Component symbols represent such items as furniture, fixtures, and appliances. Many component symbols are similar to the actual item represented in plan/elevation view.
There are many specialist trades, such as welding, that have their own specific symbols. Figure 8.14 shows examples of basic and supplementary weld symbols and the standard location of elements of a welding symbol. Figure 8.15 and Figure 8.16 are further examples of specialist type symbols.
To summarize, when reading symbols on a blueprint, the following should be remembered:
Placement of symbols on floor plans and elevations may be approximate unless they are dimensioned.
Do not scale a symbol to determine its size. Specific information should be obtained from relevant details, schedules, or specifications.
A symbol’s size may vary according to the scale of the drawing.
Symbols drawn to represent surface materials may cover only a representative portion of an area.
Abbreviations are often used in place of a graphic symbol in order to reduce drawing time and space. A list of architectural/construction abbreviations is given in the Appendix.
Symbols for the same items are usually different in plan, elevation, and section drawings.
Some symbols may use the same or similar graphic treatments in elevation. Check notations, detail drawings, and specifications for identification.