This British Standard gives recommendations for the design of joints
and the use of jointing products in building construction. Following an
analysis of joint functions and of the performance of the parts to be
joined, joints are classified in this standard on the basis of the
movements and inaccuracies they have to accommodate. Mechanisms
by which joints operate are identified and recommendations are made
on the use of sealants and gaskets. Some emphasis is placed on weather
resistance of joints in the external envelope of buildings.
The code does not present guidance in the form of a catalogue of proven
joint designs, because the extent to which a design is appropriate to a
particular use depends on circumstances specific to the building, e.g. its
exposure, desired performance, durability and costs. The code
therefore draws attention to matters that need consideration, in order
that solutions may be developed that are appropriate.
The code does not cover:
a) rigidly connected joints (except type 1 joints, see 4.6.4.1);
b) joints within components normally made in a factory, such as
those around opening lights in windows;
c) the load-bearing functions of structural joints;
d) glazing (see BS 6262);
e) joints in service pipes and ducts and their connections to
appliances;
f) methods of test for joints or for jointing products.
All figures in this standard showing detailed joint designs illustrate
principles in a recognizable context and are not production drawings of
proven and universally applicable joints.