WORKING DRAWINGS HANDBOOK, Fourth Edition

Working Drawings Handbook

component drawing of the doorset of which it will

form part.

The only pieces of information it carries which are not

readily obtainable from other sources in fact, are the

height of the window sill, the height of the parapet, the

relative floor levels and the thickness of the floor

construction. Each of these items of information would

be conveyed just as effectively if the section were

confined to the narrow strip running through the external

walls (2.20).

On a large project it is arguable that one such general

section is useful to the contractor in describing generally

the type of building upon which he is embarking. If

provided, its purpose should be limited to this and the

drawing regarded (and coded) solely as an information

drawing.

Since the number of potentially different wall sections

will be limited, the vast number of separate cross-

sectional cuts through the building at first envisaged is

reduced to manageable proportions. Such strip sections

may also be used as a reference point for the detailed

construction information which needs to be given about

window head, window sill, parapet, footings and the

junctions of floors with walls, and as such they may be

regarded as forming part of the general arrangement

information for the project.

There is little point in attempting to use the strip sections

in themselves to convey this detailed information unless

the building is so small, or so simple in its design, that a

few such sections tell all that needs to be conveyed about

the construction. In most instances the scale of the

section and the number of times it will change around the

building, will make it more sensible to treat the general

arrangement section in almost diagrammatic terms.

Note that the floor levels are given and that the vertical

dimensions (for example, to window sills) are given from

2.20 Sectional cut confined to perimeter of the
building