Columns selection

[Emzielou83]

Hi all,

I need some help.

Select the lightest wide flange section that can be used as a steel column 7m long tosupport an axial load of 450kN with a factor of safety of 3. Use 200MPa as the limitof elasticity, 200GPa as the modulus of elasticity and assume that the column issimply supported.

I have a printout with my assignment of universal columns dimensions and properties. I dont reall yknow what i'm supposed to be working out here.

Can any one help?

Thanks

Emma

[nvn]

Hi, Emzielou83. There is a template you must use when you post a question. You must list relevant equations yourself, and you must show your work. Then someone might check your math. Is this a test question? Also, engineering coursework questions go here (http://www.physicsforums.com/forumdisplay.php?f=158). By the way, the international standard (http://en.wikipedia.org/wiki/SI#SI_writing_style) for writing units (ISO 31-0 (http://en.wikipedia.org/wiki/ISO_31-0#Names_and_symbols_for_units)) states that there should always be a space between a numeric value and its following unit symbol. E.g., 200 MPa, not 200MPa. You can see this by looking in any text book.