| 280 - 289 : BUILDING FRAMES, OTHER PRIM. ELEMENTS | ||
|---|---|---|
| 280 | Building Frames, other Primary Elements (Grouped) | |
| 281 | ||
| 282 | Column and beam frames | |
| 283 | Colume and slab frames | |
| 284 | ||
| 285 | ||
| 286 | Space frames as building frames | |
| 287 | Other building frames e.g. pin-jointed | |
| 288 | Other types of primary elements e.g. shafts, chimneys | |
| 289 | Parts and accessories | |