With the Temple Square renovation nearing the end of its second year, crews continued to focus on seismic strengthening and lower-level excavations, as well as stone removal and installing additional trusses to the roof of the Salt Lake Temple in the month of October.
Ten photos and information describing each phase of the construction process were provided by The Church of Jesus Christ of Latter-day Saints Thursday in a news release.
What is the ‘jack and bore’ process?
The ‘jack and bore’ process, a key component of the seismic renovation system of the Salt Lake Temple, continues to move forward. Pipes filled with reinforced steel, post-tensioning strands and high-strength concrete are placed in the original foundation. These steel pipes are 3.5 to 4 feet in diameter. Soil is removed from inside the pipes as they are gradually inserted horizontally. Each pipe is 40 feet long, made from two 20-foot-long pieces welded together. So far, five of 92 such pipes have been installed and three have been filled with concrete.
Deep excavation continues
Deep excavation continues on the north side of the temple to prepare for three additional lower levels. These lower floors will include sealing rooms, two baptistries, administrative offices, changing rooms and a tunnel entrance to the temple from the Conference Center parking garage.
The excavation is nearly at the bottom level. The next steps will include pouring concrete slab as a working surface before formwork begins on the lowest floor of the temple addition.
All five rows of walers (horizontal bracing beams) in the large secant wall have now been installed to further reinforce the vertical steel and concrete columns that form the secant wall.
Finials and stones of various sizes continue to be removed from the towers and the upper north and south walls of the temple. Each stone is carefully cataloged and labeled before being taken to a storage place. Each stone will be reinstalled at the very same location it was originally placed. The picture below shows the original black markings used by the early Latter-day Saint builders to label each stone location.
Additional roof trusses have also been installed alongside the original trusses, which will remain in place. All new trusses will brace the upper north and south temple walls as part of the seismic improvements. Workers wear protective suits as they work on the stone removal.
The Church Office Building plaza
Reconstruction work on the Church Office Building plaza is proceeding. New concrete has been laid and waterproofed. An elliptical concrete structure is being built to display flags in the plaza.
Covered in scaffolding
The last photo shows a view of the temple from the 10th floor of the Joseph Smith Memorial Building. On the east side of the temple is a new utility bridge to provide additional power for the vertical drilling work. This drilling will run the length of the walls and towers from top to bottom to further reinforce the building’s stonework.