TS 4929 EN ISO 5261 (Eski no: TS 4929 ISO 5261)

TS 4929 EN ISO 5261 (Eski no: TS 4929 ISO 5261): TS 4929 EN ISO 5261 is a standard for the simplified representation of bars and profile sections in technical drawings. In assembly and detail drawings, it provides rules for showing long or repetitive section geometries in a shortened form while keeping the drawing legible. This makes it easier to prepare and read engineering drawings, especially where many similar structural elements must be shown clearly and efficiently.

Why simplified representation matters

Simplified representation does not change the physical definition of the part; it changes how the part is depicted on the drawing. For bars and profile sections, this reduces visual clutter and avoids repeating geometry that is already understood from the context, dimensions, or accompanying views. The approach is especially useful in structural steelwork, lifting and transport appliances, storage tanks, and pressure vessels, where long members and repeated profiles are common.

Relationship to general drawing rules

The scope states that this standard is complementary to ISO 128 and ISO 129. In practical terms, that means it works alongside the general conventions for technical drawing and dimensioning rather than replacing them. This distinction is important for maintaining consistency across different drawing types and for distinguishing general graphical practice from the specific conventions used for bars and profile sections.

• Applies to assembly drawings and detail drawings.
• Concerns bars and profile sections.
• Covers contexts such as structural metal work, lifting equipment, and storage tanks.
• Functions as a complementary convention to general drawing and dimensioning standards.