Heavy-Duty Scaffolding Couplers (Double, Swivel, and Putlog Types)

Our high-quality scaffolding couplers are engineered to provide maximum load-bearing connection stability in tube and clamp scaffolding systems. Manufactured under the trusted TFCO brand by Tianjin Friend Steel Group, these essential structural fittings include drop-forged and pressed steel right-angle (double), swivel, and putlog (single) couplers. Fully certified to EN74 and BS1139 European standards, TFCO couplers ensure the structural integrity of your scaffolding frameworks on demanding construction sites worldwide.

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heavy duty scaffolding couplers (double, swivel, and putlog types)

Technical Specifications

Specification Data Details
Material Q235 Carbon Steel, Premium Drop-Forged Steel, Pressed Steel
Coupler Types Available Double Coupler (Fixed 90°), Swivel Coupler (360°), Putlog Coupler (Single), Sleeve Coupler
Standard Compliance EN 74 Class A & B, BS 1139 Standard
Applicable Tube Diameter 48.3 mm / 48.6 mm Outer Diameter
Manufacturing Process Drop Forged, Pressed Steel
Surface Treatment Electro-Galvanized (Zinc Plated), Hot-Dipped Galvanized (HDG), Self-Color
Unit Weight Double Coupler: 0.98 - 1.0 kg | Swivel Coupler: 1.12 - 1.15 kg | Putlog Coupler: 0.60 - 0.63 kg
Tightening Torque 54 Nm (Standard setting)
Thread & Nut Options T-Bolts and Collar Nuts (Size: 21mm or 22mm)

Key Advantages

Exceptional Load-Bearing Durability: Manufactured through a high-precision drop forging or heavy-duty pressing process using structural carbon steel, our couplers offer high yield strength and extreme resistance to mechanical deformation under structural loads.
Strict Standard Compliance: Fully tested and certified in accordance with EN74 (Class A/B) and BS1139 standards. These couplers maintain rigid slip resistance and structural torque values to guarantee compliance on strict commercial jobsites.
Superior Corrosion Protection: Available with premium electro-galvanized or hot-dipped galvanized finishes, our couplers resist oxidation, rust, and abrasion, extending their operational lifespan even in highly humid or coastal environments.
Universal Fit and Easy Tightening: Designed to fit standard 48.3mm or 48.6mm outer diameter scaffolding tubes. Equipped with heavy-duty T-bolts and nuts that allow for rapid, secure tightening with standard impact wrenches.

Product Applications

Tube and Clamp Scaffolding Systems: Essential for constructing independent tied scaffolds, birdcage scaffolds, and heavy-duty structural shoring configurations.
Bracing and Angle Enforcement: Swivel couplers allow for the precise erection of diagonal braces and irregular structural supports at any angle.
Platform Ledger and Transom Connections: Putlog couplers safely secure non-load-bearing ledgers, transoms, and timber/steel scaffold boards.
Temporary Structural Frameworks: Widely used in outdoor staging, temporary storage structures, and grandstands to lock structural piping.

Packaging & Delivery

Packaging: Neatly packed in heavy-duty woven bags (typically 25 or 30 pieces per bag) and securely stacked on steel-strapped wooden or steel pallets to prevent shifting during sea freight.
FOB Loading Port: Tianjin Port, China (ensuring streamlined global shipping and container optimization managed by Tianjin Friend Import and Export Co., Ltd.).
Quality Control: Each production batch is subjected to strict dimensional audits, thread and bolt inspections, slip resistance load tests, and zinc coating thickness measurements.

Frequently Asked Questions (FAQ)

Q: What is the structural difference between a double coupler and a putlog coupler?
A: A double (right-angle) coupler is a load-bearing connector designed to join two intersecting pipes at exactly 90 degrees. A putlog (single) coupler is non-load-bearing, designed specifically to locate and secure transoms or putlogs to structural ledgers.

A: We highly recommend our Hot-Dipped Galvanized (HDG) couplers for marine or high-humidity applications, as the thicker zinc coating provides superior rust protection compared to standard electro-galvanized finishes.

A: Yes. All TFCO scaffolding couplers are systematically tested and certified to comply with EN74 (Class A & B) and British Standard BS1139 requirements.

A: Yes, absolutely. As a prominent division of Tianjin Friend Steel Group, we specialize in consolidating various scaffolding components (including tubes, couplers, planks, and frame jacks) into single containers to minimize shipping costs.

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