A scaffold sleeve coupler, also known as a joint pin or spigot pin, is a type of scaffold fitting used to connect two scaffold tubes end-to-end in a straight line.

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A Comprehensive Guide to Types of Couplers in Scaffolding

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Scaffolding is a temporary structure used in construction to support workers and materials during the building or maintenance of structures. Couplers are essential components of scaffolding, serving to connect scaffold tubes securely and ensure structural stability. Here is a comprehensive guide to various types of couplers commonly used in scaffolding:

1. Swivel Couplers:

Function: Swivel couplers connect two scaffold tubes at any angle, providing flexibility in creating various configurations.

Design: Consists of a swiveling head that allows adjustment to different angles. Commonly used for diagonal bracing.

2. Right Angle Couplers:

Function: Right angle couplers connect scaffold tubes at right angles, forming the primary structure of the scaffolding.

Design: Features jaws designed to hold two tubes at a 90-degree angle. Essential for creating the main framework of scaffolding structures.

3. Putlog Couplers:

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Function: Putlog couplers connect ledgers (horizontal tubes) to transoms or putlogs (vertical tubes), providing support for scaffold boards.

Design: Consists of a single clamp to secure the ledger tube to the putlog or transom tube.

4. Sleeve Couplers:

Function: Sleeve couplers connect two scaffold tubes externally, providing a strong and secure joint.

Design: Comprises a cylindrical sleeve that fits over the tubes and is secured with bolts or pins. Ensures stability and alignment of tubes.

5. Girder Couplers:

Function: Girder couplers connect scaffold tubes to steel beams or girders.

Design: Typically designed with a wide jaw to accommodate larger tubes and provide a secure connection to steel beams.

6. Board Retaining Couplers:

Function: Board retaining couplers secure scaffold boards in place, preventing them from slipping or moving.

Design: Features a clamp mechanism that tightly holds the scaffold board. Ensures a stable working platform.

7. Joint Pin Couplers:

Function: Joint pin couplers connect two scaffold tubes end-to-end to extend the overall length.

Design: Consists of a pin that passes through the tube ends and is secured with a locking collar or nut. Used to extend scaffold tubes.

8. Base Plate Couplers:

Function: Base plate couplers secure scaffold tubes to the ground or base plates.

Design: Typically used at the bottom of vertical scaffold tubes to provide stability and support. Helps in distributing the load on the scaffold.

9. Drop Forged Couplers:

Function: Drop forged couplers are heavy-duty couplers designed for increased strength and durability.

Design: Manufactured through a forging process, making them stronger than some other types of couplers. Suitable for demanding scaffolding applications.

10. Putlog Head Adapters:

Function: Putlog head adapters are used in conjunction with putlog couplers to support scaffold boards.

Design: Designed to securely hold the putlog or transom in place, providing a stable platform for scaffold boards.

Understanding the functions and designs of different Scaffolding couplers is crucial for the safe and effective assembly of scaffolding structures. Proper selection and use of couplers contribute to the overall stability and reliability of the scaffolding system, ensuring a secure working environment for construction and maintenance activities.

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