I am designing a self supported tower 30 meters high, i need to decide wether to use Angles or Pipes. Can you help me?? Thanks Ibrahim -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search.htm