HT-225A Concrete Hammer Test strength of concrete material: slab,column,beam,truss. Used in civil ... engineering,construction,etc HT-225A Concrete Strength Hammer Detail informationSpecifications: ModelHT-225ANominal kinetic energy2.207J(0.225kgf ... 15-225, JGJ/T 23-2001, JJG 817-1993Dimension60x280mmNet weight1kg Strength Hammer