ABSTRACT
A1 requires that the building, in this case any loadbearing internal walls, must be constructed so that the loads are sustained and transmitted to the ground safely; B2 states that the internal linings, in this case the wall surfaces, must resist the spread of flame over their surface and if ignited have a rate of heat release which is reasonable in the circumstances; B3 has two requirements in relation to an internal wall: firstly, that in the event of a fire its stability will be maintained for a reasonable period and, secondly, that if it separates two or more buildings, i.e. semi-detached or terrace houses, flats or maisonettes, it must be designed and constructed to resist the spread of fire between the buildings; E1 is concerned with any wall that separates a dwelling from another dwelling or that separates a habitable room or kitchen within a dwelling from another part of the same building not used exclusively as part of the dwelling and states that it must resist the passage of airborne sound; L1 calls for the conservation of fuel and power, in this connection it applies to any wall between a dwelling and an unheated space such as a garage; N1 requires that any glazing with which people are likely to come into contact while in passage about the building will either, if broken, do so in a way which is not likely to cause injury or resist impact without breaking or be protected from impact.
