Engineered Ending Block with 30-80KN Rated Load and 140-180mm Sheave Diameter

Product Specification

Engineered Ending Block for Maintaining Proper Sag and Tension on Dead End Structures

• Essential for Creating Permanent Dead End Terminations:​ The primary and most vital function of the ending block is to serve as the final, fixed anchor point for a conductor. At a dead-end structure, the conductor cannot be allowed to move. The ending block clamps onto the conductor with immense, engineered force, creating a mechanical lock. It transfers the full tensile load from the conductor span into the support structure (pole or tower) and its foundation, establishing a stable endpoint for the line.

• Maintains Critical Line Tension and Designed Sag:​ Proper tension and sag are non-negotiable for a safe and functional overhead line. A slipping or failing termination alters the conductor's length, which directly changes its sag and tension. This can lead to dangerous clearance violations or unbalanced loads on adjacent structures. The ending block is specifically designed to maintain the exact tension set during installation, ensuring the conductor's sag remains constant for decades, regardless of temperature swings, ice loading, or wind.

• Engineered for Superior Mechanical Strength and Secure Grip:​ These blocks are manufactured from high-strength materials like malleable iron, forged steel, or aluminum alloy, often hot-dip galvanized for corrosion resistance. The gripping mechanism—featuring serrated jaws, wedge designs, or compression bolts—is precision-engineered to apply uniform, tremendous pressure on the conductor. This grip must hold the conductor without crushing, notching, or damaging the individual strands, which would create a weak point susceptible to failure under vibration or strain.

• Ensures Long Term System Safety and Reliability:​ A failed dead-end termination can be catastrophic, potentially causing a conductor to fall and leading to extended outages, property damage, or personal injury. The ending block is a component designed for the lifetime of the power line. Its absolute reliability is paramount. Using a properly rated and installed block is a fundamental safety practice that ensures the immense mechanical forces within the line are managed securely.

• Vital for Angle and Strain Structures:​ Beyond simple endpoints, ending blocks are crucial on angle structures where the line changes direction. At these points, the combined vector forces create both tension and side strain. The ending block is engineered to withstand these complex, multi-directional loads, anchoring the conductor securely and preventing it from being pulled out of alignment, which is essential for maintaining the correct line path and geometry.

• Simplifies Installation and Adjustment:​ Modern ending blocks are designed for efficient and precise field installation. Many feature a hinged or two-piece design that can be assembled around the conductor. They are then tensioned and secured using standard tools, allowing linemen to achieve the exact required grip and make fine adjustments to the sag during the installation process.

• Compatible with a Wide Range of Conductors:​ Ending blocks are produced in a comprehensive range of sizes and designs to accommodate different conductor diameters, types, and tensile strengths, including ACSR (Aluminum Conductor Steel Reinforced), AAAC, and others. Selecting the correct block for the specific conductor ensures optimal performance, safety, and longevity.

• Durable Construction for Harsh Environmental Exposure:​ The hot-dip galvanized or equivalent corrosion-resistant finish provides a robust barrier against rust and degradation from rain, humidity, salt spray, and industrial pollution. This durability is critical, ensuring the block maintains its structural integrity and clamping force throughout the decades-long service life of the power line, even in the most challenging environments.

• A Foundational Hardware for Electrical Grid Infrastructure:​ The ending block is a small but absolutely vital piece of hardware in the electrical grid. It is the critical mechanical link that physically secures the current-carrying conductor to the stationary support structure. Its reliable performance is integral to building a resilient, dependable, and safe power transmission and distribution network.

• A Mark of Professional Engineering and Construction:​ The specification and proper use of engineered ending blocks reflect high standards of professional design and construction. It demonstrates a thorough understanding of mechanical forces, a commitment to using components fit for purpose, and a dedication to building power lines that are safe, reliable, and built to last under all operational conditions.