I thought i'd post this in here since it seems like there should be some people knowledgeable about the strength of steel frames..
Anyway, i have a new lugged steel Rivendell Bleriot. It has 650b wheels and fairly fat tires (584 x 33). I've been gentler to it than my mountain bike, but i have not hesitated to blast across grassy areas, gratuitously bunny hop curbs and other obstacles, and take it on some mild trails.
Is this bad? I'm not heavy (~ 145 lbs) and i consider myself a fairly finessed rider, at least as a mountain biker. I guess i was just wondering if a road frame, even a pretty sturdy one like this, is going to be damaged by things like bunny hopping... This is my first 'road' bike so i'm not quite sure what to expect.