09/28/2026
A slip form is a construction method in which concrete is continuously placed into forms that move horizontally or are gradually raised vertically. In civil engineering, slipforming allows the construction of continuous concrete structures such as roads, curbs, bridges, towers, buildings, and dams while reducing the need for separate formwork sections. The picture below shows the AT&T Long Lines relay tower in Indiana, constructed using the slip-form method (Wikipedia).