steel profile
W21x8.25x55
Dimensions and technical properties from the source catalogue are shown below.
- Catalogue
- Nippon W
- Standard
- ASTM A6/A6M
- Source publication
- Nippon Steel Structural Shapes
Dimensions, weight and technical properties
| Property | Value | Unit |
|---|---|---|
| h | 528.3 | mm |
| b | 208.8 | mm |
| t_w | 9.53 | mm |
| t_f | 13.26 | mm |
| r_1 | 13.0 | mm |
| g | 81.85 | kg/m |
| A | 10450.0 | mm² |
| I_x | 476.00 | 10⁶ mm⁴ |
| I_y | 20.20 | 10⁶ mm⁴ |
| i_x | 214.0 | mm |
| i_y | 43.90 | mm |
| W_el,x | 1800 | 10³ mm³ |
| W_el,y | 193 | 10³ mm³ |
| W_pl,x | 2060 | 10³ mm³ |
| W_pl,y | 301 | 10³ mm³ |
| I_t | 416.2314256 | 10³ mm⁴ |
| h | 20.80 | in |
| b | 8.220 | in |
| t_w | 0.375 | in |
| t_f | 0.522 | in |
| r_1 | 0.512 | in |
| g | 55 | lb/ft |
| A | 16.2 | in² |
| I_x | 1140 | in⁴ |
| I_y | 48.4 | in⁴ |
| i_x | 8.41 | in |
| i_y | 1.73 | in |
| W_el,x | 110 | in³ |
| W_el,y | 11.8 | in³ |
| W_pl,x | 126 | in³ |
| W_pl,y | 18.4 | in³ |
| I_t | 1 | in⁴ |
| d | 18.7 mm [PDF] | |
| 7.87 | ||
| 50.0 | ||
| u | 0.865 | |
| H | 4,980 in⁶ [PDF] | |
| nS | ||
| nS | ||
| C | ||
| C | ||
| c1 | ||
| c1 | ||
| c1 | ||
| c1 |
Source notes and corrections
Source H unit scale is unresolved; not a normalized warping constant.
Source d, ratios, u, x and classifications are retained for reference only, never used for substitution.
Page 32 repeats inconsistent d and slenderness values in 39 rows; no guessed corrections.
Imperial d is labelled mm in the PDF; no inferred unit correction.
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