ASTM C-39 and AASHTO T-22
Free floating bearing platen seats under test pressure.
Used when testing 6” (152 mm) or 4” (101 mm) diameter concrete cylinders in compression. Platen is manufactured from steel with all components plated for corrosion resistance.
Its bearing platen is 6.5” (165 mm) in diameter, through hardened to HRC 55 or greater, plane to .0005” (.02 mm), has scribed concentric circles, and is hard nickel plated for wear resistance.