TS EN 4408-005

TS EN 4408-005 is the seams part of the aerospace series for the representation of parts made of composite materials in technical drawings. It addresses both how composite seams are represented and what information must be indicated on the drawing. In aerospace documentation, composite parts often need a different drawing language from metallic parts because the material structure, joining details, and local features can affect interpretation and manufacture.

What seam representation means in drawing practice

In general technical drafting, a seam is a local joining feature between surfaces, plies, or elements. In composite structures, such details are important for understanding assembly intent, manufacturing method, and the local behaviour of the part. This standard supports a consistent way of showing that feature on drawings so design, production, and inspection teams can work from the same notation logic.

How the drawing information is organised

The scope is not limited to marking the seam visually; it also covers the information to be indicated in the technical drawing. In general engineering terms, that means the relevant feature needs to be identified clearly in relation to its position, orientation, repetition, and references on the drawing. For composite parts, that clarity helps reduce ambiguity on complex surfaces and supports the consistency of manufacturing documentation.

• Applies to the representation of parts made of composite materials in technical drawings.
• Specifically covers seams.
• Also addresses the information to be shown in the drawing.
• It is a part standard within an aerospace series.
• It is linked to TS EN 4408-001 in the same series.