Featuring air vibrators that achieve 9,500 VPM at 60 PSI and able to span 75 feet without deflection, the Allen Model 36 Air Screed handles slabs and paving jobs standard duty screeds cannot. The 33 1/2" tall A-Frame Truss is constructed of 2" square steel tubing and 5/8" steel truss rods, producing a rigid, stable truss capable of handling the toughest paving jobs efficiently.