Post Tensioned Concrete Slab Pour
The 8-Hour Pour: Engineering the Sheats-Goldstein Infinity Court
Construction / Post-Tensioned Concrete / Goldstein ResidenceThe time-lapse above documents an eight-hour continuous concrete pour for the post-tensioned slab at the James F. Goldstein Entertainment Complex—one of the most consequential single construction events in the project's history, executed by Nicholson Architects.
Why Continuous — and Why It Matters
In post-tensioned concrete construction, the pour cannot be interrupted. A monolithic slab must cure as a single, unified solid: any cold joint—a seam where poured concrete meets concrete that has already begun to set—introduces a structural discontinuity that the post-tensioning system cannot bridge. Eight hours, start to finish, no breaks.
Once the concrete reaches its design compressive strength—typically around 3,000 psi—the internal post-tension cables are hydraulically stressed. This process pre-loads the slab, compressing it from the inside out and allowing it to achieve the dramatic cantilevers and thin profiles required for the iconic infinity tennis court that appears to hover over the canyon below.
The pour in progress — a continuous operation from first truck to final screed
Architect: Nicholson Architects
Structural Engineer: Andrew Nasser, Omnispan Corporation
Construction: Ostermann Construction
awaiting for next video!)
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