All heights in the drawing for the PROCESSING BARGE are from the highest possible edge for that associated level. The overall height of the second level is 32 in or 808mm from the ground. That height is taken from the lip of the plastic guard. The plastic guard is sitting on the HDPE platform and adjacent to an extrusion barrier. The plastic guard has a total height of 4cm. The distance between the top of the lip and the adjacent extrusion is 1.5cm.