Structure: Approved Document A

O N L I N E V E R S I O N A1/2 Section 2: Sizes of structural elements for certain residential buildings and other small buildings of traditional construction General Pier A member which forms an integral part of a wall, in the form of a thickened section at 2.1 This section is presented as follows: intervals along the wall, so as to afford lateral support to the wall to which it is bonded or Section 2A securely tied. Basic requirements for stability. Separating wall A wall or part of a wall which is common to adjoining buildings, and constructed Section 2B to meet the requirements of regulation B3(2). Sizes of certain timber members in floors and Spacing The distance between the longitudinal roofs for dwellings. centres of any two adjacent timber members of Areas at risk from house longhorn beetle. the same type, measured in the plane of floor, ceiling or roof structure. Section 2C Span The distance measured along the centre Thickness of masonry walls in certain residential line of a member between the centres of any two buildings of not more than three storeys, small adjacent bearings or supports. single-storey non-residential buildings and annexes. Supported wall A wall to which lateral support is Section 2D afforded by a combination of buttressing walls, piers or chimneys acting in conjunction with Proportions for masonry chimneys. floor(s) or roof. Section 2E Wind load The load due to the effect of wind Foundations of plain concrete. pressure or suction. 2.2 Section 2A gives general rules which must be observed in following Sections 2B and 2C. Sections 2B to 2E may be used independently of each other. Throughout this section the diagrams are only illustrative and do not show all the details of construction. Definitions 2.3 The following meanings apply to terms throughout this section: Buttressing wall 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. Cavity width The horizontal distance between the two leaves of a cavity wall. Compartment wall A wall constructed as a compartment wall to meet the requirements of regulation B3(2). Dead load The load due to the weight of all walls, permanent partitions, floors, roofs and finishes including services, and all other permanent construction. Imposed load 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. Structure Approved Document A 10 O N L I N E V E R S I O N