Properly constructed cast-in-place post­tensioned concrete floors are virtually crack­free and use widely-spaced floor joints (joint spacings of 200 ft or more are common). The use of epoxy-coated reinforcement, encapsulation of post-tensioned reinforcement, low water/cement ratio air-entrained concrete, and concrete sealers in aggressive environments provide floor systems with minimal maintenance costs. Precast floors, particularly "untopped" precast floors, require periodic maintenance repairs of the caulked joints between the precast units. One consulting firm estimated that 30 percent of the caulked joints of precast floors will need to be replaced every three years after the five-year warranty expires. Loss of parking spaces during maintenance work results in loss of parking revenue.

 

 

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