Alley Arm Brace
Our hot-dip galvanized Alley Arm Brace (also called a Side Arm Brace) is not just a component—it’s a certified structural solution. Designed for the demanding conditions of alleyways and roadside poles, it provides critical vertical reinforcement to eliminate crossarm sagging, counteract heavy loads, and ensure long-term structural integrity for your utility infrastructure. We back every project with complimentary engineering analysis to guarantee the correct load rating for your specific site conditions.
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Free Engineering Support
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Heavy-Duty Q235 Steel
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ASTM A123 Hot-Dip Galvanized
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Custom Sizes Available
What Is an Alley Arm Brace?
An Alley Arm Brace (also commonly referred to as a Side Arm Brace) is a structural steel bracket specifically engineered for side-mounted (alley) arm construction on utility poles.
It is typically fabricated from a steel angle iron, forming an L-shaped profile that is installed diagonally between the vertical pole and the horizontal crossarm. This installation creates a rigid triangular support structure.
Its primary engineering function is to provide critical vertical and lateral reinforcement at the pole-crossarm junction. By transferring loads from the crossarm directly into the pole, it prevents downward sagging (deflection) and resists twisting (torsion) caused by conductor weight, ice accumulation, and wind forces.
In essence, it is the essential component that converts a simple cantilevered crossarm into a stable, braced-frame structure, dramatically increasing its load-bearing capacity and longevity in demanding roadside and alleyway installations.
Specifications
1. Design and Performance: This brace is engineered and load-rated to provide reliable support for side-arm construction. Submit your application details (pole class, crossarm size, local wind/ice code) for a free engineering analysis and a certified load rating.
2. Material: carbon steel Q235
3. Process: Laser Cutting, Welding （Fabricated from prime steel angle. Components are precision cut, welded with full-penetration welds, and all edges are deburred for safety and durability.）
4. Corrosion Protection: Hot-dip galvanized to ASTM standards.
– Structural Parts: per ASTM A123.
– Fasteners: per ASTM A153, Class B.
– Coating Mass: Min. average 610 g/m² on structural parts.
5. Finish: Characteristic spangled silver-gray of hot-dip galvanizing.
Powder coating available upon request for specific colors
6. Size for Model: SW-SAB-83
– Effective Support Length (Center to Center): 2,075 mm (81.7″)
– Overall Length of Angle: 2,108 mm (83″)
– Leg Dimensions: 50 mm x 50 mm x 5 mm (2″ x 2″ x 3/16″) Equal Angle
– Mounting Hole Diameter (Pole & Crossarm): 17.5 mm (11/16″)
– Weight: 8.9 kg (19.6 lbs)
Note: We provide a range of standard sizes. All critical dimensions can be customized to your drawings and engineering requirements.
7. Standard Packaging: Secured in export wooden crates or on pallets.
Applications
Alley & Narrow Right-of-Way Reinforcement
Reinforces crossarms in tight spaces like back alleys and congested roadside installations. Prevents misalignment and sagging caused by accidental contact from trucks, lifting equipment, or vegetation management vehicles.High-Capacity Line Support
Provides essential supplemental support for crossarms under heavy mechanical loads. Ideal for arms carrying transformers, switchgear, capacitor banks, or multiple dense conductor bundles, ensuring structural integrity under maximum design conditions.Legacy Line Upgrade & Maintenance
Offers a cost-effective retrofit solution to strengthen existing crossarms that show signs of fatigue, downward deflection (sag), or corrosion-induced weakening. Extends service life and defers full pole or crossarm replacement costs.
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