Part C1 Fire resistance Part C2 Fire resistance and stability Part C3 Compartmentation and separation Part C4 Protection of openingsSpecification 5 Fire-resisting constructionSpecification 6 Structural tests for lightweight constructionSpecification 7 Fire hazard propertiesSpecification 8 Performance of external walls in fireSpecification 9 Cavity barriers for fire-protected timberSpecification 10 Fire-protected timberSpecification 11 Smoke-proof walls in health-care and residential care buildingsSpecification 12 Fire doors, smoke doors, fire windows and shuttersSpecification 13 Penetration of walls, floors and ceilings by services