On Mon, 14 Jan 2008 22:00:35 -0800, los730 wrote:

im a student making a i beam from scratch i need to know the weight i
can hold them without having deflection dimensions are 1/8" steel 3'
in the midddle 3' top and bottom if any one has info they can help plz
contact me

Zero, zip, nada, none.

Add one extra hydrogen atom to the middle of your beam, and there'll be
some infinitesimal amount of bending to go with it.

You need to ask how much load can you put on for a certain amount of
deflection. You also need to specify the length of the beam and how the
ends are supported. Finally, do you really mean three _feet_, as in
almost one meter?

--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html