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 technical drawing standard for the simplified representation of bars and profile sections. In assembly and detail drawings, these elements do not always need to be drawn in full geometric detail; the standard provides rules for a cleaner, faster and more consistent way to show them within established technical drawing practice.

The standard gives complementary rules to ISO 128 and ISO 129. In practical terms, that means the drawing keeps the usual conventions for views, lines and dimensioning, while bars and profile sections can be represented in a simplified form in fields such as structural steelwork, built-up metal constructions, lifting and transport appliances, and storage tanks and pressure vessels. The technical distinction is important: the drawing communicates the presence, type and arrangement of the member without requiring a full detailed depiction of every cross-sectional feature.

Why simplified representation matters

In general technical practice, bars and profile sections are long linear members such as flats, rods and common structural profiles like U, I, L and T sections. Because these components often recur throughout a design, simplified representation reduces drawing clutter, improves legibility and makes dimensions and location data easier to interpret. In complex assemblies, this approach supports consistent documentation and helps keep drawings efficient without changing the underlying engineering intent.

Application areas named by the standard

• Sheets, plates, profiles and assembled metal structures in technical drawings
• Bridges, frameworks and trussed structures
• Lifting and transport appliances
• Storage tanks and pressure vessels