The general arrangement drawing
Roof plans
Roofs—particularly if they are flat roofs—are essentially
just another floor and it might be thought pedantic to
introduce separate codes for them. Admittedly quantity
surveyors and others concerned with elemental cost
analysis require the distinction, but drawing codes do
not always help here. Is (2.11) a roof plan of the factory,
for example, or is it a floor plan of the tank room?It should be treated as a floor plan and coded accordingly
as ‘level number.. .’. This method of referring to all plans
as ‘levels’ has the inbuilt (and on a very large project, the
important) advantage that every plan level lies in a
numerical sequence and that in consequence (if care is
taken), general arrangement plans of any one level, no
matter what their elemental subject, will possess the
same number. The elementalised general arrangement
plans of level 3, for example, would be numbered:2.9 Sprinkler layout at ceiling level
2.10 Architect’s general arrangement drawing of
the ceiling finishes provides coordinating layout for
everyone involved
It should be noted here how much easier this
correlation becomes with the use of CAD, where all
the facets of information shown may be simply
combined into one drawing file, as well as existing in
their own right.
G(2-) 003
G(3-) 003
G(42) 003
G(43) 003
G(45) 003, etc.On a large project this is of immense practical advantage
to users of the drawing package because it offers them
two ready sortations of the information. It is only
necessary to assemble all the G(43) drawings, for
example, to have the complete general arrangement
information on floor finishes for the entire project.
Assembling all general arrangement drawings whose
sequential number is 003, on the other hand, provides
every elementalised general arrangement plan for level 3.It should be noted that in CAD, levels are effectively
treated as horizontal sections. In fact, some automated
CAD programs that generate plans, elevations and
sections automatically from the ‘model’ can onlywork in
this way.