The Alupilar aluminum column formwork system features built-in locking connectors for easy and quick assembly. The locking pins and slide wedges built into the panels also enable quick stripping. Weighing 4 pounds/square foot with a design pressure of 80 kN/square meter, the system is available in square or rectangular column sections from 8x8 to 24x24 inches. There are no loose parts and a birch plywood face results in a high-quality concrete finish. Alsina Forms Co. 847-299-7009.