Everything you need to know about technical drawings

technical drawings

What are technical drawings?

As the name suggests, technical drawing is the descriptive and accurate drawing of products, structures, or systems.

Drafting software or hand helps draft these drawings as needed. To convey significant information, we use Dimensions, annotations, and symbols.

Engineers, designers, and manufacturers use these technical drawings to share their ideas. They also use it to ensure accuracy and fulfil industry standards and requirements.

There are various sorts of technical designs available. To name some, we have mechanical, architectural, electrical, and civil engineering drawings. Each of these drawings comes with its own set of standards and norms.

Technical drawings are a significant tool for designing and manufacturing products or structures.

They also have a meaningful role in making sure that the building constructed comes out accurate, safe, and is cost-economic.

What is the need for Technical Drawings?

Technical drawings are important because of the following factors:


Designers, engineers, and manufacturers use technical drawings to communicate and share their ideas and visuals.

These drawings provide a visual presentation of the product or structure, helping to convey every minute yet significant detail, such as dimensions, materials, and specifications.


Technical drawings help with exact dimensions and tolerances. They ensure that the product or structure manufactured or constructed is accurate and meets all the required standards.


In general, we use technical drawings to store records of designing and manufacturing processes.

They store a product or structure’s history, which is then used for maintenance, repair, and replacement.


Technical drawings guarantee that the products or structures you plan and build are under safety requirements. They provide vital information such as load-bearing capacity, structural integrity, and material specifications.


It can point out potential errors before construction or manufacturing starts. Technical drawings help avoid the extra expenses that can go into fixing the error.

Thus, you can make changes earlier in the design process, saving time and money in the long run.

When dealing with technical drawings, use the following fundamental concepts and terms:

Types of Technical Drawings:

We can categorize Technical drawings into many types:

  • mechanical,
  • architectural,
  • electrical,
  • and civil engineering drawings.


We often use a specific scale to make technical drawings. This scale allows the viewer to understand the relationship between the drawing and the actual size of the product or structure.

We can represent this scale as a ratio of 1:50 or 1/4 inch = 1 foot.


The technical drawing may present a new view of the same object from various angles, such as top, front, and side views.

These different views of the same object give a descriptive presentation and give an idea of its size and dimensions.


We use dimensions, such as an object’s length, breadth, and height, as the measurements of technical designs.

Symbols and lines often depict dimensions. They show the product’s tolerance limits and precision.


Symbols are graphical representations of specific products, structural elements, or materials. Welding, electrical, and architectural symbols are examples of symbols.

Title block:

In technical drawings, the title block is that section that delivers relative information. This information includes title, author, date, and revision history.

Drawing standard:

Last but not least, the drawing standards. Technical drawings must follow specific industry standards to maintain uniformity and correctness. These requirements may differ based on the type of drawing and the industry in which it is used.

How to Create Accurate And Reliable Technical Drawings in Manufacturing

To create the Technical Drawing in Manufacturing, one must have fast hands to ensure accuracy, clarity, and precision. When generating technical drawings for manufacturing, consider the following steps:

Have a clear understanding of requirements:

Before starting to draft the technical designs, the maker must have a clear and firm grip on understanding the requirements of the system or product.

These requirements include dimensions, materials, and other specifications that must be correctly used in the drawing.

Make the right choice of software or tool:

To draft technical drawings, there is a wide range of software and tools available, such as AutoCAD, SolidWorks, or SketchUp.

Select the tool that fits a particular type of drawing and the one that fulfils the project’s requirements.

Use standard conventions:

We use conventional conventions to depict dimensions, symbols, and other features in technical drawings.

To maintain consistency and accuracy, adhere to the following guidelines.

Always begin with a rough sketch:

Making the first move with a concept drawing or rough sketch plays a major role in laying out. It helps in making a much more accurate technical drawing.

This one step can lead you to work on your errors and find a way to fix them initially.

Give more concern to clarity:

Technical drawings should be clear and easy to understand. Use a uniform style for lines, text, and symbols, and mark all drawing elements explicitly.

Include all relevant information:

You must include dimensions, materials, tolerances, and other parameters in technical drawings. This ensures that you are correctly constructing the product or structure.

Test the accuracy:

Whether your technical drawing is 100% accurate or not, we can not say only through an accuracy test before finalising your copy.

Look closely at all the dimensions and specifications to ensure accuracy. Also, check if the drawing matches the project’s scale of requirements.

Drafting an accurate and precise technical drawing in manufacturing demands knowledge, required skills, and a firm grip on the specifications.

Once you follow the steps mentioned above and keep practising, the technical drawing will always be accurate and crystal clear and will fulfil every need of the product demanded.