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1. The general urban road monitoring poles are typically constructed with a height of 6 meters and a cross arm of 1 meter. All embedded concrete parts are made of C25 concrete, and the steel reinforcement meets national standards, ensuring resistance to wind loads. The cement used is 425 ordinary Portland cement, and the concrete mix ratio and minimum cement content comply with the requirements outlined in GBJ204-83. This ensures durability and structural integrity under normal conditions.
2. Each monitoring pole must have a reliable grounding system. It is recommended that the grounding wire be directly buried underground rather than running along the pole body, to ensure effective grounding. The grounding resistance should not exceed 4 ohms, providing safety against electrical faults and lightning strikes.
3. The threaded section above the flange of the pre-embedded anchor bolts should be properly protected to avoid damage during installation. According to the installation drawings, the embedded components must be positioned accurately to ensure that the arm's protruding direction is perpendicular to the traffic lane (or as specified by the engineer). The anchor bolts serve as the main reinforcing elements for stability.
4. The surface of the concrete poured for the monitoring pole foundation should be flat, with a deviation of less than 5mm per meter, to maintain the level of the embedded components. The embedded flange should be 20–30 mm below the surrounding ground level, and the reinforcing ribs should be covered with C25 fine stone concrete to prevent water accumulation and ensure long-term performance.
5. When installing the pole, control box, or cable conduits, a hand hole must be installed if the straight length of the conduit exceeds 50 meters or if the conduits at both ends are not at least 100 mm apart. The hand hole dimensions should be 500 mm (length) × 500 mm (width) × 600 mm (depth), with a gravel layer for drainage. The walls of the hand hole should be coated with cement mortar to ensure durability and prevent water seepage.
6. The control box is supplied by the equipment manufacturer according to the required capacity. The outer casing is made from high-quality cold-rolled steel plate with a thickness of at least 1.2 mm. It features a waterproof and anti-theft coating, making it suitable for outdoor use and protecting internal components from environmental damage.
7. Structural steel used in the construction must not contain defects such as cracks, delamination, heavy scaling, or slag inclusions. Any pitting or scratches on the surface should not exceed half the negative tolerance of the steel thickness or 0.5 mm, whichever is smaller, to ensure the material's mechanical properties remain unaffected.
8. The design follows the latest national standards, including "Carbon Structural Steel," "Construction and Acceptance Specifications for Electrical Installation Engineering - Cable Lines," and "Code for Construction and Acceptance of Reinforced Concrete Projects." The structure is designed to withstand a wind load of 23 m/s² and has a service life of 30 years, ensuring long-term reliability and safety.