SGH visited the site to assess the stability and condition of the exterior walls following the fire. Highlights of our work include the following:
Developed shoring and wall removal plans to help the contractor create an opening below an existing window to extract fire debris from the church
Surveyed the exterior limestone and interior brick masonry of the transitional masonry walls and typical window conditions
Evaluated the gutter system and water paths
Performed non-destructive testing to identify locations of metal ties securing the exterior limestone and evaluated their condition
We recommended phased repairs to stabilize and restore the church, and developed order-of-magnitude cost estimates for the Institute to use as they planned and budgeted for the work. We subsequently developed a repair program, including the following:
Stabilization. Replacing displaced and missing stones, repairing damaged interior brick masonry, installing supplemental masonry ties to improve lateral support, repairing spalled and cracked concrete slabs and beams and replacing limestone lintel in the tower.
Repairs to address water infiltration. Replacing the roof and gutter system, improving site drainage at grade, repairing horizontal skyward-facing joints in limestone, restoring/replacing windows and door fenestrations, and replacing sealant joints.
Facade restoration. Repairing damaged limestone, pointing failed mortar joints, and cleaning masonry surfaces.
SGH also reviewed the truss design to locate erection pick points and determine the required capacity for equipment used to pick the truss by the crane.