Section C Fire ResistancePart C1 Fire resistance and stabilityPart C2 Compartmentation and separationPart C3 Protection of openingsSpecification C1.1 Fire-resisting constructionSpecification C1.8 Structural tests for lightweight constructionSpecification C1.10 Fire hazard propertiesSpecification C1.11 Performance of external walls in fireSpecification C1.13 Cavity barriers for fire-protected timberSpecification C1.13a Fire-protected timberSpecification C2.5 Smoke-proof walls in health-care and residential care buildingsSpecification C3.4 Fire doors, smoke doors, fire windows and shuttersSpecification C3.15 Penetration of walls, floors and ceilings by services