Plan.
A map or representation of a building or machine on a given plane.
A horizontal section at a specified level.
1. In architectural drawing, the term is applied either to a
ground plan, the
orthography, or to a horizontal section at a given hight, say one of floors or stories.
In the
geometrical plan, the parts are represented in their natural proportions.
In the
perspective plan, the lines follow the rules of perspective, reducing the sizes of more distant parts.
Other views are
elevations, end or
side, and
sections; also called
raised plans.
2. In shipbuilding, the term
plan is of more general import, and we have —
a. The
shear-plan, giving the lines of horizontal sections at different hights, as well as the bow and buttock lines, which represent the boundaries of vertical sections in planes parallel to the vertical longitudinal section.
The shear-plan is practically a side elevation or longitudinal view.
b. The
halfbreadth plan is practically a top view of one half of the vessel, divided vertically and longitudinally in the line of its keel.
It is a
plan in the more restricted sense.
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Plan of a cottage. |
c. The
bodyplan is an end elevation, showing the
water-lines,
buttock and bow lines,
diagonal lines, etc. See line.
