## 1 Introduction  
The construction industry has faced significant economic challenges, leading to a greater rise in construction costs compared to other sectors. In response, prefabrication techniques were developed to improve cost-efficiency through the mass production of standardized components. Elements such as columns, beams, slabs, and wall panels are manufactured under controlled factory conditions and widely used in large-scale projects. This approach supports off-site production, material standardization, and process consistency [1, 2, 3, 4] ([PERSON] and [PERSON], 2004; [PERSON] et al., 2003; [PERSON] et al., 2007; [PERSON] and [PERSON], 2011). Compared to traditional methods, prefabricated systems ensure higher construction quality by using components with uniform dimensions and minimal tolerance for error. Since most operations are carried out in factories, adverse seasonal effects are minimized, and production time is reduced through skilled labor and advanced equipment. Concrete prefabrication is widely adopted in both large- and small-scale construction projects, serving structural, decorative, and infrastructural purposes [5, 6] (Mtech ConsultLimited, 2008; [PERSON] and [PERSON], 2020). A prominent application is the production of energy transmission poles, which are vital for the safe and efficient delivery of electricity from production facilities to end-users. These poles help minimize energy losses, support high-voltage lines, and enhance safety, while contributing to a sustainable and balanced electricity distribution system. From both economic and environmental standpoints, they offer advantages over alternative solutions and are essential for meeting modern energy demands. The existing literature covers a range of materials used in pole design--including steel, concrete, and composites--focusing on their mechanical properties, durability, and cost-effectiveness ([PERSON], 1999; [PERSON], 2017). Studies also investigate performance under static and dynamic loads, maintenance needs, and environmental impacts, including effects on ecosystems and visual aesthetics ([PERSON] et al., 2024). The literature has addressed concerns related to potential impacts on natural habitats and the environmental footprint associated with the placement of these poles ([PERSON], 2009; [PERSON] and [PERSON], 2017). Research has also investigated the use of composite materials in the design and construction of electricity poles to reduce their weight while enhancing durability ([PERSON] et al., 1999; [PERSON] and [PERSON], 2011; [PERSON], 2023). Despite the extensive studies available on the materials utilized in electricity pole design, their environmental effects, and their performance under load, research specifically focused on reinforced concrete electricity poles is notably scarce. While the existing literature predominantly emphasizes steel and composite materials, there remains a deficiency in the comprehensive analyses of the performance of reinforced concrete poles regarding static and dynamic loading, long-term durability, and maintenance requirements. Due to the geometry of electric poles, creating a model is complex and difficult for engineers accustomed to classical designs. In addition, the placement of reinforcement and the spiral continuity of stirrups along the electric pole make it difficult to model with many existing commercial programs. Therefore, this study was carried out within the scope of university-industry collaboration to find the realistic frequency values and vibration patterns of electric poles that a manufacturing company currently faces, causing modeling problems. In addition, the study aims to eliminate this difficulty by examining the effects of geometric and material parameters on modal properties in detail. In addition, due to long-term modeling studies and the lack of technical staff performing modeling, the frequency values of electricity poles can be determined quickly with the estimation model according to different sizes, sections, and materials.