Typically, a shredder used for MSW has four rows of hammers with a
width/diameter ratio greater than 1.0, a hammer weight of 150 lb (70 kg), a rotor
inertia of 35,000 lb-ft2 (1500 kg-m2), a hammer tip speed of 14,000 ft/min
(4260 m/min), and a starting time of 30 s.