hamil
In general, you should align the aircraft parallel to the straight side and then turn towards the turning pad. If you go into the pad first then you risk dragging the main gear across the corner of the pad. The are a few exceptions where this would cause blast damage but in these cases there are clear taxiway markings and the pad corners have been extended (Islamabad is one such case). Mumbai can be confusing as there are narrow turning pads on both sides at the 27 threshold, but they are long enough to avoid problems with the main gear.
The absolute minimum turning circle for a B747-400 (assuming you get everything right) is 46.6m.
Airclues