Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Blueprint Letters

Letters commonly used to differentiate blueprint drawings.

Blueprint drawing letters

Blueprints are often differentiated by the letters

  • A - Architectural pages
  • E - Electrical pages
  • M - Mechanical pages
  • P - Plumbing pages
  • S - Structural pages

Architectural pages includes plans for building and surrounding areas.

Electrical plans shows the buildings electrical system.

Mechanical plans shows heating, air conditioning and process piping systems.

Plumbing plans shows the plumbing system.

Structural plans shows the structure of the building including concrete, masonry, wood framing, roof plans ....

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The Engineering ToolBox provides a wide range of free tools, calculators, and information resources aimed at engineers and designers. It offers detailed technical data and calculations for various fields such as fluid mechanics, material properties, HVAC systems, electrical engineering, and more.

The site includes resources for common engineering tasks, such as calculating physical properties (e.g., density, viscosity, thermal conductivity), converting units, and designing systems like heating and water distribution.

With sections on everything from acoustics to hydraulics, it serves as a comprehensive tool for both students and professionals in technical and engineering disciplines.

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