Product Summary

Longze Heavy-Duty Steel Angle Cross Arms are designed to provide robust structural support for insulators and conductors on power distribution and transmission lines. Manufactured in

Yongnian, China, our crossarms are fabricated from high-strength structural steel and hot-dip galvanized to withstand extreme environmental stress.

• ✔ Standard Compliance: ASTM A123, ISO 1461, and local utility specifications.

•  

• ✔ High-Load Stability: Engineered to handle the tension of high-voltage cables under wind and ice loading.

•  

• ✔ Precision Punching: All holes are CNC-punched to ensure 100% alignment with pole hardware and insulators.

• Material: Q235B, Q355B, ASTM A36, ASTM A572 Grade 50.

•  

• Angle Sizes: 40x40x4mm to 150x150x12mm.

•  

• Length: 600mm to 3500mm (Custom lengths available).

•  

• Surface Finish: Hot Dip Galvanized (HDG), thickness ≥86μm.

Mechanical Properties & Material Standards

• Matching the steel grade to the structural requirements of the transmission line.

• Material Grade	Yield Strength	Tensile Strength	Elongation	Aplicativo
  Q235B (A36)	235 MPa	370 - 500 MPa	≥ 25%	Distribution Lines
  Q355B (A572)	355 MPa	470 - 630 MPa	≥ 21%	Transmission Towers
  High-Tensile	420 MPa	520 - 680 MPa	≥ 19%	Heavy-Duty Bracing

Standard Cross Arm Dimensions

• Common angle steel configurations for standard utility pole mounting.

• Angle Size (mm)	Length (mm)	Hole Diameter	Hole Spacing	Max Load (kN)
  50x50x5	1200 - 1800	18 - 22 mm	Per Drawing	15 - 25 kN
  63x63x6	1500 - 2400	18 - 22 mm	Per Drawing	25 - 40 kN
  75x75x8	1800 - 3000	22 - 26 mm	Per Drawing	40 - 65 kN
  100x100x10	2400 - 3500	22 - 26 mm	Per Drawing	65 - 100 kN

 

Galvanizing & Corrosion Resistance

• Ensuring 30+ years of service life in corrosive environments.

• Ambiente	HDG Standard	Zinc Thickness	Service Life
  Rural	ISO 1461	70 - 80 μm	50+ Years
  Industrial	ASTM A123	≥ 86 μm	40+ Years
  Coastal	Marine Grade	100 - 120 μm	25+ Years

Avoid Pitfalls:

• Sharp Edge Deburring: We prevent corona discharge and cable damage by ensuring all punched holes and cut ends are professionally deburred and smoothed.

•  

• Zinc Clogging Control: Many suppliers leave zinc buildup in the holes. Longze ensures every hole is cleaned and gauged after galvanizing for immediate onsite assembly.

•  

• Warping Prevention: We use specialized cooling jigs to maintain the linearity of long crossarms (up to 3.5m) during the high-temperature galvanizing process.

•  

Perfect Fit Assembly:

• Universal Mounting: Holes are punched to match standard U-bolts, eye bolts, and insulator pins.

•  

• Complete Hardware Kits: Available as a set with Stay Rods, Parafusos em U, e Insulator Fittings for a one-stop solution.

•  

Quality Control & Logistics:

• ISO 9001 Certified: 5-step QC including steel chemical analysis and HDG thickness testing.

•  

• Sea-Worthy Packaging: Bundled with heavy-duty steel strapping and protected by edge guards on Fumigation-Free Pallets.

• Q: Can you manufacture to our specific utility drawings? A: Yes, we specialize in OEM production and can customize lengths and hole patterns for any power grid project.

• Q: What is the lead time for a 20GP container of crossarms? A: Production typically takes 15 to 20 days from our Yongnian facility, including fabrication and galvanizing.

• Email:eric@lzfastener.com  What'sApp:+86 15350500528 WeChat:+86 18830006928 or 15350500528