Narrow Parallel Flange Beam is widely used in the construction industry. These are doubly symmetric shapes; generally used as beams whose inside flange surfaces are substantially parallel. Beams shall be designated by nominal depth and nominal flange width and mass of the section in kg/m.
| NP-Beam | Mass M(kg/Mtr) | D (mm) | B (mm) | t (mm) | T (mm) |
| NPB-200X100(H) | 25.090 | 202 | 102 | 6.2 | 9.5 |
| NPB-200X100(L) | 22.360 | 200 | 100 | 5.6 | 8.5 |
| NPB-250X150 | 46.48 | 250 | 150 | 7.6 | 13.2 |
| NPB-300X150 | 49.32 | 300 | 150 | 8 | 12.7 |
| NPB-350X170 | 66.04 | 350 | 170 | 9.2 | 14.7 |
| W8 * 18 | 206.8 | 5.8 | 133.4 | 8.4 | 26.8 |
| NPB-400X180 | 75.66 | 400 | 180 | 9.7 | 15.5 |
| NPB-450X190 | 92.36 | 450 | 190 | 11 | 17.06 |
| NPB-500X200 | 107.31 | 500 | 200 | 12 | 19 |
