"It's a miracle the roof hadn't fallen down," says project engineer David Allott of BWB Consulting, referring to the discovery that 10 of the roof's 16 double inverted primary trusses had failed due to water damage. "Both the gutters and downpipes were compromised due to years of neglect, which had led to water ingress and extensive decay," he says.rnThe roof is a timber trussed conical form, supported off an inner cast-iron ring beam and columns and an external masonry wall. The truss system relies on the counterbalancing of the 16 principal trusses, with the pin at the top formed by a circular ring beam.
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