There are different national and international standards for symbols and abbreviations. You will need to check out the national standards for the drawings you are referring to.
In architectural or engineering drawings, it is the symbol for diameter
mlottere
The simplest answer is that working to a standard means that anyone can read the drawing. If there is no standard the symbols used on the drawing (weld type and size, surface finish, even the dimensioning of the components) would vary from one drawing (or draughtsperson) to another and cause confusion. Engineering drawings use a large number of symbols to denote operations and instructions (which reduces the time taken to draw them and the size of "paper" they're drawn on). Imagine the potential problems if one person used a symbol to mean "weld" and another one used the same (or similar) symbol to mean "do not weld".
Go to an engineering web site such as arcitechture or mechanical engineering
It depends on what type of engineering drawings. If you want cutsheets for equipment, most manufacturers have drawings on their websites. But if you are looking for construction or assembly drawings manufacturers or companies will not have them available outside the company since these would be intelectual property.
cus if you draw drawings then you draw draweings alot more often
Yes, AutoCAD is used in many engineering fields to create drawings and plans.
Fabricators typically use a variety of engineering drawings, including detailed fabrication drawings, assembly drawings, and shop drawings. Fabrication drawings provide precise specifications for individual components, while assembly drawings illustrate how these parts fit together in the final product. Shop drawings serve as a bridge between the design intent and actual production, detailing how to manufacture and assemble components efficiently. Together, these drawings ensure accuracy, consistency, and clarity throughout the fabrication process.
In drawings, the symbol frequently used to represent all metals is the triangle. This symbol is often seen in various engineering and architectural schematics to denote metallic materials, especially in conjunction with other symbols that specify particular types of metals or alloys.
I don't use engineering drawings.... I guess?!
engineering