IS: 516, IS: 9399, BS: 1881, and ASTM C78 The Flexure Strength Testing Machines are designed to provide maximum rigidity throughout their working range. The downward movement of Hydraulic ram applies the load. The jack can be raised or lowered for testing different size beams. The load is indicated on a calibrated Bourdon tube type load gauge of range: 0-100KN X 0.5KN (0-10,000 kgf X 50 kgf). The load gauge is calibrated against NPL/NCCBM certified proving ring.