Component, sub-component and assembly drawings
reason why the methods adopted for any other new
building and the conditions relating to their use should
not apply.
Where information needs to be given about work to
existing structures, two additional aspects need
consideration which are not present in entirely new
work. One is the question of demolitions, particularly
demolitions within a structure. The other is the question
of repairing and making good.
Whenever any demolition of existing structures is
involved, no matter how modest, it is preferable to show
it on a separate drawing—to regard it, in fact, as one
more element in the elementalised set. The expression
‘demolitions’ is to be interpreted widely in this
connection, including such items as forming an opening
in an existing wall as well as more major demolitions
involving entire sections of the building. The correct way
to deal with an opening to be cut in an existing brick wall
to take a new door and frame is shown in 3.25. The3.24 The openings schedule shown in 3.21extended to give information about ironmongery sets