Western Specialty Contractors Restore Two Structures
Glen Oak Towers is a housing building in Peoria, Ill., that gives preference to seniors, veterans and people with disabilities. Originally constructed in 1954, the 15-story masonry structure and its attached 40-space parking garage were showing signs of deterioration and corrosion of the concrete surfaces, as well as weathering from salts and deicers brought into the garage from outside vehicles. Western Specialty Contractors at the Springfield, Ill., branch recently completed restoration of both structures, as two separate projects.
For the first project, Western crews restored the parking structure, located on the backside of the building. With the garage's main level and its suspended deck completely enclosed, the total floor space per level was approximately 10,000 square feet.
The garage exhibited extensive damage to its concrete decking in the form of spalling and cracking, and corrosion to its structural concrete members. Western crews performed approximately 3,100 square feet of full-depth concrete repairs (30% of the suspended deck), 550 lineal feet of structural joist repairs, 55 lineal feet of structural beam repairs, removal of 1,500 square feet of asphalt topping on the upper level and installation 825 lineal feet of gravity-fed epoxy injection.
Western crews installed shoring to support the concrete areas that were not to be removed during the restoration process. The shoring also acted as the support framework for the form work and false floor that had to be used for fall protection.
In order to keep the garage operable for tenants, Western crews performed the garage repairs in three phases. In the first phase, new concrete was installed using a concrete pump. In the second and third phases, new concrete was placed using a concrete buggy to move material through the garage. Once the concrete repairs were completed, Western crews applied a two-component, fast-cure traffic membrane on the elevated parking level. The garage restoration project was completed in four months.
For the second project, Western crews performed masonry restoration on the building's challenging facade. Crews performed necessary tuck-pointing throughout the building and replaced over 5,000 spalled and broken bricks, which were mainly at the shelf angles. Western crews also installed new weeps along all of the shelf angles to allow water that may have penetrated the wall to drain out. Workers then re-sealed all of the shelf angles with a silicone sealant. Western crews also sealed around all newly installed windows, using a Dow Corning silicone sealant.
Due to the building having a lot of ins and outs, Western crews were required to change the sizes of the swing stages often during the masonry restoration project.
"Access was difficult since there were lower roof areas that were not connected all the way around, so we had to move the stages up and down off the roof levels as we went around the entire building," said Western Springfield, Ill., Branch Manager Scott Haas. "Roof anchors needed to be installed in order to tie back the swing stages properly."