Clerical work	Lifting, using knees, no more than 5 lb (2.3 kg) up to three times per hour
	Squatting up to four times per hour
	Standing or walking with a five-minute break at least every 20 minutes
	Sitting with a five-minute break every 30 minutes
	No extreme extensions or flexions, twisting, or climbing ladders
	Driving car for up to two hours per day
Manual work	Lifting, using knees, no more than 25 lb (11.3 kg) up to 15 times per hour
	Squatting up to 16 times per hour
	Standing or walking with a 10-minute break at least every one to two hours
	Sitting with a 10-minute break every one to two hours
	Extreme extension or flexion allowed up to 12 times per hour
	Extreme twisting allowed up to 16 times per hour
	Climbing ladders allowed up to 25 rungs six times per hour
	Driving car or light truck up to one full work day
	Driving heavy truck up to four hours per day