European UPE (parallel-flange) channels are dimensional equivalents to GB C-profiles (per GB/T 706) for most common sizes, with minor variances within tolerance limits:
Key Size Comparisons:
UPE 100 vs. GB C100x50x5: UPE 100 (depth 100 mm, flange width 55 mm, web thickness 5 mm, weight 8.2 kg/m) vs. GB C100x50x5 (depth 100 mm, flange width 50 mm, web thickness 5 mm, weight 7.37 kg/m). The 5 mm flange width difference is within EN/GB tolerances (±0.8 mm for ≤50 mm), so UPE 100 fits GB-compatible brackets with no modification.
UPE 200 vs. GB C200x75x7: UPE 200 (depth 200 mm, flange width 75 mm, web thickness 7 mm, weight 17.2 kg/m) vs. GB C200x75x7 (depth 200 mm, flange width 75 mm, web thickness 7 mm, weight 17.2 kg/m)-identical dimensions, ensuring direct substitution.
UPE 300 vs. GB C300x90x10: UPE 300 (depth 300 mm, flange width 90 mm, web thickness 10 mm, weight 29.8 kg/m) vs. GB C300x90x10 (depth 300 mm, flange width 90 mm, web thickness 10 mm, weight 29.7 kg/m)-negligible weight difference (0.1 kg/m).
EN 10279 and GB/T 706 share identical tolerances for critical dimensions (depth: ±1.5 mm for 200–300 mm; flange width: ±1.0 mm for 50–100 mm), ensuring UPE channels fit GB connections without adjustments.