Yes, the 747 was at approximately a 90 degree roll angle when hitting the building.

btw it was not simply the uneven weight that caused the steering problems. For example, the Chicago DC-10 rolled towards the wing with missing engine...

You have a thrust difference, different airspeed over the wings, a damaged wing, damaged control surfaces, possible fuel leaks... In case of the DC-10, the damage to the wing caused the plane to roll, IIRC. I don't remember what happened exactly to the 747. They lost engines, and slowly started to lose control. ut I forgot the details. ANyway, that's not the point of discussion now.

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