Crossarms can be classified based on the material used in their construction and the application for which they are intended. Material Based: Wood Crossarms: These are the traditional and most common type of crossarm, favored for their cost-effectiveness and ease of installation. Steel Crossarms: These are durable and robust, offering better load-bearing capacity and corrosion resistance than wood. However, they are heavier and more expensive. Composite Crossarms: These are made of fiber-reinforced polymers (FRP) or similar materials. They are lightweight, extremely durable, and resistant to weather and environmental conditions. They're more expensive but have longer service life. Application Based: Distribution Crossarms: These are used in lower voltage applications (less than 69kV). They typically hold one to three insulators, corresponding to the phase conductors. Transmission Crossarms: These are used in higher voltage applications (more than 69kV). They are larger and sturdier, designed to support multiple conductors. Other variations might include single-phase, double crossarm, or even multi-tiered configurations, depending on specific utility standards or project requirements. Each type of crossarm has its pros and cons, and the selection depends on factors such as budget, load requirements, environmental conditions, and lifespan expectations.