L Shape Box apparatus consists of rectangular section box in shape of L including a vertical and horizontal section, divided by a movable gate, at the bottom of horizontal length of reinforcement bar are fitted and vertical section will be fill with self-compacting concrete, and then the gate lifted to let the concrete flow into the horizontal section.

L Shape Box is used for determining the passing ability rate of freshly mixed self compacting concrete. The distance between 12 mm diameter bars can be set between 41±1 mm or 59±1 mm.

L Shape Box is designed for ease of cleaning the vertical and horizontal hoppers.