... ,column,beam,truss. Nondestructive concrete testing instrume HT-225A Concrete Test Hammer Detail informationSpecifications: ModelHT-225ANominal kinetic energy2.207J(0.225kgf ... (50-80g)Mean-value of steel-anvil rating of concrete test hammer80+/-2StandardsISO/DIS 8045, EN 12504-2, ENV 206, DIN ... 1048 part 2, ASTM C 805, ASTM D 5873, NFP 18-417, B 15-225 ...