| 310 - 319 : SECONDARY ELEMENTS TO WALLS | ||
|---|---|---|
| 310 | Secondary Elemants to Ext. Walls (Grouped) | |
| 311 | ||
| 312 | ||
| 313 | Window / Door openings & parts to fill them | |
| 314 | Window openings and windwos | |
| 315 | Doorways, entrances, exits and doors | |
| 316 | ||
| 317 | Hatch openings and hatches to fill them | |
| 318 | Others e.g. barred, louvred openings | |
| 319 | Parts and accessories | |