What is Technical Drawing? – Tools, Techniques, Processes all explained.

Are you a student or one aspiring to know what is Technical Drawing? This is an essential skill for anyone looking to create precise and accurate plans and diagrams. It is used in the fields of engineering, architecture, and design, and is the foundation of all types of technical drawing. 

This article will provide an overview of the principles of technical drawing, the tools and techniques used, and the basic processes involved in creating a technical drawing.

What is Technical Drawing?

Technical drawing is a type of drawing that is used for creating precise technical illustrations and diagrams. A fundamental talent for any aspiring engineer or architect, it is a kind of communication utilized in engineering and architecture. Technical drawings employ symbols, lines, forms, and text to represent information and concepts. Technical drawings are made with the intention of conveying information to others by providing a visual representation of an object or concept. 

To produce precise drawings, technical drawing needs the use of specific equipment and methods, such as orthographic projection and isometric drawing. Technical drawing is an important skill for any engineer or architect, and mastering it can help them create better designs and communicate their ideas more effectively.

Different Types of Technical Drawing:

  1. Architectural drawings: Architectural drawings are used to show how buildings and other structures are laid out and designed.
  1. Mechanical drawings: Mechanical drawings are used to display the specifics of mechanical systems and machines.
  1. Electrical drawings: Electrical drawings are used to show how electrical systems are laid out and designed, including wiring diagrams and schematics.
  1. Structural drawings: Structural drawings are used to show how beams, columns, and foundations are laid out and designed.
  1. Drawings of piping and plumbing systems: Drawings of piping and plumbing systems are used to display their organization and design.
  1. Drawings of landscaping: Drawings of landscape are used to show how outdoor areas, such as gardens and parks, are laid out and designed.
  1. Flow diagrams: Flow diagrams are used to depict how information, energy, or materials move through a system.
  1. Topographical drawings: Topographical drawings are used to depict the shape, composition, and peculiarities of the terrain.
  1. Assembly drawings: Assembly drawings are used to demonstrate how a product’s component parts fit together.
  1. Isometric drawing: Using isometric drawings, two-dimensional representations can depict three-dimensional objects.

Benefits of Technical Drawing

  1. Technical drawings are used to convey design concepts and requirements to engineers, producers, and other technical experts.
  1. Precision is crucial in professions like engineering and architecture, thus technical drawings are extremely accurate and precise.
  1. Technical drawings can be used to find and fix design issues before something is built or manufactured.
  1. Technical drawings can be used to spot areas in a design where money could be saved by lowering the number of parts or streamlining the production process.
  1. Because technical drawings provide a precise picture of the item or system being created, they are simple to grasp even for those who are not specialists in the topic.
  1. Technical drawings serve as a common language for teams of engineers, architects, and other technical specialists.
  1. Technical drawings can be used to find and fix design issues before something is built or manufactured.

Challenges of Technical Drawing 

1. Dimensioning

Technical drawings must be dimensioned precisely in order to guarantee that the final product is manufactured correctly. This entails marking each dimension clearly and using the appropriate measuring units.

2. Scale

Technical drawings must be produced in the proper scale in order for their users to be able to read and comprehend them.

3. Drafting standards

To be easily understood by individuals working in the manufacturing or construction industries, technical drawings must follow accepted drafting conventions, such as line kinds and symbols.

4. Accuracy

To guarantee that the final product is manufactured correctly, technical drawings must be accurate. This entails checking that all measurements and angles are accurate as well as the placement of any notes or labels.


5. Readability

Even when viewed at a small size, technical drawings must be easily visible and understood. This entails employing text that is easy to read as well as offering enough context and information for the drawing to be self-explanatory.

6. Data format

Technical drawings need to be stored in a format that can be opened by the program that will be used to work with them. This might contain CAD software like AutoCAD, Solidworks, or others.

7. Version management

To guarantee that the most recent version is being used, technical drawings should be version managed. You can do this by manually stamping the drawings with a revision number or by utilizing software like Git.

Technical Drawing Tools

  • Pencils (mechanical and traditional)
  • Drafting scales
  • T-squares
  • Triangles (45-degree and 30-degree/60-degree)
  • French curves
  • Compass
  • Erasers (kneaded and plastic)
  • Drafting paper
  • Drafting board
  • Protractor
  • Ellipse guides
  • Curves templates
  • Set squares
  • Ink pens
  • Autocad software


In conclusion, technical drawing is a crucial ability in many industries, such as manufacturing, engineering, and architecture. Using industry-standard symbols, lines, and annotations, it offers a precise way to record and communicate design concepts and requirements. 

Any built or manufactured thing must go through the process of technical drawing, which enables accurate and effective communication between designers, engineers, and builders. This makes this subject a crucial tool that permits the construction of precise, useful, and aesthetically beautiful designs, whether one is designing a structure, a machine, or a consumer product.

Frequently Asked Questions

Why is technical drawing important?

Technical drawing is important because it helps to ensure that a product or structure is built correctly and efficiently by providing clear and precise instructions.

How do you read technical drawings?

To read technical drawings, one should be familiar with standard conventions and symbols used in technical drawing. A good understanding of geometry and spatial relationships is also helpful.

Is technical drawing a skill that is still in demand?

Yes, technical drawing is still a valuable skill in many industries, particularly in fields such as architecture, engineering, and manufacturing. With the rise of 3D modeling, some form of CAD software knowledge is also in demand.




0 0 votes
Please rate this page

Notify of
Inline Feedbacks
View all comments
Would love your thoughts, please drop comment.x