Post-Tensioned Slab Calculator

Design post-tensioned (PT) concrete floor slabs

Length (ft)

Width (ft)

Thickness (in)

f'c (psi)

Strand Size

Tendon Spacing (ft)

Jacking Stress (% of fpu)

Typical: 75-80%

Superimposed DL (psf)

Live Load (psf)

Tendons (length direction):90

Tendons (width direction):90

Total Tendons:180

Force per Strand:33.05 kips

Total Strand Length:5400 ft

Avg Precompression:46 psi

Outside target range (125-300 psi)

Max Drape:2.50 in

Balanced Load:6.1 psf

Self Weight:100.0 psf

Total Load:250.0 psf

Net Unbalanced:243.9 psf

Friction Loss:7.4%

Effective Force/Strand:30.62 kips

Concrete Volume:22.2 CY

Strand Weight:2835 lbs