Dr. Riyad Abdel Abbas Ali<br /><br />Prestressed concrete ceilings using post-tensioning technology:<br /><br />(POST TENSIONED SLABS)<br />Years ago, a prestressed system using post-tensioning technology was developed, which was used in the construction of bridges and some private facilities. It was developed to include buildings of all types, residential, commercial, and service, *high-rise and medium-rise*. It has become one of the most important construction systems currently in use due to its characteristics and capabilities that other systems were unable to provide<br /><br />- Features of the post<br />Saving construction costs<br />The construction cost decreases by a rate ranging from 15% to 30% depending on the nature of the building for the following reasons:<br />Reducing the amount of rebar by up to 60%.<br />Reducing concrete quantities<br />Allowing large spaces between columns, which reduces their number.<br />Savings on the base/bases due to the light weight of the building and the small number of columns.<br />Reducing labor wages.<br />*Speed of implementation*<br />This is because the system allows the roof supports (forms) to be removed 4 to 5 days after casting.<br />🟠 *Structural durability*🛡<br />Resistant to cracks.<br />Reducing bends caused by loads (Deflection).<br />Reducing the overall building weight.<br />🟠 *Architectural advantages*🏘<br />The ease of architectural design due to the large spaces provided by the lack of columns and the lack of internal beams.<br />