Metal building repair

Hello All,
I have a 40' X 20' metal buiding that has some rusted places at the bottom of the leaves that make up the walls. Problem is, this building has not framework inside. The walls them selves provide the support for the structure.
I want to brace the structure prior to repairing the rust damage. 4" X 4" timber has been considered, but I can't find compression load specs to suit.
Any ideas?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.