for 42" Plasma..weight 23.3kg.
2 x 12" steel channel welded/brazed end to end at an angle of about 135 degrees. Then fix some form to one end to allow fixing of shelves or use 6mm thick plate steel.eg || || || || || \\ \\ \\ \\ Plasma tv shelf \\============= \\ shelf for dvd player \\===========
Using something like this ebay item 390017580212
formatting link
idea a goer?
Arthur