DIRECTOR'S ORDER #10A: DESIGN AND CONSTRUCTION DRAWINGS
Approved: Donald W. Murphy
Effective Date: April 15, 2003
Sunset Date: April 15, 2007
NPS Guideline #10, "Preparation of Design and Construction Drawings,"
(Release No. 3, August, 1995) is superseded and replaced by this Director's
Order and Reference Manual 10A.
I. Purpose and Scope
A. General Requirements
B. Drawing Format
C. Drafting Practices
D. Archival Quality
E. Drafting and Detailing
I. Purpose and Scope
The purpose of this Director's Order is to set forth policy and required
procedures governing the preparation of preliminary design (final submittal),
construction, and as-constructed drawings (referred to hereafter as "drawings"),
in order to:
· assure permanent and durable drawings which can be readily reproduced
as legible (1) half-sized prints for bid sets, etc., and (2) microfilm;
· maintain uniformity of work; and
· facilitate review of both architectural and engineering (A/E)
submittals and National Park Service (NPS) generated products.
The policies and procedures contained in this Director's Order and Reference
Manual 10A will apply to all NPS drawings (1) whether prepared by NPS
personnel, other agencies, or A/E contractors, and (2) no matter the method
of drafting, e.g., computer aided design and drafting (CADD), manual drafting,
Authority to issue this Director's Order is contained in the NPS Organic
Act (16 USC 1 through 4), and delegations of authority contained in Part
245 of the Department of the Interior Manual.
A. General Requirements
1. Acceptable Drawings. All drawings will comply with the requirements
of this Director's Order and Reference Manual 10A. Non-conforming drawings
are unacceptable and will be disregarded. The NPS contracting officer
will return non-conforming drawings for necessary redrafting.
2. Waivers. If conditions make it impractical or impossible to
adhere to the requirements of this Director's Order, a waiver may be requested
from (1) the Denver Service Center (DSC) Project Manager, or (2) in the
case of park- or support office-produced projects, the official responsible
for the project.
3. Additional Guidance. This Director's Order sets forth basic
requirements. For more specific information, and graphic examples of drawing
requirements, see Reference Manual 10A, a level 3 document prepared by
the Associate Director, Professional Services. Reference Manual 10A can
be obtained from the DSC Technical Information Center. A CADD Users Guide
is available from DSC to assist in the preparation of acceptable computer-generated
B. Drawing Format
1. Sheet Size. The NPS standard drawing sheet size is 22"
x 34". Border sheets (electronic format) may be obtained from DSC
upon request of the project manager. Use of any sheet size other than
standard requires prior written approval of the official responsible for
2. Drawing Numbers. DSC's Technical Information Center (TIC), the
central repository for all drawings, assigns blocks of drawing numbers
to parks, support offices, etc., in accordance with Director's Order #10B:
Drawing and Map Numbers. In turn, the office/official responsible for
a project will assign a drawing number from the block in accordance with
Director's Order #10B.
3. Cover Sheets. Standard cover sheets must be used for all project
drawings. Pre-developed cover sheets may be available from the project
manager. All cover sheets should contain:
· a vicinity map;
· a park map showing project site location;
· basic data (source of information and date of cover sheet base
· a bar scale including a metric scale;
· required approval and revision blocks;
· a solicitation number assigned by the contracting office (on
drawings prepared for bid);
· a construction contract number (on as-constructed drawings);
· information regarding the A/E firm, subcontractors, and an A/E
contract number (if applicable).
A/E logos are not permitted. Formatting for A/E firm and subcontractor
information is specified in Reference Manual 10A. When a set of drawings
is prepared in part by DSC and in part by an A/E firm, place only the
A/E information block on the drawing sheets prepared by the firm. If a
project is located in a state that requires a professional stamp(s), submit
one A/E stamped set of non-reproducible record drawings (each sheet stamped)
to DSC. Place the stamp to the left of the A/E information block.
An index to the sheets in a drawing set should be located on the cover
sheet if possible; if not possible, place the index on a separate sheet.
4. Second Sheets. Second sheets should be used for all drawings
subsequent to the cover, with the exception of (1) plan and profile sheets,
and (2) survey sheets. Specifications for all drawing sheets are contained
in Reference Manual 10A.
5. Survey Sheets. Survey sheets are to be used for all NPS Survey
6. Title Blocks. Title block requirements for cover sheets and
all subsequent sheets are detailed in Reference Manual 10A.
7. Approval Blocks. Approval blocks for all preliminary design
and construction drawings are described in Reference Manual 10A. Such
drawings require approval signatures when prepared by parks, support offices,
8. Revision Blocks. A revision block is required for changes to
construction drawings which have been issued for bid (and therefore are
official contract drawings). Requirements for revision blocks include:
· an identifying mark (a triangle with a number or letter, used
to key the information in the revision block to the part of the drawing
it pertains to);
· the sheet number(s) of the affected sheet(s);
· a brief description of the revision;
· the date of revision; and
· the initials of the person responsible for the revision.
Information in the revision block should be keyed to a drawing by encircling
the affected part of the drawing and placing a revision mark on or within
the circle. When major revisions are made to a sheet, place the note "General
Revision" above the title block.
9. Construction Contract Modifications. This Director's Order also
governs drawings prepared to accompany a construction contract modification.
The contracting officer is responsible for submitting such drawings or
sketches - in most cases, prepared by the project designer - for inclusion
in the contract modification package. In the event changes are made to
the design drawings during the modification negotiation process, the contracting
officer will furnish copies of the drawings or sketches to DSC for filming
within 30 days of approval, to avoid loss. The contracting officer should
also notify TIC by e-mail or written memorandum if the modification is
not executed in writing. In addition, the contracting officer is responsible
for incorporating the changes into the as-built drawings and furnishing
copies of the approved as-constructed drawings to DSC for microfilming.
If sketches are used rather than standard drawing sheets, they should
include the project and drawing numbers, project title, person responsible
for drawing, and the date prepared.
10. Orientation. When possible, drawings will be laid out so north
is toward the top, or left, of the drawing sheet. The orientation of north
should be maintained throughout a set of drawings, when possible. Where
a north arrow is required, it should be placed in the lower right-hand
corner above the title block. If multiple north arrows are used on the
same sheet, place each arrow near the title of the specific view. Additional
guidance on north arrows, including recommended style therefor, is contained
in Reference Manual 10A.
11. Scale. All scales used will be graphic scales. If a single
scale applies to an entire drawing sheet, place it above the title block.
If an entire sheet is not to scale, "NO SCALE" should appear
above the title block. Should more than one scale appear on a sheet, place
scales below the title of each section or detail (if a specific section
or detail is not to scale write "NO SCALE" below the title of
that section or detail). If more than one scale is used on a sheet, but
one or more is used repeatedly, group all scales above the title block
and reference the corresponding section or detail. Guidance for drawing
section or detail symbols is found in Reference Manual 10A.
C. Drafting Practices
1. Line Weights. All NPS drawings, particularly construction drawings
being issued for bid, are microfilmed, and therefore must be capable of
being reproduced as clear and legible half-sized prints. Consistency of
line density and clear, legible lettering are essential. Originals and
photographic duplicates that cannot be reproduced as clear and legible
half-sized prints are unacceptable. The following drafting practices,
illustrated in Reference Manual 10A, ensure legible bid sets:
· consistent even line weight;
· lack of line congestion;
· line weights of additions or changes match existing line weights;
· drawings are clean and uncreased;
· little or no erasures;
· consistent dark, clear, sharp, uniform lines to ensure good reproduction
· outlines and section lines are differentiated by varying the
width of lines, not by changing densities; the density of the line should
· line work techniques used for distinctive symbols and crosshatching;
· pencil is not used for shading or toning;
· consistent open spacing of lines and lettering;
· absence of graphics behind text to ensure good legible drawings;
· layout lines and guidelines are used in such fashion so as not
to appear on reproduced drawings.
2. Screened Pens. New work will be easily distinguishable from
other information shown on drawings. New work will be shown at 100% (unscreened);
existing conditions, including text, will be screened at 50%. Background
information shown for orientation or clarification may be screened at
3. Additions and Changes. Additions, changes, and corrections will
be marked on check prints and as-constructed prints using the following
color code: (1) RED-additions; (2) GREEN-deletions; (3) BLUE-general notation
or specific instruction to draftsman; and (4) YELLOW-okay as shown (use
4. Abbreviations. All abbreviations will be described in a legend
and used consistently throughout a set of drawings. See Reference Manual
10A for NPS recommended abbreviations.
5. Dimensions. All dimensions 1'-0" and over will be called
out in feet and inches. If another measurement is accepted industry-wide
to describe a product or spacing, such measure should be used. For example,
48" pipe (not, 4'-0" pipe), and 16"o.c. (not, 1'-4"
o.c.). Both slash marks and arrows are acceptable as line terminators
as long as they are used consistently.
6. Details. If a detail of a certain item is enlarged, it will
be shown with the same orientation as the item itself; detail will not
be turned 90 degrees or shown in reverse direction.
7. Use of Text. Text within drawings will be limited to required
notations, avoiding duplication of information within the drawings and
the written specifications.
8. Lettering. Only one lettering style, vertical and all uppercase,
will be used in drawings. Standard lettering height is .130. For all line
weight and lettering height specifications, see Reference Manual 10A.
9. Symbols. NPS-preferred symbols and line symbols with abbreviations
for the most common drawing elements can be found in Reference Manual
10. Discipline-Specific Requirements. See Reference Manual 10A
for discipline- specific drawing requirements, such as slope designations
for site drawings, building code data for architectural drawings, and
design information requirements on structural drawings.
D. Archival Quality
1. Minimum Life Expectancy. The NPS is responsible for the lifetime
administration and maintenance of its buildings. Accordingly, the materials
used for all drawings must have a minimum life expectancy of 100 years.
Various reproduction methods, such as ink jet and diazo printing, and
wash-off photographic processes, do not produce acceptable archival products.
Drawing production standards for archival copies are summarized in Reference
2. Photo Techniques. An A/E firm wishing to use photo drawing
techniques (for example, photos of a site or building), must provide the
NPS with a high quality half-size photographic mylar reproducible of the
photo drawing sheet in addition to the full-size original. When photographs
are used as information on a photographic sheet, such photos will be screened
using a magenta or gray halftone screen with 120 dots per inch, with either
conventional square dots or elliptical dots, for both standard 22"
x 34" and half-sized drawings. The half-sized reproducible must be
capable of producing clear, legible prints using the xerographic printing
3. Microfilming and Indexing. All completed and approved drawings
should be sent to DSC for microfilming and indexing in paper or mylar
format (as required by drawing phase). Electronic files of the drawings
should also be forwarded to DSC for archival storage in accordance with
Director's Orders #19: Records Management, and #10B: Drawing and Map Numbers.
E. Drafting and Detailing References
A list of detailed manuals used by the NPS in the preparation of drawings
can be found in Reference Manual 10A.
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