys the subject and content of a drawing to a more accurate level of detail than is available in the NCS sheet ID.

Consequently, while sheet IDs have been adopted by the USACE, they will not be adopted for USAISEC drawing sets. However, to enable the ability to work with drawing sets developed using NCS sheet identification or to provide drawing sets to customers that require NCS development standards, a guide has been established to enable conversion between the USAISEC drawing naming standard and the NCS sheet identification format. See Appendix C for further information.

2.6 Drawing Set Sequence

The drawings that will be included in a project drawing set are dependent upon individual project requirements. Table 4 indicates the general order and types of drawings within a drawing set, to be included as needed, determined by the engineering team. Each drawing type has a two-character identifier code that is used in the drawing number (see section 2.4). Every drawing set will, at a minimum, include a cover sheet and drawing index. Following table 4 is a list of each drawing type and a brief description of its purpose and components.

Table 4. Drawing Types and Sequence Sequence

Order Code Drawing Type Sequence Order Code Drawing Type

1 -- Cover Sheet 27 CR Cable Routing 2 DI Drawing Index 28 FD Fabrication Details 3 EL Major Equipment List 29 AD Assembly Drawing 4 LM List Of Materials 30 IN Installation Details 5 SY System Diagram 31 ID Interconnect Diagram 6 TN Network 32 CL Cable Running List 7 VM Vicinity Map 33 WD Wiring Diagram 8 BA Base Layout 34 CD Configuration Diagram 9 SP Site Plan 35 SC Schematic Diagram

10 BL Building Layout 36 PB Patch Bay 11 FP Floor Plan 37 DF Distribution Frame 12 WE Wall Elevation 38 AX Auxiliary Frame 13 RE Rack Elevation 39 TB Terminal Block Layout and Assignment 14 EF Equipment Face Layout 40 TE Terminal Strip Assignment 15 AE Architectural and Engineering 41 XC Cross Connect Diagram 16 OP Outside Plant 42 TD Trunking Diagram 17 BC Block Cable Records 43 TS Trunking Schematic 18 CV Cable Vault 44 TM Telephone Miscellaneous 19 MH Maintenance Hole Details 45 AT Antenna/Tower Details 20 PD Power Diagram 46 RA Restricted Area 21 GS Grounding System 47 RP Radiation Profile 22 LP Lighting Plan 48 MS Miscellaneous Details 23 AC Air Conditioning Plan 49 PH Photograph 24 AS Alarm System 50 TR Test Results 25 UP Unistrut Plan 51 STD Standard Drawing 26 RD Cable Rack Diagram

2.6.1 Always Required Initial Drawings

a. (1) Cover Sheet – Every drawing set shall include a cover sheet that clearly and fully identifies the program, type of project, and facility parameters, such as location and function. The cover sheet may also contain a short description of the scope or intent of the drawings within the set.

b. (2) Drawing Index – DI – The drawing index is the first drawing of a set and is a complete list of drawings for a project, site, or facility. Drawing number, title, number of sheets, latest revision, and remarks for each drawing are included.

2.6.2 Equipment/Material

a. (3) Major Equipment List – EL – The major equipment list is a tabulation of all key equipment required at a site. This list should include find number, manufacturer, part number, description, unit of issue, and quantity. Installation material is not listed in "EL" drawings. Associated lists of materials included on other drawings should be subsets of the major equipment list and the list of materials, retaining those original find numbers.

b. (4) List of Materials – LM – The list of materials is a tabulation of all material required for the installation of the equipment in the major equipment list. This list should include find number, manufacturer, part number, description, unit of issue, and quantity.

Find numbers in the list of materials must not overlap find numbers in the major equipment list. Associated lists of materials included on other drawings should be subsets of the major equipment list and the list of materials, retaining those original find numbers.

2.6.3 System Overview

a. (5) System Diagram – SY – The system diagram is a high-level view that shows the interrelationships and connectivity of the component elements of a system. This drawing typically uses labeled circles or rectangles to represent system elements with connections represented by lines. Symbols may be used to differentiate system components.

b. (6) Network – TN – Network drawings include details pertaining to both physical and logical network connectivity, architecture, and configuration.

2.6.4 Physical Location – Broad to Detailed

a. (7) Vicinity Map – VM – The vicinity map is a map that provides a broader context of the area of a site plan or base layout where work is to be performed and relevant details of the area are included. A vicinity map illustrates the physical relationship of the project facility to the surrounding area.

b. (8) Base Layout – BA – The base layout is a to-scale drawing which provides the base boundaries, including the placement of properties, roads, streets, railroads, waterways, runways, survey markers, and the location of project-relevant facilities. It may contain a grid overlay to serve as the key map for subsequent drawings. Grid lines should not cut through project-relevant facilities.

c. (9) Site Plan – SP – The site plan is a map view of the project facility and a plan view of the installation, including the location and dimensions of major components and the location of survey markers, antennas, and antenna azimuths. This drawing may show maintenance holes, ducts, underground and buried cables, aerial cables, and other facilities, when not provided on base layout or cable diagram drawings.

d. (10) Building Layout – BL – The building layout is a plan view that shows the arrangement and positioning of the component elements within the building. This drawing is typically a single line building outline showing all interior walls, partitions, and may also show power panels, power outlets, false ceilings, raised floors, and air-conditioning ducts.

It is drawn to scale using as many sheets and match lines as necessary, usually one sheet for each floor. Single lines represent inside walls; breaks in the lines represent internal and external access openings of the building. Electric power, water, heat, and ventilation service entrances or internal source locations are shown by symbols. Relevant facility and equipment locations are identified. Each room or area must be identified by room number and/or operational use. The type of building construction, composition of floors, walls, ceiling, floor capacity, ceiling heights, area floor space, and miscellaneous information is stated in drawing notes. Notes should also identify supporting floor plans.

A key map should be included identifying the location of the building as shown on the base layout map.

e. (11) Floor Plan – FP – Floor plan drawings show a detailed overhead view of one level or one part of one level of a structure, identifying interior dimensions, numerical designations, and operational uses of all rooms or areas. It should include wall thickness, direction of door swing, access openings, and location of all partitions and columns. The drawing title must include the numerical identification of the building, room number, area identification, base and/or site name and address. Any element of restriction to the installation, operation, or maintenance of equipment in this area should be noted in this drawing. Thicker line width should be used to indicate fronts of equipment. A key map should be included to identify the floor plan in relation to the building layout.

f. (12) Wall Elevation – WE – Wall elevation drawings include elevation views of shelter or building walls, showing all equipment, furniture, or accessories. Equipment must be identified by find number when an associated list of materials is used. The identification of the building, room, and wall location should be noted.

g. (13) Rack Elevation – RE – Rack elevation drawings include elevation views of equipment racks, consoles, and cabinets showing equipment arrangement and installation. Equipment must be identified by find number when an associated list of materials is used. The drawing must show shapes and sizes of compartments, assignments of space, and general mechanical and electrical details of component mounting. The identification of the building, room, equipment row, and cabinet designation, plus the operational use of the equipment should be noted.

h. (14) Equipment Face Layout – EF – Equipment face layout drawings detail the layout of the face and shelf arrangements for all types of communications-electronics equipment.

2.6.5 External Infrastructure

a. (15) Architectural and Engineering – AE – Architectural and engineering drawings show the design and engineering required for the manufacture of specific items such as structures, buildings, open areas, or equipment. They encompass construction requirements, manufacturing specifications, materials to be used, style, character, and aesthetic values. The information is definitive, precise, and to scale. These drawings are typically provided by the USACE for new buildings.

b. (16) Outside Plant – OP – Outside plant drawings detail components outside the facility including buried cable, underground conduit, maintenance holes, terminals, poles, and other features similar to outside plant facilities, to include cable numbers, number of pairs or fibers and terminal counts. Outside plant drawings are usually keyed to the grid established in the base layout drawing.

c. (17) Block Cable Records – BC – Block cable record drawings show the area of the outside plant in expanded views and in greater detail than outside plant drawings.

They show all pertinent details regarding the characteristics and routing of the cables and each building is identified. Block cable record drawings are keyed to these outside plant drawings.

d. (18) Cable Vault – CV – Cable vault drawings show the location, layout, racking, cabling, splicing, steps, access ports, and ceiling sleeves in a cable vault. The drawing should show the relationship of the vault to the building, as well as an elevation view showing length, width, headroom, and duct arrangement. It should also show the arrangement of cables on racks plus the approximate location of valves, pressure plugs, sleeves, and splices, and the manner in which the cables enter the vertical side of the main distribution frame, if applicable. Cables must be identified by cable or trunk number, cable count, and number of pairs or fibers.

e. (19) Maintenance Hole Details – MH – Maintenance hole details drawings show the information required to install underground cables in a specific maintenance hole.

These drawings include:

● A description of the maintenance hole including identifier (number) and type

● Inside dimensions (length, width, and headroom)

● Location of entry ports

● Details of cable racks, ladder (steps), and pulling irons

● Thickness of walls, roof, and floor

● Type of drainage

● Size and type of frame and cover

● Location of the length (in inches) of recesses in the maintenance hole wall

● Number, type, material, and the inside diameter of conduits

● Arrangements of cable on racks

● Approximate location of coil cases and other equipment pertinent to maintenance hole use

● Special maintenance holes should be identified as such and for what purpose

2.6.6 Equipment-Supporting Infrastructure

a. (20) Power Diagram – PD – Power diagram drawings consist primarily of single-line diagrams that show the ac and dc power systems, including both main and emergency/backup power systems. These drawings show connectivity from power generation through all levels of distribution to end user equipment. Information detailing circuit breakers, fuses, cabling, conduit, and other related hardware supporting facility power systems shall be included in power diagram drawings. Emergency/backup systems including uninterruptible power systems, automatic transfer systems, dc rectifiers, ac inverters, and battery stacks will be detailed. Control/monitoring systems will be identified and their connectivity to the power systems will be shown. Tabular data and notes shall be included to fully describe the facility power system.

b. (21) Grounding System – GS – Grounding system drawings depict all grounding systems associated with the facility inside and outside the building, including grounding and bonding of the electrical service system, as well as telecommunications systems.

This should include the entire facility ground system, including on-site power distribution, protective ground, ground, and earth electrode subsystem, as well as special emp protective ground, if any. These drawings should show the telecommunications bonding infrastructure that extends throughout the building including the primary bonding busbar, telecommunications bonding conductor, telecommunications bonding backbone, secondary bonding busbars, secondary bonding conductors, and backbone bonding conductors. Further, they show schematically how and where cable shields, equipment cabinets, individual equipment, and other devices are grounded and bonded. All specialized hardware and techniques used to provide grounding, such as the use of chemicals, counterpoises, ground rods, wells, etc. Should be noted and detailed.

Components should be identified by numerical designation and/or operational use.

c. (22) Lighting Plan – LP – Lighting plan drawings show the location of lighting components overlaid on a floor plan view. It will include type, quantity, size, installation type (flush, recessed, etc.) and other installation details of lighting fixtures. Drawings will include location of equipment racks and overhead cable trays in relation to lighting fixtures. Radio Frequency (RF) suppression devices will be identified, if used.

d. (23) Air Conditioning Plan – AC – Air conditioning plan drawings provide plan and elevation views of all air conditioning system components, including electrical conduit size and location, coolant line size and location, and air conditioning ducting and booster fan systems. Air conditioning drawings will be overlaid on a floor plan view that shows equipment rack layout and cable tray and duct systems.

e. (24) Alarm System – AS – Alarm system drawings detail the location, installation, and design of facility alarm system components, including equipment layout, installation requirements, cable runs, and interconnection details.

f. (25) Unistrut Plan – UP – Unistrut plan drawings provide a plan view of the Unistrut installed in the project area. Drawing will be superimposed on the floor plan drawing with equipment cabinet layout. A detailed view will be provided depicting the Unistrut cross section and mounting requirements. An associated list of materials should be included to identify all parts required for installation.

g. (26) Cable Rack Diagram – RD – Cable rack diagram drawings show the construction and placement of cable racks, runways, raceways, trays, ducts, etc., used to support power and data cabling. Diagrams should show an overhead plan view of the cable rack relative to equipment and building features. An elevation view may be used to supplement the plan view, for example, when installing a multi-level cable tray. Thicker line weights should indicate the cable rack, thinner line weights should indicate equipment and building features. Component details should be included as leader notes, drawing notes, and/or detailed in an associated list of materials.

h. (27) Cable Routing – CR – Cable routing drawings identify the physical path and installation requirements for all cables detailed in cable running list drawings. Both vertical and horizontal projections for path details are required, and information specifying cable support, protection, and fastening should be included. These drawings typically consist of multiple plan views, notes, tables, and detail views to provide sufficient installation instructions.

2.6.7 Build/Installation Details

a. (28) Fabrication Details – FD – Fabrication details drawings show all details relative to the manufacture, construction, and assembly of the subject items. Specifics are shown regarding size, shape, characteristics, and materials involved in the construction of the end item.

b. (29) Assembly Drawing – AD – Assembly drawings provide direction for equipment assembly. The information presented will include both drawing and narrative instructions for putting together items not pre-assembled. These directions will include drawings, details, materials (e.g. nuts, bolts, screws, wire), order of assembly, and any other data necessary to complete assembly of the equipment.

c. (30) Installation Details – IN – Installation details drawings show the specific information required to install, mount, secure, and/or connect (power, ground, etc.)

individual equipment, beyond what is available in manufacturer's instructions, including any deviations to standard installation requirements. An installation details drawing can consist of the contents of a standard (std) drawing that have been modified for unique installation requirements.

2.6.8 Circuit and Wiring Details

a. (31) Interconnect Diagram – ID – Interconnect diagram drawings are functional diagrams of blocks and lines that show the physical connections of the components of a system, often portraying a visual representation of the cable running list (CL).

b. (32) Cable Running List – CL – Cable running list drawings are lists that identify, in tabular form, the origin, path and termination of all cables (signal, power, protective ground, signal ground, rf cables and waveguides, control and intercom) in a system.

Equipment information at the origin and termination will include location (room, cabinet, rack unit (RU)) and port details (type, location, designator). Path information will include connector details for each end and cable details (type, length, size, and designator).

c. (33) Wiring Diagram – WD – Wiring diagram drawings show the relative physical connections to each piece of equipment, detailed to the specific port, lug, module, etc.

d. (34) Configuration Diagram – CD – Configuration diagram drawings detail information for use in the physical configuration of installed equipment.

e. (35) Schematic Diagram – SC – Schematic diagram drawings show the functionality and connectivity between different electrical components. Equipment manuals contain schematic diagrams and will be retained separately as part of project documentation. When equipment manuals are not available, e.g., when an army depot fabricates a special piece of equipment, the schematic should become part of the drawing package.

2.6.9 Distribution

a. (36) Patch Bay – PB – Patch bay drawings consolidate details of the patch panel layout, port numbers, connectivity, circuit information and the patch arrangement for normal and alternative configurations for all patch panels in each patch bay.

b. (37) Distribution Frame – DF – The distribution frame drawing shows the placement, layout, arrangement, and numbering of each main, intermediate, and combined distribution frame. It must identify terminal blocks and cable run numbers of all cable runs to the frame, as well as terminal block designations. The location and identification of protectors and terminal strips on a frame should be included whether these are in use or reserved for future use. Test jacks must be indicated, and detail views presented if those terminal strips serve more than one circuit. Only one distribution frame drawing set for each building is typically prepared. Each sheet of the drawing will show only one distribution frame.

c. (38) Auxiliary Frame – AX – Auxiliary frame drawings detail any distribution frame that cannot be identified as part of a main, intermediate, or combined distribution frame.

The same drawing criteria as stated for distribution frame (DF) will apply.

d. (39) Terminal Block Layout and Assignment – TB – Terminal block layout and assignment drawings identify each terminal block in a distribution frame, its function, and where the other end of the cables terminate or originate. This drawing will include pictorial views of the blocks and the frame, identification of the blocks, and pertinent information in notes or tabular form. All spare blocks, terminals, wires, and cables are identified. Data included in these drawings are to be used in conjunction with cable running list drawings for installation and maintenance.

e. (40) Terminal Strip Assignment – TE – Terminal strip assignment drawings will include location, installation, and design details, along with wiring assignment, pictorial views of the terminal strips, terminal strip identifiers, and relevant details in note or tabular form. All spare terminal strips, terminals, wires, and cables are to be noted. Data included in these drawings are to be used in conjunction with cable running list drawings for installation and maintenance.

f. (41) Cross Connect Diagram – XC – Cross connect diagram drawings detail all permanent and semipermanent wiring cross connections between equipment on all distribution frames. Information should include identification and location of all interconnected devices.

g. (42) Trucking Diagram – TD – Trucking diagram drawings detail the access from local subscribers to outgoing trunks, special service numbers, operator positions, and test numbers by subscriber classification and level assignments. Access from incoming trunks to local DCO facilities and numbers is also shown. Additional information includes trunk group number assignments, cable run numbers, and quantities of equipment installed and in use.

h. (43) Trunking Schematic – TS – Trunking schematic drawings detail the telephone switching and trunking configuration in schematic format. It includes office connections according to class of subscribers and selector levels and their access to local numbers, operator, emergency and test numbers, and exclusive trunk groups. Equipment and trunk quantities that identify the type of trunk (e.g., Incoming, outgoing, 2-way and type of signaling (2280 or 600/750)) is also included in this drawing.

i. (44) Telephone Miscellaneous – TM – Telephone miscellaneous drawings show various telephone wiring functions.

2.6.10 Antennas/Towers

a. (45) Antenna/Tower Details – AT – Antenna/Tower details drawings include placement and orientation of antennas, towers, and waveguide or cable runs. Both plan and elevation view are typically required.

b. (46) Restricted Area – RA – Restricted area drawings identify man-made and natural obstacle elevations in the microwave beam path. It provides the elevation for the antennas involved and lists beam widths, dish sizes, and patch distances. This drawing will include an inset map of the site to illustrate the relationship of the area to the surrounding countryside and a site layout showing the location of the tower.

c. (47) Radiation Profile – RP – Radiation profile drawings describe the area extent of electromagnetic influence, radiation, and interference of a communications-electronics installation. It should contain a plan and elevation view of the installation and show antenna signals, beam paths, and radiation areas of equipment, cables, and power supplies to indicate the areas and parameters of radiation and/or interference. The drawing must be scaled to identify heights of structures, antenna azimuths, etc. The drawing should define areas of real potential hazards to personnel and equipment. This is a required drawing, but it may be combined with the site plan drawing.

2.6.11 Miscellaneous

a. (48) Miscellaneous Details – MS – Miscellaneous details drawings are to be used when specific information is required that cannot be categorized in any of the other drawing detail codes listed in this document.

b. (49) Photograph – PH – Photograph drawings are reserved for the inclusion of photographs in the drawing package.

2.6.12 Testing

a. (50) Test Results – TR– Test results drawings contain test results and analysis data for signal cables/paths and circuit testing.

2.6.13 Standard Drawings

a. (51) Standard Drawing – STD – Standard drawings are common drawings that are prepared for projects that have repeated usage and show the preferred configurations of facilities or equipment. They are prepared and registered within USAISEC as standard drawings, identified by the standard drawing number.

2.7 Drawing Development Phases

Drawings have a life cycle consisting of three primary phases: Draft, Planned, and As- Built. Between and during these phases are periods of review referred to as redlining.

2.7.1 Draft Drawings

The Draft phase of a drawing consists of the initial development and review of a drawing.

In the systems engineering process, there are often milestones at 30-percent, 60-percent, and 90-percent completion, correlating to the Preliminary Design Review, Critical Design Review, and Final Design Review, respectively. All drawings are considered draft throughout this process. Drawings may go through internal peer review, inter-agency review, and/or stakeholder review, and modifications will likely be required as drawings are developed. Once drawings have been through the draft and review processes and have been approved for implementation, they move to the Planned phase of a drawing.

2.7.2 Planned Drawings

Also referred to as “Final Draft” or “To-Be” drawings, Planned Drawings comprise the final formal deliverable of the design phase prior to implementation, and are the drawings found in an Engineering Installation Plan (EIP). They must have fully incorporated all owner and stakeholder input and addressed all review comments.

During installation/implementation, it is not uncommon to encounter issues or complications that may require modifications to the Planned Drawings. To incorporate these modifications, Planned Drawings must then also go through the redline processes upon completion of installation/implementation to develop As-Built Drawings.

2.7.3 As-Built Drawings

As-Built Drawings include all changes made throughout the installation/implementation of the design. They show what was actually implemented and serve as a foundational record for future adds/moves/changes to the system and are typically maintained by the local Department of Public Works (DPW). A copy of the as-built drawings should be kept in USAISEC project files for historical reference since system documentation left on-site is often not retained or properly maintained and USAISEC historical files are the only record of the system installation.

2.7.4 Redline

The redline process is used to document changes or revisions to drawings. Any available drawing may be revised, and that revision documented on every sheet affected by the revision. Traditionally, the redline process involved making colored markings on black and white paper drawings to document changes needed to the drawings. Markups in red, yellow, and blue indicated required changes instructions to the drafter, while markups in green indicates notes from the drafter to the designer. See Table 5 for the redline markup color code.

Table 5. Redline Markup Color Description Red Additions or changes to the drawing content

Yellow Deletions from the drawing content Blue Instructions/notes to the drafter (not to be added to drawing)

Green Instructions/notes from drafter to designer

With the growing complexity of UAISEC drawings, the use of colors has increased on many drawings conflicting with traditional redline markup. Further, drawing review is more frequently performed digitally on exported Portable Document Format (PDF) files, which possess extensive review and commenting tools. Therefore, the adherence to using traditional color markup is not strictly required but recommended whenever possible.

2.7.5 Drawing Revisions

All modifications to a distributed/published document must be documented on every affected sheet prior to subsequent distribution/publishing. This is completed by adding a row to the Revision Information (see section 3.10.10) table and filling out each field, incrementing the Revision Letter in the bottom right corner of the title block of the sheet (see section 3.10.9.15), and updating this Revision Letter on the first sheet of a drawing in the Revision Status of Sheets table (see section 3.10.11). For additional guidance, refer to ASME Y14.35-2019 Chapter 6 for updating revision information.

Following initial distribution, deletions of figures/tables/sections/views/details will have a large "X" marked through the item and the word "deleted" will replace the title under the figure/table/section/view/detail number, which will remain.

The addition of figures or tables, regardless of the location on the sheet or existing figures or tables, will continue the existing number sequence. For example, on a sheet with six existing figures, it is acceptable for a new figure F2-7 to be added between figures F2-2 and F2-3.

Following initial distribution, the addition of sections, views, or details will continue their alphabetical sequence. While it is recommended to identify these elements in ascending order throughout the drawing, it is acceptable to deviate from this guidance for sections, views, or details added after initial distribution, but it must be identified in the revision table (see section 3.10.10).

3.0 DRAFTING GUIDANCE

Autodesk AutoCAD is the standard electronic drawing application employed by USAISEC and shall be used for the final production of all CAD drawings. AutoCAD is available on individual U.S. Government (USG) computers for USAISEC engineers and technicians to produce project engineering drawings. Drawings can also be provided to USAISEC draftspersons in any format to include hand sketches, Visio, PowerPoint, and AutoCAD/AutoCAD LT for finalization in an AutoCAD drawing set package. Where possible, it is recommended that drawings are developed in AutoCAD or AutoCAD LT to save time for the draftsperson, as all drawings will be returned from the draftsperson in AutoCAD.

Drawing design is a creative effort with a myriad of choices and this guide is not intended to interfere with the personal style of the designer. It is instead meant to ensure that drawings meet the standards and level of quality associated with USAISEC products.

The following sections provide guidance on drawing development within AutoCAD.

3.1 Model Space and Paper Space

AutoCAD provides two distinct working environments, called “model space” and “paper space”, to work with objects in a drawing. Model space is a limitless drawing area, typically differentiated by a black or very dark color working background, and is accessible from the Model tab. Paper space, accessible from the layout tabs (which is why it is sometimes referred to as layout space), is used to print or plot a view of model space to either a physical sheet of paper or an electronic equivalent (.PDF file). This is accomplished by placing viewports within the paper space, which are objects that display customized views of the model space.

3.2 Model Space Drawing Scale

Determination of the model space drawing scale is the very first step when beginning development of a drawing.