Attachment F - As-built Guidance.pdf

As-built Guidance for Contractors Effective 11/19/2014 printed hardcopy shop drawings in addition to electronic CAD drawings. If Contract Specification allow for the acceptance of shop drawing which are smaller than the CAD Standard sheet size (i.e. 8.5"x11" or 11"x17" etc.) the sheets will be referenced into the standard size border sheet used in the Government Furnished CAD Drawings. The Contract Specification may also allow PDF Shop Drawings not prepared by the contractor to be referenced into the standard size border sheet. Please refer to Contract Specification for complete requirements and Shop Drawing acceptance.

Typically, shop drawings will be drawn at the same scale as similar drawings in the Government Furnished CAD Drawing set (e.g., fire alarm systems shall be drawn to the same scale as the plumbing or electrical drawings). Sheet Identification Number, Detail and View Identification Numbers, etc. will link details and views to existing drawings. The Index of Drawings will also need to be revised to show the additional sheet(s) with the appropriate Sheet Title and Identification Number.

REVISION OF WORKING HARDCOPY DRAWINGS

General Working Hardcopy Drawing Revision Guidelines

The number of Working Hardcopy Drawing sets that must be maintained and the frequency at which they must be revised is provided in the Contract Specifications. Typically, revision of the Working Hardcopy Drawing set will be performed on a weekly basis. At a minimum, at least one Working Hardcopy Drawing set will be on-site at all times.

Markups will be completed on black line (Grayscale) prints of the most current drawing. If a Contract Modification requires revised drawings during construction, an up-to-date print should be included in the Working Hardcopy Drawing set. The Sheet Index will be revised to reflect the addition, deletion or renaming of any sheets in the set.

Revisions to the Working Hardcopy Drawings will include legible written explanations to assist in the conveyance of the graphical intent and to clarify any ambiguities. The Contractor will ensure all handwritten text is clear and concise. When revisions are made to drawing sheets, the contractor will ensure that all associated views (e.g., sections, details, plans, profiles, elevations, etc.) are revised accordingly, including those on other drawing sheets. In addition, it may be necessary to revise legends, schedules, notes and call-out designations. When revisions require deletions, ensure that all features and associated data and captions that relate to the revision are marked accordingly.

It may be necessary to make revisions on small scale drawings where space may be restricted. In this event, it may be necessary to develop large scale sketches with leaders to the location where applicable.

When attached prints or sketches are included with markup, indicate whether the existing Working CAD Drawing requires revision, an additional Working CAD Drawing should be added to the set or the print or sketch has been provided for further details and is for reference only. When prints or sketches are required, please ensure that adequate detail is provided to allow for revision of the existing Working CAD Drawing or the development of an additional Working CAD Drawing.

The following guidelines should be followed when revising Working Hardcopy Drawings.

Three base colors should be used to markup the drawings to show as-built conditions. If additional colors are used, provide a legend to explain their use.

• Red – Deletions: Deleted graphics shall be marked with red, and shall include red text in notes and red leaders.

• Green – Additions: Added items shall be green with green text in notes and green leaders.

• Blue – Special: Items requiring special information shall be blue with blue text in notes and blue leaders.

To identify revisions, markups will include a delta triangle (equilateral triangle approximately 3/8” per side) near the revised section of the drawing for all changes. When several items in a table or drawing view (e.g., sections, details, plans, profiles, elevations, etc.) are changed or completely redrawn, a single delta triangle may be placed near the title for the table or drawing view. This same method may be used for general revisions to entire drawing sheets when a major portion of the drawing is changed.

When only a few items are revised, added or deleted, a delta triangle will be placed near each item requiring revision. Each delta triangle will contain an identification number that corresponds to an entry in the issue block that describes the revision.

Figure 1 - Use of Delta Triangles

Revision of Working Hardcopy Drawings will require entries into the Issue Block of the drawing Title Block. If a drawing requires revision, the first available space of the Issue Block will be marked “REVISED AS-BUILT” to identify that the drawing has been revised. Immediately below the Issue Block line containing “REVISED AS-BUILT”, a description of each revision on the drawing will be provided and numbered in sequential order. In the event the drawing already includes numbered revisions, the next sequential number will be used.

Figure 2 - Working Hardcopy Revision Block

Working Hardcopy Drawing Additions

When revisions require additions to the Working Hardcopy Drawings, the additions should be indicated with green graphics and text. The revision will be identified with a numbered delta triangle and include graphics, dimensions and notes describing the addition. Revisions will be documented in the Issue Block with a green numbered delta triangle and description of the addition.

Figure 3 - Working Hardcopy Drawing Addition

Working Hardcopy Drawing Deletions

To indicate that a feature was not constructed, installed or implemented, red markups will be used to identify the associated graphics and text as deleted on the Working Hardcopy Drawings. Graphics and text associated with deleted features will be crossed out (X) or marked through. To show a drawing view (e.g., sections, details, plans, profiles, elevations, etc.) or design option is not being used, draw a red box around the drawing view or design option, place an “X” across the box and write “NOT USED” within the box. In addition, a numbered delta triangle will be provided inside the box along with notes as needed to describe the deletion. Deletions will be documented in the Issue Block with a red numbered delta triangle and description of the deletion if necessary.

Figure 4 - Working Hardcopy Deletion

Relocated Features on Working Hardcopy Drawings

Relocated features will be identified on the Working Hardcopy Drawings. There are two acceptable methods to identify a relocated feature. The first method to identify a relocated feature will consist of a deletion of graphics and/or text from a drawing, followed by an addition of the same graphics and/or text in the revised location on the drawing. If this method is used, the Issue Block will be revised to reflect a deletion and an addition of the feature. See the previous section for specific guidance of additions and deletions.

The second method to identify a relocated feature is to draw a blue box around the entire feature and provide a note including specific details to describe the new location of the feature. Within the box, the text “RELOCATED” will be written and a numbered delta triangle will be provided in blue. If this method is utilized to identify relocated features, the relocation will be documented in the Issue Block with a blue numbered delta triangle.

If necessary, all connections for the relocated feature (e.g., wiring, piping, duct work, utilities) will be revised on the drawing(s) to accommodate the relocation.

REVISION OF WORKING CAD DRAWINGS

CAD Standards

USACE requires that standard professional engineering drafting practices be utilized in modifying the electronic CAD drawings to show as-built conditions. All revisions to the Government Furnished CAD Files, including any additional sheets added, shall conform to all CAD Standard requirements outlined in the contract specifications. Typically, contract specifications will require adherence to several standards including, but not limited to, the U.S. National CAD Standard, the CAD/BIM Technology Center’s A/E/C CAD Standard and/or CAD Drafting Standard, and possibly local CAD Standard Supplements or Project Specific Requirements. Please review the contract specifications thoroughly for complete understanding of required CAD Standards.

The CAD Standards listed in the contract specification will include details on Drawing File Organization, Graphic Concepts, Level/Layer Assignments, and Standard Symbology. Drawing File Organization will include the relationship between model files and sheet files, drawing sheet assembly and file naming conventions. Graphic Concepts will include details on the use of standard line work, text, dimensions, Scales and Border Sheets. CAD Standards will provide specific level/layer names and assignments for both sheet and model files. Finally, the CAD standards will prescribe and provide the use of Standard symbology. The following sections provide a summary of content provided in the CAD Standards.

Drawing File Organization

Design Area In development of the Final CAD Drawings, the Design Area setup used for the Government Furnished CADD Drawings will be maintained. This setup of the Design Area is described in the CAD Standards and includes file accuracy (units), global origin and unit definitions.

Model Files and Sheet Files Model Files contain the physical components of a project (e.g., columns, walls, topography, channels, etc.). Model files are drawn at full scale in true geographic space and typically represent plans, elevations, sections, etc. Typically, the development of Final CAD Drawings requires the update of multiple model files. A sheet file is synonymous with a plotted CAD drawing file. A sheet file is a selected view or portion of referenced model files within a border sheet. The addition of sheet-specific information (e.g., text, dimensions, and symbols) completes the development of the document. In other words, a sheet file is the “ready-to-plot” Final CAD Drawing.