Wassup guys!

My chain rubs my FD whenever I stand up and mash on steep hills. I adjusted my FD properly, it never rubs otherwise.

I'm 240 lbs and I ride a Schwinn Fastback(the one in my signature). It's an entry level bike, so it comes with low level components to say the least.

So my question is, what's most likely to flex? The frame or crank?