Clause 3.1 General Clause 3.2 Provision of compartment walls and compartment floors Clause 3.3 Fire resistance of elements of structure Clause 3.4 Test of fire resistance Clause 3.5 External wall Clause 3.6 Separating walls Clause 3.7 Compartment walls and compartment floors Clause 3.8 Protected shafts Clause 3.9 Protection of openings Clause 3.10 Exit staircases Clause 3.11 Concealed spaces Clause 3.12 Fire stopping Clause 3.13 Restriction of spread of flame over surfaces of walls and ceilings Clause 3.14 Roofs Clause 3.15 Materials for construction Clause 3.16 Use of plastic material Annex 3A - Notional Periods Of Fire Resistance Annex 3B - Permitted Limits Of Unprotected Areas