UNP (U-channel) is a hot-rolled U-shaped steel profile used for beams, frames, and machine bases. When estimating materials, the figure you need is almost always the same: what does UNP weigh per metre and per length?
How to read UNP sizes
UNP size is usually named by its web height, e.g. UNP 100 = 100 mm tall. The full spec includes flange width and web thickness, e.g. 100 × 50 × 5 mm. For the same height, a thicker profile is heavier — check the kg/m column.
UNP weight table (popular sizes)
| Size | Dimensions (mm) | Weight (kg/m) | Weight / 6 m (kg) |
|---|---|---|---|
| UNP 50 | 50 × 38 × 5 | 5.59 | 33.5 |
| UNP 65 | 65 × 42 × 5.5 | 7.09 | 42.5 |
| UNP 75 | 75 × 40 × 5 | 6.92 | 41.5 |
| UNP 80 | 80 × 45 × 6 | 8.34 | 50.0 |
| UNP 100 | 100 × 50 × 5 | 9.36 | 56.2 |
| UNP 120 | 120 × 55 × 7 | 13.4 | 80.4 |
| UNP 125 | 125 × 65 × 6 | 13.4 | 80.4 |
| UNP 150 | 150 × 75 × 6.5 | 18.6 | 112 |
| UNP 160 | 160 × 65 × 7.5 | 18.8 | 113 |
| UNP 180 | 180 × 70 × 8 | 21.4 | 128 |
| UNP 200 | 200 × 80 × 7.5 | 24.6 | 148 |
The weights above are theoretical values based on the JIS G3192 standard at a steel density of 7.85 g/cm³. Market UNP profiles can vary slightly by standard — always confirm the dimensions. See the UNP channel page.
Tips for estimating
- Total the length of each size from the drawings, then multiply by kg/m.
- Use the 6 m standard length to work out bar count.
- Confirm the grade — usually SS400 / SNI; compare price per kg.
Need a UNP price today?
Marselus Steel keeps UNP in ready stock at our Tipar Cakung warehouse, North Jakarta. See what drives the UNP price or contact our team on WhatsApp for the latest quote.
