On Tue, 17 Jun 2014 13:38:34 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

Jim fired this volley
in roups.com:

Another will be at 10' above
grade and the opposite one, the highest, at 11' above grade.
Can anyone tell me if A500 B grade 4"x4"x1/4" tubing will do the job?

Look up beam load tables for ASTM500 grade resistance welded square
tubing.
There are many on the web, but the links are ugly to post. Like this:

http://www.google.com/url?sa=t&rct=j...ource=web&cd=6
&cad=rja&uact=8&ved=0CDkQFjAF&url=http%3A%2F%2Fww w.pirate4x4.com%2Ftech%
2Fbillavista%2FPDFs%2FHollow%2520Structural%2520S ections%
2520LRFD_Beam_Load_Tables.pdf&ei=H4qgU8_kEsrNsQT9 r4D4CQ&usg=AFQjCNENcs3
_ZcMBrsNCKXgrhSmJdp6cpA&sig2=kNVIcdG4-LkJez8mY_KxGw&bvm=bv.68911936,d.cWc

Lloyd, here is the output from that link:
Redirect Notice

The previous page is sending you to
http://www.pirate4x4.com/tech%%202Fb... ad_Tables.pdf.

If you do not want to visit that page, you can return to the previous
page.

--
There is nothing more frightening than ignorance in action.

--Johann Wolfgang von Goethe