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I have seen cardboard tubes used as concrete forms

try 

http://www.acepapertube.com/products.htm

http://www.e-corestore.com/topnav/products/core_store_concrete_forming.htm


Bob Friedhoffer
CUNY-CASE
365 5th Avenue - #3300
NYC, NY  10016

212 817 1841
www.sciencetrix.com


Bob Friedhoffer
CUNY-CASE
365 5th Avenue - #3300
NYC, NY  10016

212 817 1841
www.sciencetrix.com



-----Original Message-----
From: Informal Science Education Network on behalf of ISEN-ASTC-L automatic digest system
Sent: Fri 2/3/2006 12:00 AM
To: [log in to unmask]
Subject: ISEN-ASTC-L Digest - 1 Feb 2006 to 2 Feb 2006 (#2006-27)
 


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