41×82 C-Section Fully Welded Trailing Arm | Heavy-Duty Bracket Fitting for Solar, Cable Tray & Seismic Support Systems Product Description: This fully welded trailing arm is a heavy-load core fitting purpose-built for 41×82 double-spliced C-section steel support systems. Fabricated from high-strength structural steel with full-penetration continuous welding technology, it delivers exceptional integral rigidity, vibration resistance and shear strength. It is widely deployed