The Cathedral’s existing vertically bedded brownstone had extensively delaminated and failed, primarily from freeze-thaw cycles. The exterior restoration included replacement of the brownstone for 60 percent of the building including the 190-foot-high north tower. At the time, it was considered the largest brownstone restoration in the Western Hemisphere.
Our scope included in-situ testing of proposed stone anchors; analysis of the structure under construction loading; design of scaffolding support; and design of the north tower steeple reinforcing and hold-down, post-tensioned cables. The interior renovation included reconfiguration of the altar, restoration of the neo-gothic plaster, and structural improvements of the floors. All of this work was coordinated around a crypt located beneath the Cathedral, which houses the coffins of six former Bishops.