Double arm bracket octagonal pole

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MOQ : 10 Pieces

Double arm bracket octagonal pole Trade Information

Minimum Order Quantity
10 Pieces

Payment Terms
Cash in Advance (CID)

Delivery Time
14 Days

Main Domestic Market
All India

About Double arm bracket octagonal pole

A double arm octagonal pole specification defines the precise engineering, physical dimensions, and electrical criteria for a tapered, 8-sided steel column supporting two facing light fixtures. These poles are universally specified for major highway medians, dual-carriageway intersections, urban main roads, and commercial parking perimeters.

. Material & Structural Specifications

Steel Material: Fabricated from high-tensile structural steel sheets conforming to ASTM A572 Grade 50, S355JO, or IS 2062 E250/E350.
Pole Geometry: Continuously tapered octagonal (8-sided) cross-section formed via high-precision CNC bending machines.
Welding Standards: A single, continuous longitudinal seam weld executed using automated Submerged Arc Welding (SAW), adhering strictly to AWS D1.1 or IS 9595.
Anti-Corrosion Coating: The complete assembly undergoes a multi-tank pickling process followed by hot-dip galvanization inside and out per ISO 1461 or ASTM A123.
Coating Thickness: Minimum average thickness of 65 to 85 microns (depending on steel sheet gauge), providing a rust-free service life exceeding 25 years.

2. Standard Dimensional Profiles

The table below outlines standard industrial dimensions for typical outdoor applications. Dimensions vary depending on target wind speed and overall load criteria:

Nominal Height (H)	Top Diameter (\(D_{t}\))	Bottom Diameter (\(D_{b}\))	Sheet Thickness	Base Plate Dimensions	Anchor Bolt Size
6 Meters	70 mm	130 mm	3 mm	200 200 12 mm	4 M16 450 mm
8 Meters	75 mm	135 mm	3 mm	225 225 16 mm	4 M20 600 mm
9 Meters	75 mm	150 mm	3 mm or 4 mm	260 260 16 mm	4 M24 700 mm
10 Meters	80 mm	165 mm	4 mm	275 275 20 mm	4 M24 750 mm
12 Meters	90 mm	200 mm	4 mm or 5 mm	320 320 20 mm	4 M24 900 mm

3. Double Arm Bracket Details

Bracket Profile: Fabricated from ERW galvanized steel tubes matching ASTM A53 or IS 1239 (Part 1).
Arm Configuration: Double projection arms configured either back-to-back (180 orientation for road medians) or at a 90 right angle for perimeter corners.
Outreach Length: Standard horizontal outreach ranges from 0.5 meters to 2.0 meters depending on road offset requirements.
Tilt Angle: Fixed up-tilt angle engineered at 5 to 15 to optimize light distribution and control glare.
Fixing Mechanism: Slip-on or flange-mounted overhead attachment point secured with high-tensile, stainless steel A2-70 / SS304 anti-vibration locking bolts.

4. Electrical & Base Compartment Features

Service Door: Flush-fitting, weather-resistant, and vandal-proof integrated door located approximately 500 mm above the ground line.
Internal Gear Tray: Removable bakelite or galvanized steel mounting plate inside the door compartment to secure the Loop-in / Loop-out Connectors, MCBs, and terminal blocks.
Cable Entry: Generous 50 mm 150 mm cable entry slot routed directly through the center of the welded base plate.
Earthing: A dedicated, zinc-plated M8 / M10 earthing stud welded internally inside the service door zone for safe lightning protection loops.

5. Environmental & Loading Compliance

Wind Speed Design: Engineered to safely withstand continuous wind pressures from 130 km/h up to 180 km/h (with variable gust factors calculated per region).
Deflection Threshold: Maximum lateral elastic deflection under peak design wind loads limited to 4% of the overall pole height.
Welded Base Plate: Rigid hot-rolled steel base ring plate reinforced with welded triangle gussets/stiffeners to prevent shearing at the anchor boundary.