OBJECTIVES
1. Characterize the various stages leading to the production of finished
blueprints.
2. Differentiate between an architectural schematic drawing and a set of
preliminary drawings.
3. Establish why a cover sheet is such an important document.
4. Identify the items of information that would normally appear in the title
block.
5. Describe the various types of lines and symbols that are typically found on
an architectural drawing.
6. Specify the importance of including building material symbols on a
drawing.
7. Explain how topographic symbols help the contractor.
8. Contrast the main differences between an architect’s scale and an
engineer’s scale.
9. Clarify the necessity for working drawings to include a detailed set of
specifications.
Various drawing types include:
Architectural drawings, which show a layout
of the proposed project’s floor plans,
elevations, and details.
Structural drawings, which characterize how
various load-carrying systems will be built.
Mechanical/Electrical drawings, which show
the physical plant of the structure, such as
lighting, power, plumbing, fire protection,
and HVAC.
Various drawing types include: (continued)
Site drawings, which depict the relationship
between the structure and the property it
will occupy, including various site
improvements, such as sanitary systems,
utilities, and so on.
Figure 10-1: Cover Sheet
Figure 10-2:
Title Block
The title block should include the following
information:
The sheet or drawing number, identifying
the group and order to which it belongs.
The drawing name or title, such as “Second
Floor Plan”.
The date of completion of the drawing.
The initials of the draftsperson.
Any revisions to the final set of drawings.
Figure 10-3: Revision Marker
Figure 10-4: Registration Stamp
Figure 10-5: Lines and Symbols
Figure 10-6:
Line Types
The most commonly encountered line types in
architectural drawings are:
Main Object Lines, which define the outline of
the structure, or object. They are thick,
unbroken lines that show the main outlines of
the walls, floors, elevations, details, or sections.
Dimension Lines, which provide the lengths of the
main object lines. They are very light lines with
triangles, resembling arrowheads, on each end.
The number that appears in the center break of
the dimension line represents the measurement of
the specific main object line to which it refers.
The most commonly encountered line types in
architectural drawings are: (continued)
Extension Lines, which are used together with
dimension lines, and are the light lines that extend
beyond the main object lines. The arrowheads of
the dimension lines usually reach and touch the
extension lines.
Hidden Lines, which are light dashes that indicate
the outlines of an object normally hidden from
view, either under or behind some other part of the
structure. The dashes used in this line type are
usually of equal length.
The most commonly encountered line types in
architectural drawings are: (continued)
Center Lines, which are light lines with
alternating long/short dashes, indicating the
center of an object, and frequently labeled with
the letter C superimposed over the letter L.
Figure 10-7: Single Receptacle Outlet Symbol
Table 10-1: Building Material Symbols
Table 10-2: Topographic Symbols
Table 10-3: Electrical Symbols
Table 10-4: Plumbing Symbols
Table 10-5: Climate-Control Symbols
Table 10-6: Architectural Symbols
The three-sided version of the architect’s
scale has ten separate scales, paired in five
groups of two:
1/8-inch and 1/4-inch
1-inch and 1/2-inch
3/4-inch and 3/8-inch
3/16-inch and 3/32-inch
1 and 1/2-inch and 3-inch
Figure 10-8: Architect’s Scale
Figure 10-9: Engineer’s Scale
Table 10-7: Architectural Abbreviations
Table 10-7: Architectural Abbreviations (continued)
Table 10-7: Architectural Abbreviations (continued)
Table 10-7: Architectural Abbreviations (continued)
Table 10-7: Architectural Abbreviations (continued)
Table 10-7: Architectural Abbreviations (continued)
Table 10-7: Architectural Abbreviations (continued)
LAB 26 OBJECTIVE
Identifying Blueprint Symbols
To understand how to identify
standard blueprinting symbols
Figure 10-10:
Conceptual
Plan
TIP
Notice that the conceptual plan includes
several different buildings separated by
two crossing streets. You can be assured
that the master set of blueprints will
include detailed drawings for each of the
buildings shown, in addition to the
building-to-building cabling specification
being used.
TIP
Notice that Figure 10-11 is a miniature
version of the industry standard
blueprint that you just unfolded. It
may be necessary to place objects on
the corners of the industry standard
blueprint to keep it flat.
Figure 10-11:
Industry
Standard
Blueprint
Depiction
LAB 26 QUESTIONS
1
Do all of the symbols shown in the
blueprint relate to cable installations?
LAB 26 QUESTIONS
2
Why could the architectural abbreviation
MC possibly be confusing?
LAB 26 QUESTIONS
3
List the different types of lines that may
occur on an architectural drawing, and
indicate which ones existed on the blueprint
you used for this lab procedure.
REVIEW QUESTIONS
1
What are the various types of
working drawings?
REVIEW QUESTIONS
2
What do the numbers that appear
in the center break of a dimension
line represent?
REVIEW QUESTIONS
3
Why are topographic symbols important
to a communications contractor?
REVIEW QUESTIONS
4
How do architectural drawings relate
to the actual size of the structure they
represent?
REVIEW QUESTIONS
5
Which document takes precedence in cases
where a contradiction between the blueprint and the specifications exists?
REVIEW QUESTIONS
6
What constitutes the main difference
between the architect’s scale and the
engineer’s scale?
REVIEW QUESTIONS
7
What is the primary use for a
revision marker?
REVIEW QUESTIONS
8
Where is a title block usually located
on an architectural drawing?