SPIN FIN technology has been extensively tested and proven through an array of projects since 1983, including by the California Department of Transportation in the early 1990s in an effort to shore up as many as 400 bridges weakened by the 6.9-magnitude Loma Prieta Earthquake in 1989. These piles consistently outperform traditional and smooth pipe piles in cyclic, tensile, and compressive load tests. They’re reliable and durable in a wide variety of environmental and operational conditions.