TechWall is a precast counterfort retaining wall system consisting of full-height wall facing units secured to a cast-in-place footing. The facing units are each cast with a counterforts on the rear side.

Panels are delivered with rebar dowels protruding from the bottom. The footing is formed, with rebar placed, and the panel dowels are tied in to provide the necessary embedment and development lengths. The cast-in-place footing is then poured, securing the panels in place.

A Variation of a Cantilever Wall

A precast counterfort retaining wall system is a variation of a typical cantilever stem wall. Precast facing units are secured to a cast-in-place or precast footing. Rather than designing the entire length of the facing stem to resist the lateral earth pressure load, the facing units are each cast with one or two counterforts on the rear side. The counterforts work as cantilever beams to resist lateral earth pressure, allowing for a relatively thin wall facing between them. Counterforts also reduce the moment in the footing, allowing for a more efficient and economical footing design. The counterforts, facing, and footing are custom designed for the wall, greatly increasing the material efficiency of the cantilever system.