ADVANTAGES / BENEFIS OF POST TENSIONING

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A. SAVINGS IN MATERIAL

• Reduction in concrete structural element dimensions (slabs, beams, columns – 20 to 25%)
• Reduction in reinforcement quantities (55 to 60%)
• Reduced self weight (dead load) reduces reinforcement and concrete in slabs, columns and foundations
• Reduction in total building height (1 floor gained each 20 floors)

B. SAVINGS DURING CONSTRUCTION

• Pour (concreting) cycle of 6 to 7 days (Quicker Construction)
• Reduction in number of formwork (shuttering) sets
• Quick rotation of formwork sets (45 to 50%)
• Earlier removal of formworks
• Reduction in concrete reinforcement, formwork quantities
• Reduction in manpower requirements due to reduction in material requirement

C. STRUCTURAL PERFORMANCE

• Better waterproofing and improved crack control
• High deflection limitation due to concrete shrinkage and creep
• Improvement of durability and concrete behavior
• Increase in free space availability, greater flexibility in floor layouts, and more architectural opportunities

D. LONG TERM PERFORMANCE ADVANTAGES

• Reduction of construction volumes and energy needed for heating, cooling, living spaces
• Overall maintenance costs of structure
• LEED & Green building design and construction

These advantages can result in significant savings in overall costs. There are also some situations where the height of the building is limited, in which the reduced story height has allowed additional stories to be constructed within the building envelope.