Drawing symbols
DRAWING SYMBOLS Because of the small scale used in most drawings, standard graphic symbols are used to present complete information concerning con- struction items and materials. These typical symbols are used so frequently in construction drawings
DRAWING SYMBOLS
Because of the small scale used in most drawings, standard graphic
symbols are used to present complete information concerning con- struction
items and materials.
These typical symbols are used so frequently in construction drawings
that their meanings must be familiar not only to the preparer, but to the user as
well. The main information sources for a particular symbol are the Military
(Drawing) Standards (MIL-STD)
and the American National Standards Institute (ANSI). Refer to these
standards before you use other references. Listed below are some of the most
commonly used military standards and the particular symbols they carry.
Standard Description
MIL-STD-14 Architectural Symbols (latest revision)
MIL-STD-17-1 Mechanical Symbols (latest revision)
MIL-STD-18 Structural Symbols (latest revision)
ANSI Y32.9-1972 Graphic Symbols for Electrical Wiring and
Layout Diagrams Used in Architecture and Building Construction
ANSI Y32.4-1977 Graphic Symbols for Plumbing Fixtures for
Diagrams Used in Architecture and Building Con- struction
ANSI/AWS A2.4-1986 Symbols for Welding
Sometimes you may notice that other symbols are not included in any
of the standards mentioned earlier. These symbols, like the ones shown in figure
10-6, can be found in one of the military handbooks developed by
NAVFACENGCOM for project drawings.
As an EA, you will find that your knowledge of applicable symbols
will greatly assist you in accomplishing the job correctly and
promptly, and, above all, with confidence. Some of the basic architectural and
welding symbols are shown in figures 10-7 through 10-10. Other types of
symbols are shown in the appendix section of this book.
Figure 10-6.-Symbols used to identjfy sections, elevations, and details.
DRAWING NOTES
NOTES are brief, clear, and explicit statements regarding material
use and finish and construction methods. Notes in a construction drawing are
classified as specific and general. SPECIFIC notes are used either to reflect
dimensioning information on the drawing or to be explanatory. As a means of
saving space, many of the terms used in this type of notes are often expressed as
abbreviations. GENERAL notes refer to all of the notes on the drawing not
accompanied by a leader and an arrowhead. As used in this book, general
notes for a set of drawings covering one particular type of work are placed on the
first sheet of the set. They should be placed a minimum of 3 in. below the space
provided for the revision block when the conventional horizontal title block
is used. When the vertical title block is used, you may place the general
notes on the right side of the drawing. General notes for architectural
and structural drawings may include, when applicable,