Standard CAD Drawing Frame Size: Unlocking the Secrets | MachineMFG

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Standard CAD Drawing Frame Size: Unlocking the Secrets

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Like illustrations and text, technical drawings serve as one of the primary tools for humans to express design concepts, facilitate technical communication, and organize construction and production.

They act as the “common language” in the engineering field. As with any “common language,” there are shared standards, and drawing frames also adhere to a set of such standards.

According to the current drafting standard GB/T14689-93, various standard paper sizes for drawings are outlined.

These should be prioritized when creating engineering drawings. If necessary, the length of the sides can be extended, but the extent of the extension must comply with the standard regulations.

Below are the standard sizes for A4 to A0 drawing frames.

Drawing Sheet CodeA0A1A2A3A4
BXL841X1189594X841420X594297X420210X297
a25
c105
e20 

Each drawing frame consists of a thickly drawn frame and title bar. If the drawing needs to be bound, a binding edge should be reserved.

For drawings that don’t require binding, there’s no need for a binding edge. The dimensions of the borders around the drawing can be uniform. (See the image below.)

Standard Drawing Frame Without Binding

Standard Drawing Frame with Binding

Title Block Orientation:

The title block can be placed in any corner of the drawing frame, but it’s typically located in the lower right corner, as shown above.

However, there can be exceptions, where it might be positioned in the upper right corner or along the right side. It is recommended to include a directional icon. (See the image below.)

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