The impactor shall be cylindrical with a diameter d of the cylinder of 600 ± 50 mm and a length b of not less than 2500 mm. Its edges shall be rounded to a radius of curvature of not less than 1,5 mm.
Löökkeha peab olema silindriline keha läbimõõduga d = 600 ± 50 mm ja pikkusega b < 2500 mm. Selle servad peavad olema kumerad kumerusraadiusega vähemalt 1,5 mm.