Okay, I found a lot of crap, but these two are the most interesting.
First from IM #135 Titanium man pulls out a skyscraper down after destroying the columns of one side, the armor is capable off pushing it back but it takes some power to do so. Armor told me some time ago that this might be Class M depending on the method.
IM #259 carries a "16,000 ton" nuclear reactor from california to half a mile deep in the pacific trench.
For one, the feat is not done by an amped ironman like the profile states, i confirmed it, but for two, I don't know where the 16,000 ton figure comes from as is not 'clearly' stated in the comics.
And for three, it also counts as speed feat since he managed to travel such a long distance in less than seventy seconds while carrying a hampering amount of weight.
Miscellaneous but in IM #229 a weaker armor like the stealth suit can easily lift and toss this large boulder, Titanium man proceeds to destroy it with the same beams that the suit tanks in the page.