If you've ever driven past a residential construction site and noticed cables running across the foundation before concrete was poured, there's a good chance you were looking at a post-tensioned slab-on-grade foundation. Post-tensioned foundations are common here in Texas, especially because of our expansive clay soils, which can shrink and swell as moisture conditions change. In this video, I walk through the 6 basic steps involved in constructing a post-tensioned concrete slab: 1. Site Preparation – Grading, excavation, utility trenches, and soil compaction. 1. Formwork Installation – Creating the shape and boundaries of the foundation. 3. Post-Tension Tendon Installation – Positioning high-strength steel tendons according to the structural drawings. 4. Additional Reinforcement – Installing rebar in areas requiring additional strength. 5. Concrete Placement – Pouring, finishing, and allowing the concrete to gain strength. 6. Post-Tensioning – Using hydraulic jacks to stress the tendons once the concrete reaches the required strength. 💡 Here's something important to understand: Post-tensioning introduces compression into the concrete, helping the foundation resist tensile stresses and control cracking. As you watch, pay attention to how each step relates to the structural drawings. Whether you're interested in estimating, project engineering, field supervision, or quality control, understanding the construction sequence will help you become better at reading plans. Let's discuss! 👇 Have you ever worked on a post-tensioned foundation, or is this your first time learning how one is constructed? And for those of you learning blueprint reading, would you like me to walk through an actual structural foundation plan and show you how to identify the beams, tendons, and reinforcement? Drop your thoughts or questions below. That's what this community is for! – Byron | Learn About Construction