Title Block

PARTS OF A BLUEPRINT

brown, black, gray, or maroon. The differences are the

types of paper and the developing processes used.

Military blueprints are prepared as to size, format,

A patented paper identified as BW paper produces

location of, information included in various blocks, and

prints with black lines on a white background.

so on, according to MIL-STD-100E of 30 September

1991. The various parts of a blueprint are described

The ammonia process, or OZALIDS, produces

briefly in the following paragraphs.

prints with either black blue, or maroon lines on a white

background.

Title Block

Other processes that may be used to reproduce

drawings, usually small drawings or sketches, are the

The Title block is located in the lower right-hand

office-type duplicating machines, such as the

corner of all blueprints and drawings prepared

mimeograph and ditto machines. One other type of

according to MIL-STDs. The block contains the

duplicating process rarely used for reproducing working

drawing number, the name of the part or assembly that

drawings is the photostatic process in which a large

the blueprint represents, and all information required to

identify the part or assembly. The Title block also

camera reduces or enlarges a tracing or drawing. The

includes the name and address of the government

photostat has white lines on a dark background when

agency or organization preparing the drawing, the scale,

reproduced directly from a tracing or drawing. If the

drafting record, authentication, and the date (fig. 3-1).

photostated print is then reproduced, it will have brown

A space within the Title block with a diagonal or

lines on a white background. Photostats are generally

slant line drawn across it (not shown in fig. 3-1)

used by various businesses for incorporating

indicates that the information usually placed in it is not

reduced-size drawings into reports or records.

required or is given elsewhere on the drawing.

Military drawings and blueprints are prepared

according to the prescribed standards and procedures in

Revision Block

military standards (MIL-STDS). These MIL-STDS are

listed in the Department of Defense Index of

The Revision block (not shown) is usually located

Specifications and Standards, issued as of 31 July of

in the upper right-hand comer of the blueprint and is

e a c h year. Common MIL-STDS concerning

used for the recording of changes (revisions) to the print.

All revisions are noted in this block and are dated and

engineering drawings and blueprints most commonly

identified by a letter and a brief description of the

used by IC Electricians are listed by number and title as

revision. A revised drawing is shown by the addition of

follows:

a letter to the original number, as shown in figure 3-1,

TITLE

NUMBER

view A. If the print shown in figure 3-1, view A, was

again revised, the letter A in the Revision block would

MIL-STD-100E Engineering Drawing Practices

be replaced by the letter B.

MIL-STD-12D

Abbreviations For Use On

Drawings

Drawing Number

ANSI Y32.2

Graphic Symbols For Electrical

and Electronics Diagrams

All blueprints are identified by a drawing number

(NAVSHIP Systems Command number, fig. 3-1, view

MIL-STD-15

Electrical Wiring Equipment

A, and Naval Facilities Engineering Command drawing

Part No. 2

Symbols For Ships Plans, Part 2

number, fig. 3-1, view B), which appears in a block. It

ANSI Y32.9

Electrical Wiring Symbols For

may be shown in other places also; for example, near

Architectural and Electrical

the top border line in the upper comer, or on the reverse

Layout Drawings

side at both ends so it will be visible when a drawing is

rolled up. If a blueprint has more than one sheet, this

MIL-STD-16C

Electrical and Electronic

information is included in the Number block indicating

Reference Designations

the sheet number and the number of sheets in the series.

Nomenclature and Symbols For

MIL-STD-25A

For example, note that in the Title block shown in figure

Ship Structure

3-1, the sheet is sheet 1 of 1.

3-2