(Builder) to illustrate some portion of the work. As a
Builder, you will have to make shop drawings for
minor shop and field projects. These may include
shop itemssuch as doors, cabinets, and small
portable buildings, prefabricated berthing quarters,
and modifications of existing structures.
Shop drawings are prepared from portions of
design drawings, or from freehand sketches based on
the Builders past building experience. They must
include enough information for the crew to complete
the job. Normally, the Builder bases the amount of
required detailing on the experience level of the crew
expected to complete the project. When an
experienced building crew will be doing the work, it
is not necessary to show all the fine standard details.
When you make actual drawings, templates
(when available) should be used for standard
symbols. Standard technical drawing techniques are
recommended but not mandatory. For techniques in
the skill of drawing, refer to Blueprint Reading and
Sketching, NAVEDTRA 10077.
Builders must be able to read and work from
drawings and specifications and make quick, accurate
sketches when conveying technical information or
ideas. Sketches that you will prepare may be for your
own use or for use by other crewmembers. One of the
main advantages of sketching is that few materials are
required. Basically, pencil and paper are all you need.
The type of sketch prepared and personal preference
determine the materials used.
Most of your sketches will be done on some type
of scratch paper.
The advantage of sketching on
tracing paper is the ease with which sketches can be
modified or-redeveloped simply by placing
transparent paper over previous sketches or existing
drawings. Cross-sectional or graph paper may be
used to save time when you need to draw sketches to
scale. For making dimensional sketches in the field,
you will need a measuring tape or pocket rule,
depending on the extent of the measurements taken.
In freehand pencil sketching, draw each line with a
series of short strokes instead of with one stroke.
Strive for a free and easy movement of your wrist and
fingers. You dont need to be a draftsman or an artist
to prepare good working sketches.
Freehand sketches are prepared by the crew
leader responsible for the job. Any information that
will make the project more understandable may be
included, although sketches neednt be prepared in
LEARNING OBJECTIVE: Upon completing
this section, you should be able to interpret
Sectional views, or sections, provide important
information about the height, materials, fastening and
support systems, and concealed features of a
structure. Figure 2-15 shows the initial development
of a section and how a structure looks when cut
vertically by a cutting plane. The cutting plane is not
necessarily continuous, but, as with the horizontal
cutting plane in building plans, may be staggered to
include as much construction information as possible.
Like elevations, sectional views are vertical
projections. They are also detail drawings drawn to
large scale. This aids in reading, and provides
Figure 2-15.Development of a sectional view.