Request A Quote 
4M Stepped Round Light Pole Q235B Steel 2mm Wall Manufacturer
| Diameters | Top: Ø89mm / Bottom: Ø114mm |
| Wall Thickness | 2.0mm (Up to 3.0mm Optional) |
| Flange Plate | 230 x 230 x 8mm |
Talk to Our Engineer Now 1. Expanded Top Tenon for Heavier Payloads
At 4 meters, poles are frequently tasked with carrying larger post-top lanterns or dual-bracket fixtures. To prevent the “whipping effect” at the top of the pole under wind loads, the upper shaft diameter is expanded to Ø89mm. Fabricated from Q235B carbon steel with a 2.0mm to 3.0mm wall thickness, this stepped tubular design significantly increases the section modulus compared to straight pipes, ensuring structural rigidity.
2. Upgraded 230mm Flange & M16 Anchors
The increased 4-meter elevation generates higher overturning moments at the base. To safely transfer these shear forces into the concrete footing, the foundation utilizes a wider 230x230mm square flange plate (8mm thick). The anchoring kit is also upgraded to feature four heavy-duty M16 foundation bolts with a 450mm embedment depth, guaranteeing long-term plumbness even in soft soil conditions.
3. Secure Service Door & Internal Grounding
Designed for immediate municipal grid integration, the lower Ø114mm steel shaft incorporates a precision-cut flush access door. This compartment houses standard terminal blocks and MCBs safely away from weather and vandalism. An internal M8/M10 grounding lug is welded directly inside the cavity, ensuring strict compliance with local earth bonding codes to eliminate electrical shock hazards in public areas.
4. HDG (≥85μm) & Architectural Powder Coating
To achieve a maintenance-free lifecycle exceeding 20 years, the steel mast is completely submerged in molten zinc (Hot Dipped Galvanizing), creating a metallurgical bond of ≥85μm. This is followed by a heat-cured architectural powder coating (≥60μm). This dual-layer system chemically seals the structure against road salt, moisture, and extreme UV degradation.
| Model Reference | DL01-A01A03-002 |
| Pole Height | 4M (Approx. 13.12FT) |
| Structural Material | Q235B Carbon Steel |
| Cross-Section Geometry | Stepped Round Tubular |
| Top Shaft Diameter | Ø89mm (Expanded for Stability) |
| Bottom Shaft Diameter | Ø114mm |
| Structural Wall Thickness | 2.0mm (Up to 3.0mm Optional) |
| Base Flange Dimensions | 230 * 230 * 8mm |
| Anchor Bolt Spec | 4 Pieces – M16 (H450mm) |
| Electrical Maintenance | Flush Access Door with Internal Grounding Lug |
| Galvanizing Standard | HDG, Zinc Coating ≥ 85μm (IEC/IECEE Compliant) |
| Powder Coating | ≥ 60μm Thickness (Custom RAL Colors Available) |
Residential & Municipal Applications for 4M Stepped Poles
Operating at a 4-meter (13ft) height, this stepped tubular column strikes the perfect balance between broad area lighting and human-scale aesthetics. It is the go-to standard for low-speed residential roads and commercial walkways.
Residential Subdivisions & Estates
Illumination Strategy: A 4-meter elevation allows LED post-top fixtures to cast a wider horizontal footprint over neighborhood streets while strictly controlling “light trespass”—preventing unwanted glare from spilling into second-story residential windows.
Structural Benefit: The upgraded Ø89mm top tenon safely supports heavier, decorative architectural lanterns. The 450mm deep M16 foundation bolts ensure the pole remains perfectly plumb even in soft, landscaped soil environments.
Commercial Plazas & Walkways
Illumination Strategy: Retail courtyards and pedestrian boulevards utilize 4M poles to elevate the light source above the crowd canopy, providing excellent facial recognition and security camera visibility.
Structural Benefit: The stepped round aesthetic provides a clean, unobtrusive visual profile. The flush access door protects electrical components from vandalism, and the dual-layer HDG/powder-coated finish prevents rust stains from bleeding onto expensive commercial paving stones.
Municipal Parks & Bikeways
Illumination Strategy: Public parks require durable infrastructure that safely illuminates active multi-use trails without disrupting natural wildlife habitats with excessive high-mast lighting.
Structural Benefit: The Q235B steel structure is resilient against minor low-speed impacts from maintenance equipment or bicycles. The strictly enforced ≥85μm zinc coating guarantees the pole will not rust despite constant exposure to lawn sprinkler systems and heavy rainfall.
