Cross arm braces connect crossarms to utility poles using bolts and nuts, typically installed in pairs to prevent rotation or bending under load in power transmission and distribution systems. Manufactured primarily from carbon steel, they are hot-dip galvanized according to ISO 1461 or ASTM A123 standards to resist corrosion from moisture and chemical exposure. Some variants use Apitong wood with preservative treatments or fiberglass with UV-resistant coatings for outdoor durability.
Standard specifications include lengths from 20 to 36 inches (common sizes: 20, 26, 28, and 32 inches) with 1/4 inch thickness. Each end features mounting holes—typically 7/16 inch for crossarm attachment and 9/16 inch for pole connection—with hole centers positioned 1 inch from rounded ends. Ultimate tensile strength ranges from 410 N/mm² to 560 N/mm², enabling the braces to handle significant stress without failure.
Installation involves mounting braces in pairs in a V-type configuration on the crossarm side and pole face. After drilling holes at marked points, bolts pass through the brace holes and secure with nuts, often using jam nuts or lock washers for stability under dynamic conditions. Compatible fittings include U-bolts, pigtail bolts, and double arming bolts made from galvanized steel or aluminum.
Trust RaxPower as Your Cross Arm Brace Wholesaler with Over 21 Years of Expertise
At RaxPower, we not only supply industry-standard components but also provide tailored solutions to meet your project requirements. Our Cross arm Braces are engineered to strengthen crossarms and provide stability in power transmission and distribution lines, typically installed in pairs for optimal support.
These braces are made from high-strength carbon steel, hot-dip galvanized for corrosion resistance. Key specifications include:
- Lengths: 20”, 26”, 28”, or 32”
- Thickness: 1/4”
- Hole sizes: 9/16” and 7/16” for secure bolting
The ultimate tensile strength ranges from 410N/mm² to 560N/mm², ensuring reliability under load.
With over 21 years of expertise in OEM/ODM services, we leverage advanced manufacturing processes like hot forging and strict quality control to deliver braces with accurate sizing and enhanced durability. Our team of professional engineers and technicians collaborates closely with clients to customize designs, reduce risks, and ensure timely delivery. Customers like project managers in Southeast Asia note, “The dimensional accuracy and surface finish are spot on, saving us rework and hassle.” Trust RaxPower for cross arm braces that put your interests first, backed by proven performance and dedicated support.
| Length (in) | Steel Size (in) | Hole A (in) | Hole B (in) | Hole Center Distance (in) | Ultimate Tensile Strength (N/mm²) | Material | Surface Treatment | Approx Weight (lb) |
|---|---|---|---|---|---|---|---|---|
| 20 | 1 1/4″ x 1/4″ | 9/16″ | 7/16″ | 18 | 410-560 | Carbon Steel | Hot-dip galvanized (ISO 1461 / ASTM A123) | 1.68 |
| 26 | 1 1/4″ x 1/4″ | 9/16″ | 7/16″ | 24 | 410-560 | Carbon Steel | Hot-dip galvanized (ISO 1461 / ASTM A123) | 2.18 |
| 28 | 1 1/4″ x 1/4″ | 9/16″ | 7/16″ | 26 | 410-560 | Carbon Steel | Hot-dip galvanized (ISO 1461 / ASTM A123) | 2.36 |
| 32 | 1 1/4″ x 1/4″ | 9/16″ | 7/16″ | 30 | 410-560 | Carbon Steel | Hot-dip galvanized (ISO 1461 / ASTM A123) | 2.69 |
Frequently Asked Questions (FAQS)
What is a cross arm brace and what is its function?
A cross arm brace is a pole line hardware component that supports and stabilizes electrical crossarms on power poles. Installed in pairs in a V-type configuration, it connects the crossarm to the pole using bolts and nuts through pre-drilled holes, preventing bending or twisting under load and ensuring stability of power distribution systems.
How do your cross arm braces ensure long-term reliability in extreme environments?
Our cross arm braces are constructed from high-strength, single-piece carbon steel with ultimate tensile strengths of 410–560 N/mm², providing resilience against heavy loads and mechanical stress. Hot-dip galvanized to ISO 1461 standards with a mean coating thickness exceeding 85 microns, they resist corrosion, moisture, and chemical degradation. The one-piece design eliminates welding weak points. Rigorously tested to IEC 120 standards and certified by third-party organizations like SGS, they deliver reliable performance under constant vibration, high winds, and corrosive conditions—ideal for railway electrification and coastal power lines.
What are the standard dimensions and specifications available?
Standard lengths include 20, 26, 28, and 32 inches, with 1/4-inch thickness. Each brace features two pre-drilled holes: one with a 9/16-inch diameter and the other with a 7/16-inch diameter, designed for easy bolt-and-nut attachment without requiring welding or jointed sections.
Can cross arm braces be customized for specific project requirements?
Yes, we offer fully customizable cross arm braces through OEM and ODM services. Adjustable lengths, angles, hole configurations, materials, and surface treatments can be engineered to your exact specifications and site conditions. Our 17,000-square-meter facilities with automated machinery and 21+ years of manufacturing expertise accommodate orders of any size—from single samples to bulk quantities—with efficient lead times and consistent quality across large-scale deployments.
Do you provide sample units for evaluation before full orders?
Yes, we offer free samples with a minimum order quantity of one piece. Samples are manufactured using identical processes and quality controls as full production runs, allowing you to verify fit, form, function, and compatibility with your requirements before committing to volume orders.
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