After the removal of the semi-destroyed wooden roof and the installation of temporary working platforms, post-tensioning wire ropes were installed to temporarily tie the detached walls. Reinforced concrete wall ties (chainage) were constructed on top of the interior walls. Temporary tie rods, tightened on the chainage, were used to pull back the exterior masonry walls via controlled force exertion with torque wrench. After the restoration of the walls, steel nail anchors were installed on the corners of the walls throughout the full height of the building. Grout injections were applied on the masonry walls and the temporary tie rods were substituted by permanent ones.
The process for restoring the walls back into the vertical planes was carried out gradually while monitoring the behavior of the walls for any potential failure. The verticality of the detached walls was restored in a percentage > 90%.