Technical articles, worked examples and field notes on post-tension slab design, tendon layout, detailing, stressing, inspection and repair.
Chlorides corrode post tension slab tendons out of sight. How they reach the steel, how to assess the risk on an existing slab, which repairs exist, and how to design against it.
Where anchors sit decides where a post tension slab gets its precompression. Anchorage zones, drape and balanced load, punching shear, and the layout rules we apply in the field.
Drilling into a post tension slab without locating the tendons is never safe. The force in one strand, what ACI 318-19 expects, five mistakes that cut cables, and what to do first.
Is a post tension slab more earthquake-resistant than an RC slab? How each behaves as a diaphragm and at the column, what ACI 318-19 changed, and how seismic category decides.
How to recognize a post-tension cable failure in a post tension slab: blowouts, directional cracks, sagging floors, rust and grease stains, and which signs mean stop and call an engineer now.
Cutting into a post tension slab without a plan can sever a stressed tendon. The five mistakes we see most often, and the checklist that prevents them, for owners and contractors.
Why the gap between a post tension slab and an RC flat plate widens with every floor: thickness, load balancing, punching shear, floor cycles, and when RC still wins.
Three award-winning projects, two in Dallas, show how post-tensioning makes large cantilevers possible. See why deflection governs, how the designs were controlled, and what goes wrong on site.
Embedded sensors can watch a post tension slab from the inside, but each measures one thing. See what strain, maturity, corrosion and acoustic sensors detect, and when monitoring pays off.
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