Final answer:
The size of the crane pad must be larger than the outrigger pad, determined by manufacturer's specifications or engineering advice, considering load capacity, ground conditions, and safety factors.
Step-by-step explanation:
The size of the crane pad should always be larger than the size of the outrigger pad to ensure stability and safety. Without specifying the type of crane or the conditions of use, it is not possible to provide a precise measurement for all scenarios. However, the appropriate size would typically be determined by the crane manufacturer's specifications or engineering recommendations, taking into consideration the crane's load capacity, the ground conditions, and safety factors.
Options presented, such as 'the same size', '2 inches larger', '6 inches larger', or '12 inches larger', may not apply universally. It is always essential to consult the manufacturer's guidelines or a structural engineer to determine the correct size. The most important consideration is that the crane pad must provide adequate support for the loads applied by the outrigger pads and safety margins.