The drop forged double coupler is the primary structural connection in tube and fitting scaffolding, joining two 3.2mm scaffold tube and 4.0mm scaffold tubes at right angles to form the framework of standards, ledgers, and transoms. Manufactured by the drop forging process for maximum strength and density, it is the most specified coupler on UK construction sites.
Altrad Generation drop forged double couplers comply with BS EN 74-1:2005 and are available for hire and sale. Pair them with scaffold tube, drop forged swivel couplers, and scaffold base plates for a complete, compliant scaffold system.
Drop Forged Double Coupler Specification
Complies with BS EN 74-1:2005 for right-angle couplers in tube and fitting scaffolding
Minimum 9.1kN slip load to BS EN 74-1:2005 specification
Drop forged steel construction for maximum strength and density
Fits 3.2mm and 4.0mm scaffold tube across the full Altrad Generation tube range
Available in standard finish or powder-coated finish for brand identification
Available for hire and sale
Drop Forged vs Pressed Steel Couplers
Specify drop forged double couplers for all primary structural connections in loaded scaffold bays. The drop forging process produces a denser steel structure with higher certified load capacity than pressed steel alternatives. Where budget constraints require, pressed steel double couplers provide a compliant alternative for lower-load and temporary applications.
Powder Coated Finish for Brand Identification
Altrad Generation drop forged couplers are available in a powder-coated finish in your brand colour with company markings for asset traceability. This service is available across the full scaffold fittings range. Contact your local branch to discuss branded fittings for your fleet.
Frequently Asked Questions
Q. What is a drop forged double coupler used for?
A. A drop forged double coupler joins two scaffold tubes at right angles to form the primary structural connection in tube and fitting scaffolding. You use it to connect standards to ledgers and transoms throughout the scaffold structure. It is the most commonly specified coupler in UK scaffold construction.
Q. What standard does the drop forged double coupler comply with?
A. Altrad Generation drop forged double couplers comply with BS EN 74-1:2005, the British and European Standard for couplers used in tube and fitting scaffolding. This standard specifies the strength, dimensions, and testing requirements for right-angle couplers.
Q. What is the slip load of a drop forged double coupler?
A. BS EN 74-1:2005 specifies a minimum slip load of 9.1kN for a right-angle coupler on 3.2mm and 4.0mm scaffold tube. Altrad Generation drop forged double couplers are tested and certified to meet this requirement.
Q. What is the difference between a drop forged and a pressed steel double coupler?
A. Drop forged couplers are manufactured by forging heated steel under high pressure, which produces a denser, stronger fitting with higher load ratings. Pressed steel double couplers are formed from sheet steel and offer a more economical alternative for lower-load applications. Specify drop forged for primary structural connections and loaded platforms.
Q. How many scaffold tubes does a double coupler connect?
A. A double coupler connects exactly two scaffold tubes. It clamps around both tube bodies to create a rigid right-angle connection. For three-tube junctions, use a combination of double couplers or specify a swivel coupler for angled connections.
Get in Touch with Us
Contact your local Altrad Generation branch to discuss drop forged double couplers and scaffold fittings, or find your nearest branch using our branch locator.
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