Deepak Stone Crusher 24 Wheel Mounted Rock Crushers Uk. 24 hours. A value of 3 lbs. 1.4 kg or less is believed to be acceptable to most flooring and coating manufacturers. Values on extremely wet floors have been recorded showing greater than 10 lbs. per 1,000 ft per 24 hours 4.5 kg per 90 m per 24 hours.