2.1 This section is presented as follows:
Basic requirements for stability.
Sizes of certain timber members in floors and roofs for dwellings.
Areas at risk from house longhorn beetle.
Thickness of masonry walls in certain residential buildings of not more than three storeys, small single-storey non-residential buildings and annexes.
Proportions for masonry chimneys.
Foundations of plain concrete.
2.3The following meanings apply to terms throughout this section:
A wall designed and constructed to afford lateral support to another wall perpendicular to it, support being provided from the base to the top of the wall.
The horizontal distance between the two leaves of a cavity wall.
A wall constructed as a compartment wall to meet the requirements of regulation B3(2).
The load due to the weight of all walls, permanent partitions, floors, roofs and finishes including services, and all other permanent construction.
The load assumed to be produced by the intended occupancy or use, including the weight of movable partitions, distributed, concentrated, impact, inertia and snow loads, but excluding wind loads.
A member which forms an integral part of a wall, in the form of a thickened section at intervals along the wall, so as to afford lateral support to the wall to which it is bonded or securely tied.
A wall or part of a wall which is common to adjoining buildings, and constructed to meet the requirements of regulation B3(2).
The distance between the longitudinal centres of any two adjacent timber members of the same type, measured in the plane of floor, ceiling or roof structure.
The distance measured along the centre line of a member between the centres of any two adjacent bearings or supports.
A wall to which lateral support is afforded by a combination of buttressing walls, piers or chimneys acting in conjunction with floor(s) or roof.
The load due to the effect of wind pressure or suction.
- Diagram 1 Size and proportion of residential buildings of not more than three storeys
- Diagram 2 Size and proportion of non-residential buildings and annexes
- Diagram 3 Determination of wall thickness
- Diagram 4 Parapet walls - height
- Diagram 5 Maximum floor area enclosed by structural walls
- Diagram 6 Fig 1-2 - Map showing wind speeds in m per s for maximum height of buildings
- Diagram 6 Fig 3 - Map showing wind speeds in m per s for maximum height of buildings
- Diagram 7 Max height of buildings
- Diagram 8 Measuring storey and wall heights
- Diagram 9 Declared compressive strength of masonry units
- Diagram 10 Maximum span of floors
- Diagram 11 Differences in ground levels
- Diagram 12 Openings in a buttressing wall
- Diagram 13 Buttressing
- Diagram 14 Sizes of openings and recesses
- Diagram 15 Lateral support by floors
- Diagram 16 Lateral support at roof level
- Diagram 17 Size and location of openings
- Diagram 18 Wall thinckness
- Diagram 19 Lateral restraint at roof level
- Diagram 20 Proportions for masonry chimneys
- Diagram 21 Elevation of stepped foundation
- Diagram 22 Piers and chimneys
- Diagram 23 Foundation dimensions
- Diagram 24 Area at risk of collapse in the event of an accident
- Table 1 Areas at risk from house longhorn beetle
- Table 2 Wall types considered in this section
- Table 3 Minimum thickness of certain external walls, compartment
- Table 4 Imposed loads
- Table 5 Cavity wall ties
- Table 6 Declared compressive strength of masonry units complying with BS EN 771-1 TO -5 (N/mm SQ)
- Table 7 Normalised compressive strength of masonry units of clay and calcium silicate blocks complying with BS EN 771-1 and 2 (N/mm SQ)
- Table 8 Value of Factor 'X' (see Dia 14)
- Table 9 Lateral support for walls
- Table 10 Minimum width of strip footings
- Table 11 Building consequence