Chattahoochee River Whitewater Topics: ? drums for floating pier

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	Name:	roswellric -
	Subject:	? drums for floating pier
	Date:	5/11/2007 8:05:55 AM

You'll need to know the approximate weight of the dock and the displacement of the drums. One cu. ft. of air in the drum will displace about 7 1/2 lbs of water and float that much weight. So if your dock weighs 750 lbs you will need 100 cu ft of drum volume.

I think I have that right.... any AU physics majors out there?