A typical Park Plaza Post‐Tensioned Parking Structure Demolition Presenter: Michael Lussier, Structural Technologies ‐VSL DYWIDAG Post-Tensioning Systems are known around the world for their superior load-carrying performance, durability and simple design. "Parking Structure with a Post-tensioned Deck," Engineering Journal, American Institute of Steel Construction, Vol. The superstructure consists of post-tensioned slabs with concrete columns. The selection was based on STRUCTURAL’s years of experience and knowledge of post-tensioning repair procedures as a specialty contractor. Originally post-tensioned, two-way slab framing systems were constructed with column and middle strips, similar to those used in conventionally reinforced two-way slabs. into a Post-Tensioned Parking Structure By David A. VanOcker, PE R epairing a distressed 35-year-old, post-tensioned parking structure is a challenging proposition. Before discussing I was involved in the rehabilitation of a large, unbonded, post-tensioned parking structure where the slab tendons were de-stressed, removed and replaced. OUR SERVICES. The number and timing of broken strands I have obtained a few publications from PTI about the topic but my main question doesn't seem to be answered in them. The garage is a six-story, freestanding, post-tensioned structure with approximately 500,000 square feet of parking area. Cast-in-place post-tensioned floor slabs utilizing steel cables to compress the slab after curing by placing the cables or tendons in tension. Post-Tension Parking Garage Repair. Keep in mind, every situation/structure is different. 9. epairing a distressed 35-year-old, post-tensioned parking structure is a challenging proposition. Cast-in-place post-tensioned floor slabs utilizing steel cables to compress the slab after curing by placing the cables or tendons in tension. Post-tensioned concrete is lightweight, durable, and structurally efficient, making it an ideal product for residential buildings, commercial structures, multifamily construction, parking garages, bridges, and more. We recommend using PT for temperature and shrinkage reinforcement. Forming was a combination of vertical and horizontal shoring, with some of the form load carried by bolts hung from the tee flangs. Today post-tensioning is becoming increasingly popular for many different use categories including parking structures, high-rise office and residential, hospitality, and podium slabs for mixed-use projects. Regarding cast-in-place, post-tensioned parking garages, based on the number of post-tensioned structures we have repaired, I'm very reluctant to recommend any such system for parkades, even for the newer extruded sheathed tendons. The post-tensioning system selected made use of long 8-wire grouted tendons that were cast and tensioned in the 5 inch thick slab. At Schaefer, we believe there is no one-size-fits-all solution for parking structure construction. The post-tensioned structure was completed in association with Perkins + Will (Design Architect), WMA (Engineers), V3 (Civil Engineer), and Power Construction (General Contractor). The aging structure showed significant signs of structural degradation as well as the need for architectural improvements. Repair Broken Post-Tensioned Strands. Hydraulic Jack are used to pull the Cables 14. Jim Rogers Bending and flexing creates high tensile forces … Post-tensioned concrete construction is a little different than standard reinforced concrete construction. Post-Tension Parking Garage Repairs. Built in 1964, the Baltimore Garage is a 270,000 SF split level button head post-tensioned garage located in Detroit’s New Center neighborhood. Understanding the technical challenges of repairing post-tensioned cables and the safety issues relating to the structure, the patrons, and the workers when highly tensioned cables are repaired, the owner selected STRUCTURAL to perform the work. ... engineering and solution implementation for the parking structure. VSL systems have a well-earned reputation for their quality, reliability, and durability – and have been used throughout the world since 1956 to build, repair, and strengthen buildings, parking and other special … Whether you call them precast parking garages, parking structures, parking ramps, parkades or car parks, structured parking made of precast concrete is the leading choice for designers in the United States for speed, economy and low life cycle cost. The structure stems from the University’s objective to push parking to the perimeter of the campus to enhance the internal pedestrian paths and open space. ... allowing steel and tendons to extend through the forms while pouring the core structure. Using rebar for shrinkage and temperature reinforcement in parking garage slabs. The use of PT reinforcement in these structures greatly reduces the amount of cracking and possible leakage to the structure and also allows economical long-term construction. Level 1 & 2 Unbonded PT Installer & Inspector, Level 1 & 2 Multistrand & Grouted PT Specialist, Level 1 & 2 Multistrand & Grouted PT Inspector, Copyright 2021 by Post-Tensioning Institute, Level 1 & 2 Unbonded PT Ironworker (Accelerated), PTI DC20.7-01: Design, Construction and Maintenance of Cast-in-Place Post-Tensioned Concrete Parking Structures, PTI C30.1-03: Level 1 Unbonded PT Field Installation, PTI DC20.8-04: Design of Post-Tensioned Slabs Using Unbonded Tendons, PTI M10.4-07: Specification for Seven-Wire Prestressed Steel Strand for Barrier Cable Applications. A thorough evaluation of the existing condition is essential to the safety and stability of the structure PT precompression and load balancing permits thinner slabs and improves durability by reducing slab cracking. 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