The right-angle coupler is a key part to ensure scaffolding structure stability that used for connecting steel tubes intersect perpendicularly (ledger and standard, scissor bracing). It is composed of two symmetrical "U-shaped" clamping plates, bolts, nuts and anti-slip gaskets. The clamping plate acting surface is arc-shaped, with anti-slip tooth patterns inside, which bite the steel tube to enhance connecting force.
Technical Standards and Performance Parameters
Standard dimension | EN 74-1 |
Material requirement | Forgeable cast iron or alum alloy |
Mechanical property | Anti-slip force ≥7.5kN, anti-destruction force ≥25kN |
Surface treatment | Hot galvanized coating ≥55μm |
Test index | Salt spray ≥1000 hours, no rust |
Performance Comparison to Different Couplers
Type | Right-angle coupler | Swivel coupler | Sleeve coupler |
Connecting angle | 90° | 0-360° | Axis-oriental extension |
Core load | Anti-slip | Anti-twist | Tensile and compression |
Structure feature | Cross-shape connect + bolts, anti-slip effect by inner surface convex ribs | Rotable lid-type structure, suitable for diagonal connections | Two semi-circular coupler + fasten bolts, or with wedge. |
Application scenarios | Ledge and standard connection | Diagonal brace and standard connection | Ledge extend, standard rise up |