HDR (Horizontal Flat Frame for Derivation)
Use: These steel frames are for use in poles for the establishment of overhead power lines of 10KV, 15KV and 30KV.
| Reference | Type | Use | Pole effort (daN) |
| 4.14.HDR 60 | Horizontal Flat | Derivation | |
| 4.14.HDR 80 | Horizontal Flat | Derivation | 400 - 5000 |
| 4.14.HDR 100 | Horizontal Flat | Derivation | 400 - 5000 |
| 4.14.HDR 120 | Horizontal Flat | Derivation | 400 - 5000 |