Right-Angle Couplers also known as double couplers, right-angle couplers are scaffolding coupler used to secure two steel tubes together at a 90-degree angle, creating a robust connection. These couplers are essential components in the assembly of tube-and-coupler scaffolding systems; high-quality right angle couplers ensure the stability, load-bearing capacity, and longevity of the scaffolding structure.
Scaffolding Right-Angle Coupler Specifications
Parameter | Specification |
Product Name | Right-Angle Coupler / Double Coupler / Fixed Coupler |
Connection Type | Fixed 90° connection |
Standard Size | 48.3mm×48.3mm |
Optional Sizes | 48.3mm×48.3mm, 48.3mm×42.3mm, 60.3mm×48.3mm, 60.3mm×60.3mm, 76.1mm×48.3mm, 76.1mm×76.1mm, 89.0mm×48.3mm, 89.0mm×89.0mm, |
Compatible Tubes | 48.3mm OD standard scaffolding tubes and custom heavy-duty scaffolding tubes |
Material | Q345 Steel |
Manufacturing Process | Drop forged and pressed |
Bolt Options | Low-carbon steel T-bolt / Boron steel T-bolt |
Thread | 1/2″ BSW |
Nut Size | 21 mm (standard); 22 mm and 23 mm options available |
Surface Finish | Galvanized (rust-resistant) |
Standards Compliance | BS1139 / EN74 Class B |
Application | Connecting ledgers to standards (verticals) / Load-bearing joints |
Packaging | 25 pcs/bag, 1000 pcs/pallet |
Supply | Bulk orders + export packaging |
Common British Standard Size Specifications
Coupler Specification (Imperial Nominal) | Precise Tube OD (Metric) | Application/Use |
1.5 inch | 48.3 mm | Globally common standard scaffolding tube size for right-angle coupler connections. |
1.5×1.5 inch | 48.3×48.3 mm | Connects two standard scaffolding tubes at a fixed 90° angle. |
1.5×2 inch | 48.3×60.3 mm | Connects a standard scaffolding tube to a larger heavy-duty tube. |
2×2 inch | 60.3×60.3 mm | Connects two heavy-duty scaffolding steel tubes; suitable for industrial applications. |
The 1.5 inch drop forged right angle coupler is the most widely used standard specification globally; it is compatible with steel tubes having an outer diameter of 48.3 mm to form stable scaffolding systems.
Proper Installation Techniques for Scaffolding Right Angle Couplers
1. Inspection: Check the right-angle coupler for damage before use to ensure it is in proper working condition.
2. Installation: Tighten the bolts and nuts during installation to ensure the steel tubes are securely fixed and do not wobble.
3. Load-bearing Capacity: Do not exceed the right angle coupler's rated load capacity during use; doing so may damage the coupler and cause the scaffolding system to collapse.
4. Regular Maintenance: Periodically inspect and maintain scaffolding couplers; promptly service or replace any worn-out right-angle couplers.
Precautions for Installing Scaffolding Right-Angle Couplers
1. When erecting multi-level scaffolding systems, right-angle couplers at every level must be installed securely to ensure the system's stability.
2. Select right-angle couplers that comply with local safety regulations and project load-bearing requirements to ensure proper functionality.
3. Installation must be carried out in accordance with construction drawings and relevant technical specifications to ensure the stability and service life of the right-angle couplers.
Common FAQs
1. What is the safe working load (or design load) for scaffolding right-angle couplers?
Scaffolding right-angle couplers that meet the EN74 standard have a safe working load of 6–9 kN.
Pressed right-angle couplers typically meet EN74 Class A standards, with a safe working load of approximately 6.1 kN – 6.25 kN.
Drop forged right-angle couplers typically meet EN74 Class B standards, with a safe working load of approximately 9.1 kN – 9.4 kN.
2. What are the manufacturing processes for right angle couplers?
Scaffolding right angle couplers are typically manufactured using either forged or pressed processes.
Forged right-angle couplers are the most commonly used accessories in scaffolding systems; they usually feature a hot-dip galvanized (HDG) finish, which provides effective corrosion and rust resistance and enhances durability.
Pressed right-angle couplers are manufactured from 5mm high-strength steel plate; the hot-dip galvanizing process ensures greater durability during repeated use in construction. Based on the galvanizing color, stamped steel right-angle couplers are available in yellow (gold) or blue/white finishes.
3. What are the key features of scaffolding right-angle couplers?
High-quality steel with high load-bearing capacity
Galvanized surface finish for strong corrosion resistance and suitability for repeated use
Compatible with most scaffolding steel tubes
Available with optional low-carbon steel or boron steel T-bolts
4. What are the application scenarios for right-angle couplers?
Scaffolding towers and access systems
Connecting ledgers (horizontal members) to standards (vertical members)
Industrial maintenance scaffolding
Bridge, subway, and high-rise building construction
Diagonal bracing and support structures
Temporary structural support systems
Heavy-duty formwork projects
These couplers ensure secure and reliable connections at critical load-bearing points.
