TONAL VALUES IN ARCHITECTURAL DRAWINGS
The principal use of tonal values in floor plans is to
emphasize theshape and arrangement of cut elements.
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• Rendering the floor surface in a plan drawing with a
material pattern will give that plane bothatextural
and atonal value. These values can effectively isolate
and providea base for elements that are situated
above thefloor plane.
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• When a plan drawing has several floor levels w its
ithin
field, varying the intensity of the tonal values can help
convey the relative depth of t hefloor planes below the
plan cut. The lower t he floor plane, the darker its value.
• If the space defined in a plan drawing is givenat onal
value along w t he surroundingfield, t hecut elements
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can beleft white or be given a very light value. Be sure,
however, that there is sufficient contrast to emphasize
the dominance of the cut elements. If necessary,,
outline the cut elemen with a heavy line weight. ·
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RENDERING TONAL VALUES / 137