There will not be a simple chart vs wall support reference webpage.. not that simple.
First, determine the beam or structural section you think might work..
https://www.engineersedge.com/struct...pes_menu.shtml
Determine the Area moment of Inertia
https://www.engineersedge.com/standa...properties.htm
Then determine the Yield strength of the material used in the structural shape
https://www.engineersedge.com/materi...d_strength.htm
https://www.engineersedge.com/manufa...s_strength.htm
Determine the desired Factor of Safety (FOS) relative to the yield strength - I recommend 1.5 or so..
https://www.engineersedge.com/analys...ety-review.htm
Figure out the loading configuration then select the calculator that best fits.
https://www.engineersedge.com/beam_calc_menu.shtml
Calculate the Deflection, stress and so on and compare to the structural shape specifications and FOS.
Repeat until you're satisfied you have the right structural support member.