How Deep Should a Strainer Post Be?

When it comes to erecting fences or any structure that requires stability, the depth of strainer posts is a topic that has evolved over time. Let's journey through history, industry standards, and technological advancements to understand this crucial aspect.

The Traditional Approach: 7-8 Foot Strainers

Traditionally, the depth of strainer posts was influenced by manual tools like crowbars and shovels. As a result, the industry standard settled around 7-8 feet. This depth was adequate for soft wire and served its purpose for many years. However, as times changed, so did the demands placed on these posts.

The Shift: Strain on Soft Wire by the Late '60s

The limitations of the 7-8 foot strainers became apparent, especially when high-tensile (HT) wire entered the scene in the late 1960s. The increased tension and demands of this wire type exposed the vulnerabilities of the traditional depth. It became evident that relying solely on old standards was no longer feasible.

Technological Advancements: The Rise of Deeper Posts

Enter the era of technological advancements. With the advent of better materials and tools, the depth limitations began to fade. While timber posts still face constraints due to auger depths, steel posts emerged as game-changers. Unlike timber, steel posts can be driven straight into the ground to virtually any required depth. This flexibility not only expanded design possibilities but also enhanced durability.

Flexibility at the Top: The Strength of Steel

One of the standout benefits of deeper steel posts lies in their inherent strength. These posts can flex at their tops, providing a dynamic response to external pressures and sudden shock loads. This flexibility ensures resilience against unexpected forces, making them a preferred choice for many modern applications.

Conclusion: Embracing Depth for Durability

In summary, the question of how deep a strainer post should be has evolved significantly over time. While traditional methods and limitations once dictated standards, technological advancements have expanded horizons. Today, steel posts offer unmatched flexibility and strength, allowing for deeper installations of two metres or more that prioritise durability. As we continue to innovate and refine our approaches, one rule in fencing remains clear: depth matters. With the right modern materials and methods, like the Fenceline diagonal stay system, we can achieve unparalleled stability and longevity in fences, no matter their purpose.