Structure: Approved Document A

O N L I N E V E R S I O N A Contents PAGE PAGE Use of guidance 3 Construction materials and workmanship 18 Loading and Ground Movement Loading on walls 25 The Requirements A1/2 5 End restraint 25 Guidance 6 Openings, recesses, overhangs and chases 27 Introduction 6 Lateral support by roofs and floors 28 Interruption of lateral support 31 Section 1: Codes, standards and references for all building types 7 Small single-storey non-residential buildings and annexes 31 Introduction 7 References 7 Section 2D: Proportions for masonry chimneys above the roof structure 35 Basis of structural design and loading 7 Height to width relationship 35 Structural work of reinforced, pre-stressed or plain concrete 7 Section 2E: Foundations of plain concrete 36 Structural work of steel 7 Conditions relating to the ground 36 Structural work of composite steel Design provisions 36 and concrete 8 Minimum width of strip foundations 36 Structural work of timber 8 Minimum depth of strip foundations 37 Structural work of masonry 8 Geotechnical work and foundations 8 Section 3: Wall cladding 38 Seismic aspects 8 General 38 Structural work of aluminium 9 Technical approach 38 Ground movement (Requirement A2b) 9 Loading 38 Existing buildings 9 Fixings 38 Further guidance 39 Section 2: Sizes of structural elements for certain residential buildings and other Section 4: Roof covering 40 small buildings of traditional construction 10 Materials 40 General 10 Re-covering of roofs 40 Definitions 10 Disproportionate Collapse Section 2A: Basic requirements for stability 11 The Requirement A3 41 Section 2B: Sizes of certain timber Guidance 42 members in floors and roofs for dwellings. Areas at risk from house longhorn beetle 12 Performance 42 Sizing of members 12 Introduction 42 House longhorn beetle 12 Section 5: Reducing the sensitivity of the building to disproportionate collapse in Section 2C: Thickness of walls in certain the event of an accident 43 small buildings 13 Alternative approach 45 Application 13 Seismic design 45 Wall types 13 The use of this section 13 Standards referred to 46 Conditions relating to the building of which the wall forms part 13 Thickness of walls 14 Conditions relating to the wall 17 Approved Document A Structure O N L I N E V E R S I O N 1