What is a Putlog Coupler in Scaffolding?
When it comes to safe and efficient scaffolding construction, every component matters—and one crucial but often overlooked piece is the putlog coupler. Whether you’re a construction professional or just curious about how scaffolding structures are assembled, understanding the function and features of a putlog coupler can enhance your knowledge of building safety and standards.
In this article, we’ll explore what a putlog coupler is, how it works, its types and advantages, and why it’s an essential component in scaffolding systems.
What is a Putlog Coupler?
A putlog coupler is a type of scaffolding fitting used to connect a putlog tube (a horizontal member) to a ledger or transom (the vertical or horizontal tube). Unlike other couplers, a putlog coupler is designed to grip only one tube, while the other rests on a surface, such as a wall.
This coupler plays a key role in non-load-bearing connections, especially in bricklayer’s scaffolds, where one end of the putlog tube is embedded into the wall, and the other end is secured to the ledger using the putlog coupler.
How Does a Putlog Coupler Work?
A putlog coupler is clamped around the ledger (horizontal scaffolding tube) and holds the putlog (transverse tube) in place. The putlog’s other end is typically placed into a hole or crevice in the wall, reducing the need for a full frame scaffold and saving material costs.
The coupler is tightened using a wrench, securing the transverse tube firmly in position to support working platforms or planks.
Key Features of a Putlog Coupler
- Simple Design: Usually made of forged or pressed steel with zinc or galvanized coating for rust resistance.
- Fixed 90° Angle: Designed to hold transoms at a right angle to ledgers.
- Quick Assembly: Allows for rapid installation with minimal tools.
- Non-load Bearing: Intended to support scaffold boards, not vertical loads.
- Lightweight: Ideal for small to medium scaffolding setups.
Where is a Putlog Coupler Used?
Putlog couplers are most commonly used in bricklayer’s scaffolding or putlog scaffolds, where one end of the putlog rests in a hole in the wall (known as a putlog hole) while the other end is secured to the ledger with a putlog coupler.
Common Applications Include:
- Masonry and brickwork projects
- Temporary access structures
- Lightweight scaffolding systems
- Situations where wall support is utilized
Putlog Coupler vs. Other Couplers
| Coupler Type | Use | Load-Bearing |
|---|---|---|
| Putlog Coupler | Attaching putlog to ledger | No |
| Right Angle Coupler | Connecting tubes at 90° | Yes |
| Swivel Coupler | Connecting tubes at any angle | Yes |
| Sleeve Coupler | Joining tubes end-to-end | Yes |
Benefits of Using Putlog Couplers
- Cost-Efficient: Requires fewer scaffold tubes
- Quick to Install: Simple one-bolt operation
- Flexible: Ideal for use against walls
- Lightweight: Easy to transport and handle
Safety Considerations
Although putlog couplers are not load-bearing, they must still meet international standards, such as EN 74 or BS 1139, to ensure reliability and safety. When installing:
- Ensure proper torque when tightening the bolt.
- Use with compatible scaffold tubes.
- Never use putlog couplers in place of right-angle couplers for load-bearing joints.
Final Thoughts
A putlog coupler may be a small component in the world of scaffolding, but it plays a significant role in maintaining platform stability and saving material. Especially in projects where scaffolding must be set up against a structure, putlog couplers offer a simple and economical solution.
If you’re sourcing scaffolding couplers, contact us for a complete range of scaffolding solutions at competitive prices.