High rise structures can benefit greatly from the utilization of unbonded post-tensioning. Some of the advantages to a post-tensioned system are greater economy, increased span lengths, thinner framing elements, less long term maintenance and better performance under seismic forces. Because a slab’s thickness can be greatly reduced with the use of a post-tensioning system, less material is used, thusly saving on concrete costs. A secondary benefit to this reduced slab thickness is an overall reduction in building height. This reduction results in fewer exterior building cladding materials needed and an even greater reduction in construction costs. The tendons that are placed in each elevated slab are draped in a profile that is at its lowest point in the center of the span. This tendon profile creates lift throughout the concrete member that results in highly effective load balancing; therefore each member can span further than would be possible with traditional reinforcements. This increased span can facilitate larger open spaces and better architectural utilization of that space. Slab on Ground Barrier Cable