Choosing The Correct Diameter For Tapered High Pole Lights

What are the optimal top and bottom diameters for tapered high mast lighting? This question has always been a dilemma for many clients. Regardless of their technical expertise, cost is paramount, and the dimensions of the top and bottom diameters directly impact the overall cost.

For high-mast lights of the same height, this is the main reason for price differences. Many clients simply want to know the price of a high-mast light at a specific height because they are unaware of these details. These quotations contain many untrue statements. A wise high-mast light manufacturer will first ask the customer about details like the type of light source they intend to use, the necessary diameter of the light panel, and the quantity of lights required before hurrying to offer the lowest price. They are unable to offer a precise price until they have a thorough understanding.

For tapered high pole lights of the same height (about 20 meters), the minimum bottom diameter is 500 mm, though some can reach 680 mm. This is a common occurrence. To prevent potentially catastrophic consequences, a large diameter is required if too many light sources are installed. The idea that it might even break in severe winds is not exaggerated.

Therefore, when purchasing such large streetlights, quality should always come before price. In contrast, compromises can be made with small streetlights, which range in size from 2 to 4 meters. Structural flaws could have catastrophic effects on large structures, such as tapered high pole lights that are tens of meters high.

The following are some specific technical requirements for tapered high pole lights:

1. The straightness error of the pole axis shall not exceed 2‰ of the pole length.

2. The pole design shall comply with GBJ 17 Steel Structure Design Code. When carbon structural steel, low-alloy structural steel, or stainless steel is used, the steel properties shall comply with the provisions of GB/T 699, GB/T 700, GB/T 1591, and GB/T1220.

3. The maximum stress of the pole under standard wind pressure shall be less than the material strength design value.

4. The welding quality of the pole shall meet the requirements of GB/T 12469. There shall be no cracks, slag inclusions, weld beads, burn-through, arc craters, or pinholes that affect strength, and no wrinkles or breaks in the weld. The welding quality of stainless steel composite plates shall comply with the relevant provisions of GB/T 13148.

5. For plug-in lamp posts, the plug length should be greater than 1.5 times the diameter of the larger end at the plug. After the post is plugged in, the clearance should not exceed 3mm, and the post length should meet the design requirements.

6. The weld flaw detection requirements for lamp posts should comply with the evaluation standards in GB/T 3323 and GB/T 11345, and a qualified flaw detection report should be provided.

7. The door (or opening) of the lamp post should have reinforcement measures to ensure that its mechanical properties are not lower than the strength when the door (opening) is closed.

Quick Selection Recommendations:

15–20m: Top diameter 240–260mm, bottom diameter 440–480mm, 2 sections

25–30m: Top diameter 260–280mm, bottom diameter 540–660mm, 3 sections

35–40m: Top diameter 280–320mm, bottom diameter 660–720mm, 4 sections

Custom tapered high pole lights are welcome! Phoebus specializes in manufacturing tapered high pole lights of various heights, providing one-stop service from design and production to installation. Depending on the needs of the site, we can alter the lifting system, lamp panel arrangement, wall thickness, height, and diameter. Our products are widely applicable to squares, ports, highways, parks, stadiums, and other locations.