🏗️ ACI 318 (Average Precompression 125-250 PSI, Load Balancing 65-80% Dead Load)

PT Flat Plate Slab Precompression Calculator

Size uniform and banded post-tensioned tendon layouts for two-way flat plate parking garage and commercial tower slabs under ACI 318: calculate average precompression stress (P/A maintaining mandatory 125 to 250 PSI to eliminate cracking and water leakage) and upward parabolic load balancing force (neutralizing 65% to 80% of self-weight dead load), and structural concrete margins.

1. Project & Operating Inputs

Post-Tensioned Slab Area (Square Feet e.g. 45,000 Sq Ft Deck)

Slab Thickness (Inches e.g. 8.0" Two-Way Concrete Flat Plate)

Customer Bid Price for Supplied, Formed & Poured PT Slab ($ / Sq Ft)

5000 PSI Concrete, Unbonded Tendons, Mild Top/Bottom Rebar & Crew ($ / Sq Ft)

2. Financial Breakdown & Yield

ACI 318 PT LOAD BALANCING

Turnkey PT Slab Structure Profit

Structural Concrete Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost