361
roof structures

363
Roof coverings

364
Roof cladding

351
ceiling constructions

352
Ceiling coverings

353
Ceiling cladding

341
Load-bearing interior walls

331
Load-bearing exterior walls

333
external supports

334
Exterior doors and windows

335
Exterior wall cladding, exterior

336
Exterior wall cladding, interior

338
Sun protection

339
Exterior walls, miscellaneous

324
Subfloors and Floor Plates

325
Floor coverings

326
Building waterproofing