Assuming a single voltage in the building... A 60HP motor LRA can be well over 1300A at start. Without soft-start of the motor, you'll be due for other problems not including the tripping of the main. As for tripping a main before a downstream breaker, it happens. But most often can be eliminated by making sure the current v. time curves are at least just outside of normal operation of equipment. And you should be able to get all of that information, and settings from the CB manufacturer. (Feel luck that you're looking for the right setting of a CB, and not the "Right Fuse"!) Either way it sounds like the Engineer, Elevator Rep, and yourself need to figure a few things out.
