Acrow Prop User Manual Acrow prop is a robust, adjustable steel support post typically used for temporary vertical load-bearing. Acrow props consist of two high-quality galvanized steel tubes—an inner tube and an outer tube—that telescope within each other. The inner tube features a top plate and the outer tube a base plate, creating flat, stable bearing surfaces at both ends. The outer tube is equipped with a pin and a collar handle, allowing the inner tube to be locked in place and the prop to be adjusted precisely to the required height. Known for their durability, safety, and ease of use—they can be easily installed by a single person—Acrow props are widely used in construction projects.