equipment, or parts list. If several sheets are required
suitable for production in quantity. The same basic
for a particular object, the bill of materials may
information is normally included on a production
appear on a separate sheet(s).
drawing format as on a construction drawing format
although the arrangement is different.
d. Revision Block. Space is always left on a
drawing to list revisions as they are made. The
A production
(1) Drawing number.
revision block will show the revision symbol, A, B,
drawing used by a government agency will frequently
C, etc., consecutively as encountered, a brief
have both a manufacturer's drawing number and a
description of the revision, the revision date and
government agency drawing number. Be sure to use
supervisor's approval, and sometimes the zone of the
the government agency number when dealing within
drawing in which the revision was made. If more
the military supply system. In addition, a production
than one copy of a drawing is available, the revision
drawing will often have a five-digit identification
block should be checked to find the drawing with the
code for the manufacturer, for the government
latest revision.
agency, or both. This number is called a Federal
Supply Code (FSC) and permits locating the name
Notations
and address of the manufacturer or agency in
e. Notes and Specifications.
explaining construction methods or specifying
Handbook H 4-1 and -"Federal Supply Code for
materials which are not indicated by symbols are
Manufacturers.: The name and address of the
called specifications. The notes may list allowable
manufacturer and cognizant government agency are
substitutions, special provisions for certain locations,
usually included on the drawing, but the FSC is
additional reference materials, etc. The notes must
helpful because drawings are seldom revised for a
always be read before beginning construction.
change of address whereas the handbook is updated
regularly. If the manufacturer's drawing number is
used for any purpose, it should be prefixed by the
1-11. MILITARY DRAWINGS
FSC to indicate whose drawing number it is. It is
Military drawings are classified as construction
also customary to add the latest revision letter to the
or production drawings, depending on the method of
number since the manufacturer may make additional
manufacture of the object or assembly represented on
revisions to his drawings after the item or drawing is
the drawing or set of drawings. The format of each
supplied to the government. Revision D to drawing
type is arranged differently, although sheet and
number 703145, by a manufacturer whose FSC is
margin sizes are common to both.
90222, would be specified as 90222-703145D. When
the drawings of different sizes are filed separately,
Construction
the drawing size letter (table 1-1) is often shown in
a. Construction Drawings.
drawings are drawings developed to illustrate the
front of the number.
design of structures or other constructions and the
services, utilities, approaches, or any other features
(2) Part number. In most production
involved. Maps (except those with construction
drawing systems, a part number is the same as the
drawings), reports, sketches, presentation drawings,
drawing number for the part except where more than
or renderings are not considered to be construction
one part is included on a drawing. In this case "dash
drawings within the meaning of this standard. The
numbers" are used. Each part covered by a drawing
basic construction drawing format consists of the
will have a dash number assigned and noted on the
margin, the title block with its various subdivisions,
drawing. The part number is the drawing number
the revision block, and the block containing the list of
followed by -1 or -2 etc., as applicable.
material.
Figure 1-33 shows the layout and
dimensions of the typical construction drawing
(3) Application or usage block. Most
format.
production drawings include a block which shows
"next assembly" and "used on" information, as
Production
shown in figure 1-34. The "next assembly" column
b. Production Drawings.
drawings describe equipment or articles that are
will list each assembly
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