Functions of Lamp Arms, Flanges, and Embedded Parts
Jun 11, 2026
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Double-arm streetlight poles are the primary lighting fixtures on city roads and in industrial parks. The stable operation of the pole depends not only on the streetlight pole itself but also on the coordinated support of various supporting components. Among them, the lamp arm, the flange, and the embedded parts are three core components, which are of great significance to the lighting positioning, fixing, and connecting, and the bearing of foundation weight, respectively. The basis of safe, stable, and long-term operation of streetlights. Phoebus will give a detailed analysis of their functions and value below.

Lamp Arms
Lamp arms are the main lighting part of the double-arm streetlight poles. They are mounted in pairs, symmetrically, on the top of the pole and are the main element that differentiates the single arm street light from the double arm street light. They are mainly made from galvanized steel and formed by bending. They are resistant to corrosion and rust and have a high load-bearing capacity. Their purpose is to increase the lateral range of illumination, to fix the lamps in appropriate positions, to avoid obstruction by the pole, and to give even light coverage of lanes and sidewalks. At the same time, the tilt angle and length of the lamp arm can be adjusted according to the road conditions to adapt to roads of different widths, effectively eliminating blind spots, ensuring nighttime visibility, and balancing the lighting effect and road aesthetics.
Flange
A flange is a connecting accessory that is an important transition part between the main body of the light pole and the foundation. It is a round or square steel plate welded to the bottom of the light pole with many pre-drilled bolt holes. Its primary function is to disperse the pressure from the light pole, thereby spreading the entire weight of the light pole and lamp uniformly over the foundation and preventing stress concentration at the bottom of the light pole, which can cause deformation or fracture. The flange accurately fixes the verticality of the light pole, corrects the installation deviation, effectively resists the impact of strong wind, rain, snow, and other external forces, prevents the light pole from tilting or swaying, and guarantees the stability of the daily operation of the streetlight.
Embedded Components
Embedded components are core components deeply buried inside the foundation. They are made of anchor bolts and reinforcing steel plates and are pre-embedded and fixed during concrete pouring. They are the "invisible foundation" of the streetlight pole, deeply embedded in the ground. They are secured to the bottom flange with bolts, connecting the light pole to the ground foundation. Compared with the directly buried poles, the pre-embedded components greatly enhance the resistance of poles to pull-out and overturning, preventing the streetlights from collapsing at the source and greatly extending their lifespan. It is a fundamental guarantee for the safety of streetlights and their ability to stand up to extreme weather.
The three parts cooperate and fulfill their respective functions from underground fixing and mid-section connection to upper lighting support to ensure the stable, safe, and efficient operation of the double-arm streetlight pole. They are the main components of street lighting engineering construction.
Phoebus is a double-arm streetlight pole manufacturer. We provide high-quality products and services at competitive prices. We specialize in double-arm streetlight poles and a full set of matching accessories, with high-quality materials and standards. We can provide size and style customization according to your specific requirements. We accept all sizes of orders. We have a stable supply and comprehensive after-sales service. We are a reliable choice for engineering procurement, as we sell our products in the domestic and international markets.
