TS EN 4408-005

TS EN 4408-005 is the fifth part of the aerospace series that addresses how seams in composite-material parts are represented on technical drawings and what information must be indicated on the drawing. In composite structures, a seam is more than a visible joining line: it conveys the intended assembly method, the location of the joint, and the way the part is to be understood in manufacture and inspection.

What seam representation communicates in a drawing

The standard applies to aerospace structures using items linked by seams in dry fabrics, prepregs, film, and similar materials. In general technical documentation practice, this kind of notation helps distinguish a seam from ordinary outline detail and makes the joining feature unambiguous to designers, manufacturers, and drawing readers. For composite parts, that distinction matters because the structural behaviour and fabrication route can depend on how the materials are joined.

Relationship with EN 4408-001

This document is intended to be used together with EN 4408-001. In practical terms, that means the base series provides the common drawing framework, while this part adds the seam-specific representation rules for composite parts. The result is a consistent technical language across related aerospace drawing documents, especially where different composite construction features need to be identified in a uniform way.

• Covers the representation of seams in composite-material parts.
• Applies to aerospace structures.
• Also addresses the information to be indicated in technical drawings.
• Refers to items linked by seams in dry fabrics, prepregs, film, and similar media.
• Must be used together with EN 4408-001.