The Channel Base 4×4 is designed specifically for shoring operations. It fits snugly over US 4 X 4 shoring lumber or it’s metric equivalent where it can be anchored with screws or nails. The Channel Base 4×4 has 8 holes large enough to accept a 3” 16 penny nail for securing the base to strongbacks and shoring lumber. Channel Base 4×4 is milled from solid aluminum to ensure a monolithic structure with predictable, superior strength hard coat anodized for protection and longevity. Bases are not cast or welded upon in any way to avoid unpredictable failure points.