Attachment 5 - 27 SOCES Cannon AFB CAD Standards.pdf

27 Special Operations Civil Engineer Squadron

CANNON AIR FORCE BASE

CAD STANDARDS

Facility and Construction Documentation

Attachment 5 FA4855-10-R-0006 11 June 2010

CANNON AIR FORCE BASE CAD STANDARDS 2010

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Table of Contents

1. Introduction

2. File Format and Setup

Electronic File Format

Policy on Model Space and Paper Space Option 1 – Model Space and Paper Space Combined Option 2 – Model Space Only

Electronic Drawing File Naming Conventions Project Code Model file naming convention Sheet file naming convention

Coordination between Sheet File Name and Sheet Identifier

3. Graphic Concepts

Presentation Graphics Line widths Line types/styles Text styles/fonts

Border Sheets Sheet sizes Title block

Drawing Scales

Tolerances

Dimensioning

4. Level/Layer Assignments

Levels/layers Level/layer naming conventions

Model Files Level/layer assignment tables Status (Phase) levels/layers Policy on External Reference Files

Sheet Files Level/layer assignment tables

5. Standard Symbology

Tabulated Version of the Symbology/Elements

Policy on Blocks

6. Policy on CAD File Translation

Error-free AutoCAD Drawing Deliverables

7. Government-Furnished Materials

Appendix A: CAD Quality Assurance Checklist ........................................................................................ A-1 Appendix B: Model File Level/Layer Assignment Tables ......................................................................... B-1 Appendix C: Sheet File Level/Layer Assignment Tables .......................................................................... C-1 Appendix D: Title Blocks ......................................................................................................................... D-1 Appendix E: Recommended Standard Symbology .................................................................................. E-1 Appendix F: Section 214 of the Homeland Security Act of 2002 ............................................................ F-1

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1. Introduction

The purpose of this document is to serve as a tight specification for producing and delivering CADD drawings for as-built drawings and construction projects. These guidelines are intended to ensure the successful use and control of CAD system and data throughout Cannon Air Force Base.

A signed copy of the CAD Quality Assurance Checklist, found in appendix A, must be submitted with CAD drawings and scans being delivered during the closeout phase of projects. When the CAD Quality Assurance Checklist has been signed and submitted, the vendor (architect, engineer, contractor, etc.) is assuring that all materials adhere to the standards and guidelines set forth in this document.

The layering standard, appendices B and C, outlined in this document is a modified version of the Tri- Service CAD A/E/C CADD Standard Release 3.0, dated September 2006. The Tri-Service CAD A/E/C CADD Standard contains supplemental materials with Department of Defense specific requirements not addressed in the U.S. National CAD Standard. The 27 Special Operations Civil Engineer Squadron (27 SOCES) follows its own guidelines for naming and organizing CAD files.

Use Disclaimer All construction documents must include the following disclaimer (all ready incorporated on the 27 SOCES title block template): “WARNING: This document may contain sensitive information and therefore must be treated as a confidential document. The information contained in this document must be maintained in a confidential manner to prevent compromising homeland security as provided in Section 214 of the Homeland Security Act of 2002. No part of this document shall be reproduced, released or distributed without the express written permission of 27 Special Operations Squadron Civil Engineering Squadron, Cannon AFB. Unauthorized reproduction, release or distribution may result in federal or civil penalty or other action by Cannon AFB.”

If any questions arise in regards to this document, please provide them to the following address.

27 Special Operations Civil Engineer Squadron Programs Flight – Technical Support Element Bldg. 355 506 North DL Ingram Cannon AFB NM 88103 Tel: 575-784-2459 Fax: 575-784-2738

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2. File Format and Setup

Electronic File Format As-built drawings and construction project drawings must be submitted to 27 Special Operations Civil Engineer Squadron (27 SOCES) in full compliance with the version of AutoCAD (file extension = .DWG) that 27 SOCES is currently using. AutoCAD 2009 is the current version being used.

Policy on Model Space and Paper Space 27 SOCES requires that each CAD file submitted as a project deliverable contains only one drawing model with one title block, using either of the following setups.

1. Model Space and Paper Space Combined (recommended). Each CAD file is to be set up to contain only one title block in paper space which references the building model contained in model space.

2. Model Space Only. Both the drawing model and the drawing’s title block are contained in the same model space environment within a single CAD file. Paper space is not used with this option.

Electronic Drawing File Naming Conventions

Project Code A 0- to 20-character Project code is recommended and should be identified at the start of each project to ensure consistent file names within the project.

Examples:

Official agency project number

The project number defined by the agency system manager for their record system

Model file naming convention The model file naming convention (Figure 2-1) consists of one optional field, followed by three mandatory fields. The first field may be omitted, however the remaining fields must be used and in the correct sequence.

The first two-character field represents the Discipline Designator. Table 2-1 lists the only characters that can be used for the first character in the Discipline Designator, the second character is always a hyphen “-“. The next two-character field represents the Model File Type (Table 2-2). The final four-character code is User Definable.

*A-FPXXXX.dwg User Definable

0-20 Character Project Code

Discipline Designator

Model File Type

Figure 2-1 Model file naming convention

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Table 2-1 Discipline Designators Discipline Designator General G

Hazardous Materials H

Survey/Mapping V

Geotechnical B

Civil C

Landscape L

Structural S

Architectural A

Interiors I

Equipment Q

Fire Protection F

Plumbing P

Process D

Mechanical M

Electrical E

Telecommunications T

Resource R

Other Disciplines X

Contractor/Shop Drawings Z

Operations O

Table 2-2 Model File Types Discipline Code Definition General BS Border Sheet

CS Cover Sheet

KP Key Plan

Hazardous Materials DT Detail

EL* Elevation

LG Legend

PP Pollution Prevention Plan

QP* Equipment Plan

SC Section

XD* Existing Demolition Plan

Survey/Mapping AL Existing Airfield Lighting Plan

CP Existing Communication System Plan

EU Existing Electrical Utilities Plan

HP Existing Hydrographic Survey and Mapping Plan

HT Existing HTCW Utilities Plan

LG Legend

PB Property Boundary

PR Existing Profile

SC Existing Section

SP Survey and Mapping Plan

UP Existing Utilities Plan

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Geotechnical DT Detail

JP Joint Layout Plan

LB Boring Log

LG Legend

PV Pavement Site Plan

SC Section

SH* Schedule

SI Subsurface Investigation Plan

Civil AF Airfield Plan

DT Detail

EL Elevation

ER Eco-Restoration Plan

FC Flood Control Plan

GP Grading Plan

IP* Installation Plan/Base Map

JP Joint Layout Plan

KP* Staking Plan

LG Legend

NG Navigation/Dredging Plan

PL* Project Location Map

PR Profile

SC Section

SH* Schedule

SP Site Plan

TS Transportation Site Plan

UP Utilities Plan

XD* Existing/Demolition Plan

Landscape DT Detail

EL* Elevation

IP Irrigation Plan

LG Legend

LP Landscape Plan

SC* Section

SH* Schedule

XD* Existing/Demolition Plan

Structural 3D Isometric/3D

BP Bridge Plan

CP Column Plan

CW Misc. Small Civil Works Structures

DT Detail

EL Elevation

EP Enlarged Plan

FC Flood Control Structures

FP Framing Plan

LG Legend

NP Foundation Plan

SC Section

SH Schedule

XD* Existing/Demolition Plan

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Architectural 3D* Isometric/3D

AC Area Calculations/Occupancy Plan

CP Reflected Ceiling Plan

DT Detail

EL Elevation

EP* Enlarged Plan

FP Floor Plan

LG Legend

QP Equipment Plan

RP Roof Plan

SC Schedule

XD* Existing/Demolition Plan

Interiors 3D* Isometric/3D

DT Detail

EL Elevation

EP* Enlarged Plan

FL Floor Patterns

LG Legend

QP* Equipment Plan

RP Furniture Plan

SC* Section

SH* Schedule

SP Signage Placement Plan

WP System Furniture Plan

XD* Existing/Demolition Plan

Fire Protection 3D* Isometric/3D

DG* Diagram

DT Detail

FA Fire Alarm/Detection Plan

FP Fire Suppression Plan

LG Legend

LP Life Safety Plan

SH* Schedule

XD* Existing/Demolition Plan

Plumbing 3D* Isometric/3D

DG Diagram

DT Detail

EL* Elevation

EP* Enlarged Plan

LG Legend

PP Piping Plan

SH* Schedule

XD* Existing/Demolition Plan

Mechanical 3D* Isometric/3D

DG Diagram

DT Detail

EL Elevation

EP* Enlarged Plan

HP HVAC Plan

HS Hydraulic Systems

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Mechanical HT HTCW Utilities Plan

LG Legend

MD Machine Design Plan

MH Material Handling Plan

QP* Equipment Plan

SC Section

SH* Schedule

SP Specialty Piping and Equipment Plan

XD* Existing/Demolition Plan

Electrical AL Airfield Lighting Plan

AP* Auxiliary Power Plan

CP Exterior Communication Systems Plan

DG Diagram

DT Detail

EU Electrical Utilities Plan

GP Grounding System Plan

LG Legend

LP Lighting Plan

PP Power Plan

SH* Schedule

SS Special Systems Plan

XD* Existing/Demolition Plan

Telecommunications DG Diagram

DT Detail

LG Legend

SH* Schedule

TP Telephone/Data Plan

XD* Existing/Demolition Plan

* = No Model File Table available in Appendix B

Sheet file naming convention The sheet file naming convention (Figure 2-2) has one optional field for the Project Code, followed by four mandatory fields. All mandatory fields must be used in the correct sequence.

The first field is optional and can be used for a 0- to 20-character Project Code. The next two characters are the Disciple Designator with Level 2 Designator (Table 2-3). The next character is the Sheet Type Designator (Table 2-4) followed by a two-character Sheet Sequence Number (01-99). The remaining three characters are user definable.

* A D 1 0 2 XXX.dwg User Definable

0-20 Character Project Code

Discipline Designator w/ Level 2 Designator

Sheet Type Designator

Sheet Sequence Number

Figure 2-2 Sheet file naming convention

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Table 2-3 Discipline Designators with Level 2 Designators Discipline Designator Description Content General G- All General All or any portion of subjects in the following

Level 2 Designators

GI General Information Drawing index, code summary, symbol legend, orientation maps

GC General Contractual Phasing, schedules, contractor staging areas, fencing, haul routes, erosion control, temporary and special requirements

GR General Resource Photographs, soil borings

Hazardous Materials H- All Hazardous Materials All or portion of subjects in the following Level 2 Designators

HA Asbestos Asbestos abatement, identification, or containment

HC Chemicals Toxic chemicals handling, removal or storage

HL Lead Lead piping or paint removal

HP PCB PCB containment and removal

HR Refrigerants Ozone depleting refrigerants

Survey/Mapping V- All Survey/Mapping All or portion of subjects in the following Level 2 Designators

VA Aerial Survey

VF Field Survey

VH Hydrographic Survey

VI Digital Survey

VU Combined Utilities

Geotechnical B- All Geotechnical All or portion of subjects in the following Level 2 Designators

Civil C- All Civil All or portion of subjects in the following Level 2 Designators

CD Civil Demolition Structure removal and site clearing

CE Civil Ecosystem Restoration

Environmental restoration

CF Civil Flood Control Levees, spillways, pump stations

CG Civil Grading Excavation, grading, drainage, erosion control, retention ponds

CI Civil Improvements Pavers, flagstone, exterior tile, furnishings, retaining walls, and water features

CN Civil Navigation Navigation, harbors, dredging

CO Civil Operation and Maintenance

Repair and upgrade O&M structures

CP Civil Paving Roads, driveways, parking lots

CH Civil Shore Protection Erosion protection structures on shoreline

CR Civil Recreation Recreation facilities

CS Civil Site Plats, topographic, dimension control

CX Civil Security Security-related work

CT Civil Transportation Waterways, wharves, docks, trams, railways, airfields, and people movers

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Civil CU Civil Utilities Water, sanitary sewer, storm sewer, power, communications, natural gas, and steam systems

Landscape L- All Landscape All or portion of subjects in the following Level 2 Designators

LD Landscape Demolition Protection and removal of existing landscape

LI Landscape Irrigation

LP Landscape Planting

Structural S- All Structural All or portion of subjects in the following Level 2 Designators

SD Structural Demolition Protection and removal

SS Structural Site

SB Structural Substructure Foundations, piers, slabs, and retaining walls

SF Structural Framing Floors and roof

Architectural A- All Architectural All or portion of subjects in the following Level 2 Designators

AS Architectural Site

AD Architectural Demolition

Protection and removal

AE Architectural Elements General architectural

AI Architectural Interiors

AF Architectural Finishes

AG Architectural Graphics

Interiors I- All Interiors All or portion of subjects in the following Level 2 Designators

ID Interior Demolition

IN Interior Design

IF Interior Furnishings

IG Interior Graphics Murals and visuals

Equipment Q- All Equipment All or portion of subjects in the following Level 2 Designators

QA Athletic Equipment Gymnasium, exercise, aquatic, and recreational

QB Bank Equipment Vaults, teller units, ATMs, drive-through

QC Dry Cleaning Equipment

Washers, dryers, ironing, and dry cleaning

QD Detention Equipment Prisons and jails

QE Educational Equipment Chalkboards, library

QF Food Service Equipment

Kitchen, bar, service, storage, and processing

QH Hospital Equipment Medical, exam, and treatment

QL Laboratory Equipment Science labs, planetariums, observatories

QM Maintenance Equipment

Housekeeping, window washing, and vehicle servicing

QP Parking Lot Equipment Gates, ticket, and card access

QR Retail Equipment Display, vending, and cash register

QS Site Equipment Bicycle racks, benches, playgrounds

QT Theatrical Equipment Stage, move, rigging systems

QV Video/Photographic Equipment

Television, darkroom, and studio

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Fire Protection F- All Fire Protection All or portion of subjects in the following Level 2 Designators

FA Fire Detection and Alarm

FX Fire Suppression Fire extinguishing systems and equipment

Plumbing P- All Plumbing All or portion of subjects in the following Level 2 Designators

PS Plumbing Site Extensions and connections to Civil Utilities

Plumbing PD Plumbing Demolition Protection, termination, and removal

PP Plumbing Piping Piping, valves, and insulation

PQ Plumbing Equipment Pumps and tanks

PL Plumbing Domestic water, sanitary and storm drainage, fixtures

Process D- All Process All or portion of subjects in the following Level 2 Designators

DS Process Site Extension and connection to civil utilities

DD Process Demolition Protection, termination, and removal

DL Process Liquids Liquid process systems

DG Process Gases Gaseous process systems

DP Process Piping Piping, valves, insulation, tanks, pumps, etc.

DQ Process Equipment Systems and equipment for thermal, electrical, materials handling, assembly and manufacturing, nuclear, power generation, chemical, refrigeration, and industrial processes

DE Process Electrical Electrical exclusively associated with a process and not the facility

DI Process Instrumentation

Instrumentation, measurement, recorders, devices and controllers (electrical and mechanical)

Mechanical M- All Mechanical All or portion of subjects in the following Level 2 Designators

MS Mechanical Site Utility tunnels and piping between facilities

MD Mechanical Demolition Protection, termination, and removal

MH Mechanical HVAC Ductwork, air devices, and equipment

MP Mechanical Piping Chilled and heating water, steam

MI Mechanical Instrumentation

Instrumentation and controls

MY Mechanical Hydraulic Systems

Pump stations, spillways, slide gates

Electrical E- All Electrical All or portion of subjects in the following Level 2 Designators

EA Electrical Airfield Lighting and NAVAIDS

Visual air navigation systems

ES Electrical Site Exterior electrical systems (power, lighting, auxiliary)

EC Electrical Cathodic Protection

Cathodic protection systems

EG Electrical Grounding Grounding, lightning protection devices

ED Electrical Demolition Protection, termination, and removal

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Electrical EP Electrical Interior Power

Interior power

EL Electrical Interior Lighting

Interior lighting

EI Electrical Instrumentation

Controls, relays, instrumentation, and measurement devices

EY Electrical Interior Auxiliary Systems

Alarms, nurse call, security, CCTV, PA, music, clock, and program

Telecommunications T- All Telecommunications All or portion of subjects in the following Level 2 Designators

TD Telecommunications Demolition

Protection, termination, and removal

TA Audio Visual Cable, music, and CCTV systems

TC Clock and Program Time generators and bell program systems

TI Intercom Intercom and public address systems

TM Monitoring Monitoring and alarm systems

TN Data Networks Network cabling and equipment

TS SCADA Supervisory Control and Data Acquisition (SCADA) systems and equipment

TT Telephone Telephone systems, wiring, and equipment

TY Security Access control and alarm systems

Resource R- All Resource All or portion of subjects in the following Level 2 Designators

RC Resource Civil Surveyor’s information and existing civil drawings

RS Resource Structural Existing facility structural drawings

RA Resource Architectural Existing facility architectural drawings

RM Resource Mechanical Existing facility mechanical drawings

RE Resource Electrical Existing facility electrical drawings

Other Disciplines X

Contractor/Shop Drawings

Z

Operations O

Table 2-4 Sheet Type Designators Sheet Type Designator General (symbols legend, notes, etc.) 0

Plans (horizontal views) 1

Elevations (vertical views) 2

Sections (sectional views) 3

Large-Scale Views (plans, elevations, or sections that are not details) 4

Details 5

Schedules and Diagrams 6

User Defined 7

User Defined 8

3D Representations (isometrics, perspectives, photographs) 9

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Coordination between Sheet File Name and Sheet Identifier When assigning a sheet identifier (sheet reference block) the user should coordinate with the name assigned to the electronic sheet file. The identifier must consist of the discipline designator, sheet type designator, and the sheet sequence number.

The National CAD Standards mandates that the disciplines follow the order as shown in Table 2-1.

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3. Graphic Operations

Presentation Graphics

Line widths For the majority of drawings the eight line widths defined in Table 3-1 are considered sufficient and should not be expanded unless an appreciable improvement in drawing clarity or contrast can be realized. Table 3-1 shows information about the various line widths.

Table 3-1 Comparison of Line Widths Line Thickness mm in. Typical Use Fine 0.18 0.007 Patterning

Thin 0.25 0.010 Dimension lines, dimension leader/witness lines, note leader lines, long break lines, schedule grid lines, and objects seen at a distance

Medium 0.35 0.014 Minor object lines

Wide 0.50 0.020 Major object lines, cut lines, section cutting plane lines, and titles

Extra Wide 0.70 0.028 Minor title underlining, match lines, schedule outlines, large titles, and object lines requiring special emphasis

XX Wide 1.00 0.040 Major title underlining and separating portions of drawings

XXX Wide 1.40 0.055 Border sheet outlines and cover sheet line work

XXXX Wide 2.00 0.079 Border sheet outlines and cover sheet line work

Line types/styles The main line types/styles set by 27 SOCES are AutoCAD defaults, and listed in Table 3-2. Appendix B incorporates discipline specific line types/styles as well as the AutoCAD defaults.

Table 3-2 Standard Line Types/Styles ID Description AutoCAD Designator Example 0 Continuous Continuous

1 Dotted Dot

2 Dashed Hidden

3 Dashed spaced Dashed

4 Dashed dotted Dashdot

6 Dashed double-dotted Divide2

7 Chain Center

Fonts & Text Styles

For As-Built Drawings Only font ROMANS.shx is approved for use. Any text style using this font will be allowed. Dimensions, labels and notes should not appear larger than 1/4” or smaller than 1/8” height on printed drawings, and titles should not appear larger than 1/2” height on printed drawings.

For Construction Projects Text styles and fonts may be used; however the font ROMANS.shx for most applications is requested.

Any font that is not packaged with AutoCAD is not allowed. Dimensions, labels and notes, should not be less than 1/8” height on printed paper.

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Border Sheets

Sheet Sizes Typical projects will be prepared on American National Standards Institute (ANSI) D sheets (ANSI E may be used for large maps (i.e., installation master plans and drawings for civil works projects)). Other industry standard sizes may be used depending on specific requirements. Table 3-3 lists standard sizes of all sheets.

Table 3-3 ANSI, and Architectural Sheet Size Comparison

ANSI Equivalent Architectural Equivalent

Letter in. Letter in.

F 28.0 x 40.0 F 30.0 x 42.0

E 34.0 x 44.0 E 36.0 x 48.0

D 22.0 x 34 D 24.0 x 36.0

C 17.0 x 22.0 C 18.0 x 24.0

B 11.0 x 17.0 B 12.0 x 18.0

A 8.5 x 11.0 A 9.0 x 12.0

Title Blocks Each CAD file submitted to 27 SOCES should have only one title block. When paper space is used the title block will be placed with its lower left hand corner point inserted at a coordinate location of (0,0,0).

The drawing’s title block should contain certain information that 27 SOCES/CEPT needs to store and retrieve each drawing in its vault.

Consulting architects and engineers must use the 27 SOCES title block template or a modified version provided by 27 SOCES.

At a minimum title blocks should contain all of the following information listed below.

Project Information:

Firm Name – representing the drawing author

Project Name – as specified by Cannon AFB

Building Number – as specified by Cannon AFB

Building Name – specify only if the project name does not include this information already, and the project is building specific

Project Number – assigned by the Vendor Drawing Information:

Drawing Title – indicating the drawing content, e.g. floor plan, section, detail, etc.

Drawing Number

Date of Drawing – original drawing date including significant revision dates

Drawing Scale – representing the intended plot scale of the drawing with the title block North Arrow

Drawing Scales All CADD drawing models should be drafted at full scale in architectural, engineering, or decimal units, such that one drawing unit equals one inch.

The following tables list typical scales for drawings, text sizes and line type scales. Scales should be limited to those commonly found on hand-held architectural, mechanical, and engineering scales.

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Table 3-4 Typical Drawing Scales Drawing Type Inch-Pound Metric Site Plans 1” = 20’ 1:200

1” = 30’ 1:400

1” = 40’ 1:500

1” = 50’ 1:600

1” = 60’ 1:700

1” = 100’ 1:1000

1” = 200’ 1:2000

1” = 400’ 1:5000

1” = 500’ 1:6000

1” = 1000’ 1:10000

1” = 2000’ 1:20000

Floor Plan 1/4” = 1’-0” 1:50

1/8” = 1’-0” 1:100

1/16” = 1’-0” 1:200

Roof Plan 1/16” = 1’-0” 1:200

Exterior Elevations 1/8” = 1’-0” 1:100

1/16” = 1’-0” 1:200

Interior Elevations 1/4” = 1’-0” 1:50

1/8” = 1’-0” 1:100

Cross sections 1/4” = 1’-0” 1:50

1/8” = 1’-0” 1:100

1/16” = 1’-0” 1:200

Wall sections 1/2” or 3/4” = 1’-0” 1:20

Stair Details 1” or 1-1/2” = 1’-0” 1:10

Details 3” = 1’-0” 1:5

1” or 1-1/2” = 1’-0” 1:10

Table 3-5 Inch-Pound Text Sizes and Line Type Scales Scale Text Size Line Type Scale 12” = 1’-0” or Full Size 0.125” 1

6” = 1’-0” 0.25” 2

3” = 1’-0” 0.50” 4

1-1/2” = 1’-0” 1” 8

1” = 1’-0” 1.50” 12

3/4” = 1’-0” 2” 16

1/2” = 1’-0” 3” 24

3/8” = 1’-0” 4” 32

1/4” = 1’-0” 6” 48

3/16” = 1’-0” 8” 64

1/8” = 1’-0” 12” 96

3/32” = 1’-0” 16” 128

1/16” = 1’-0” 24” 192

1/32” = 1’-0” 48” 384

1” = 5’ 7.5” 60

1” = 10’ 1.25’ 120

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1” = 20’ 2.5’ 240

1” = 30’ 3.75’ 360

1” = 40’ 5’ 480

1” = 50’ 6.25’ 600

1” = 60’ 7.5’ 720

1” = 100’ 12.5’ 1200

1” = 200’ 25’ 2400

1” = 400’ 50’ 4800

1” = 500’ 62.5’ 6000

1’ = 1000’ 125’ 12000

1” = 2000’ 250 24000

Tolerances

For As-Built Drawings Typically exterior building dimensions within CADD drawings must reconcile to within 1 inch of the building dimensions measured in the field, and interior dimensions must be within 1/2 inch of field dimensions.

For Construction Drawings Tolerances for construction drawings are contained within professional service

Dimensioning Dimension text height should match the size of the text in the rest of the drawing. The dimension text should be at the midpoint and top of the dimension line. Dimension lines will be offset a minimum of 9/16” and extension lines will be offset a minimum of 1/16” from the element being dimensioned.

Dimension terminators will be slashes, or architectural ticks.

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4. LEVEL/LAYER ASSIGNMENTS

Levels/Layers

Level/layer naming convention The level/layer is the basic tool used in CADD for managing graphic information (Figure 4-1).

A-WALL-FULL-INTR-D

Optional Status Code

Discipline Designator

Major Group

Minor Group

2nd Minor Group

Figure4-1 Level/layer naming format

A basic level/layer name consists of a two-character Discipline Designator (e.g., “A-“ for Architectural, “M-“ for Mechanical), listed in Table 2-1, a four-character Major Group (e.g., “DOOR” for Doors, “LITE” for Lighting Fixtures), and a four-character Minor Group (e.g. A-WALL-CNTR for wall centerlines, M- HVAC-CDFF for HVAC ceiling diffusers).

All layers will be reconciled within each drawing. This will identify any potential errors or problems prior to plotting.

Model Files

Level/layer assignment tables The level/layer assignment tables in Appendix B present the following:

The levels/layers assigned to each model file

A description for each level/layer

The recommended presentation graphics associated with each level/layer. Including line style, line width, and color. (Note: These recommendations may be modified to enhance the clarity of the drawing. However, the recommendations should be adhered to as much as possible to maintain consistency).

The various model files that levels/layers can be created in.

Status (Phase) levels/layers Levels/layers may be modified to show the status of a particular item in the drawing. A level/layer may have a Status Field appended to them as shown in figure 4-1. Table 4-1 shows Status (Phase) codes.

The use of Status (Phase) codes should be limited due to the possibility of a significant increase in the number of levels/layers in a model file.

Table 4-1 Status (Phase) Codes Code Description N New work

E Existing to remain

D Existing to demolish

F Future work

T Temporary work

M Items to be moved

X Not in contract

1-9 Phase numbers

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Reference files (XREFs) 27 SOCES/CEPT will not accept the submission of any CAD drawing deliverable which contains references to external source drawing files. All externally referenced data sources that were used during the drawing production phase should be inserted and retained as a block within a single drawing file, including the title block, upon project completion and prior to drawing delivery. The resulting self-contained drawing file is an acceptable deliverable to 27 SOCES.

Sheet Files

Level/layer assignment tables The level/layer assignment tables in Appendix C present the following:

The levels/layers assigned to each sheet file.

A definition for each level/layer

The recommended presentation graphics associated with each level/layer, including line style, line width, and color.

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5. SYMBOLOGY

Policy on Blocks At this time 27 SOCES is not requiring the use of any particular block definitions or block libraries. When developing blocks it is required that the following general rules will be followed.

1. All entities within a block must be created on layer 0.

2. Drawing entities translated into AutoCAD from non-AutoCAD systems must revert to layer 0 when exploded within AutoCAD.

Tabulated Version of the Symbology/Elements A symbology library may be provided if requested. The library contains four types of elements: Lines, Patterns, Symbols, and Objects. Lines are graphical representations of linear drawing features (e.g.

utility lines, fence lines, contours, etc.). Patterns are defined as repeated drawing elements (e.g. lines, dots, circles, etc.) within a defined area. Symbols are AutoCAD blocks that represents objects (electrical outlets, light fixtures, etc.). Objects are AutoCAD blocks that retain their actual size no matter the drawing scale (e.g. doors, furniture, etc.).

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6. Policy on CAD File Translation

Error-free AutoCAD Drawing Deliverables 27 SOCES realizes that many service providers do not use the same CAD system as Cannon AFB.

However, 27 SOCES expects that providers who work with non-AutoCAD file formats will submit DWG formatted CAD files upon project closeout that are fully compliant with all the standards in this document, which have no significant loss of drawing entities or project data that can result from standard CAD file translation.

All DWG files and CAD drawing entities submitted at the completion of a project must be able to be manipulated using standard AutoCAD drafting procedures. Non-compliance with this policy may result in the rejection of submitted files at the time of closeout. DXF files will not be accepted at project closeout as a substitution for DWG CAD files.

Translation Testing Recommended For firms translating their native CAD file format into DWG format concerned about delivering error-free CAD files to Harvard upon project closeout, it is strongly recommended that thorough file translation testing be conducted before the drawing development phase of the project. This will assure early detection of file conversion issues, if any, and allow for corrective measures to be taken before the project closeout period.

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7. Government-Furnished Materials Electronic seed/prototype files containing the Cannon AFB preset standard settings to include:

– Working units

– Line style/type library

– Level/layer structures

Electronic copy of Cannon AFB AutoCAD Standards, to include:

– Appendix A: CAD Quality Assurance Checklist

– Appendix B: Model File Level/Layer Assignment Tables

– Appendix C: Sheet File Level/Layer Assignment Tables

– Appendix D: Title Blocks

– Appendix F: Homeland Security