TS EN 4408-003

TS EN 4408-003 is the third part of the standard that defines how parts containing core materials are represented in technical drawings for aerospace applications. Its focus is on presenting the part geometry clearly and specifying which additional information shall appear on the drawing. It is intended to be used together with EN 4408-1, which provides the general rules for representing composite-material parts.

Why core-material parts need special drawing treatment

Core materials form the lightweight central layer in many composite sandwich constructions, typically between face sheets. In aerospace structures, this arrangement is used to achieve high stiffness with low mass, especially in panels and similar structural elements. On technical drawings, these parts need dedicated representation because the face layers, core region, thickness transitions and local details are interpreted differently than in a simple monolithic part. In general technical drafting practice, that distinction helps designers, manufacturers and inspectors read the same intent from the same drawing language.

What this part covers

• How parts including core materials are to be represented on drawings
• Which additional drawing information needs to be indicated
• A common representation language for aerospace composite parts with core structures
• A companion part to be used with EN 4408-1

In broader drafting practice, standards of this kind combine symbols, view conventions and notes so that design intent is communicated without ambiguity. For composite structures, that means the core type, layer arrangement and relevant dimensions can be read within a shared framework across design and production. TS EN 4408-003 is focused on this specific structural category; it does not cover composites in the abstract, but the representation of parts that include core materials.