| STAGE 4: VALIDATION PART ONE
As the model's framework progressed, elements
of the design that were not present in the original drawings needed
clarification, and the three-dimensional model to be checked for
inconsistencies and omissions. In practice, due to the detailed
briefing that took place between the researcher and model making
team during the planning stage, these changes were few in number
and easily implemented.
The main alteration made to the preliminary furnace model was
to reflect the structure as extended by Huntsman shortly after
1767, rather than the idealised symmetry of Geisler's drawings.
This meant that the self-contained logic of the original six-hole
furnace should still be legible in the window and door layout,
and the four-hole addition treated as an extension of this logic.
Smaller modifications to the draft model included the addition
of typical corbelling details to the brickwork chimneys and the
modification of roof ridge details to reflect the structural role
of the stacks within the rear wall. Some of the proposed alterations
were described in sketch form by the researcher and subsequently
implemented by the model making team, after which the CAD model
was used as a common means of validation.
Finally, the relationship between the building and its yard was
addressed by reference to a physical contour model of the site
derived from a number of early site plans, which enabled the number
of steps into the furnace building and the depth of its cellar
openings to be determined.
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