Final answer:
A random-crack saw is designed to follow the natural 'cracks' in concrete, creating junctions or repairing existing cracks, while a regular concrete saw is used for straight, predetermined cuts. Understanding the difference between 'packing' and 'cracking' helps in deciding the appropriate saw to use.
Step-by-step explanation:
The main difference between a random-crack saw and a regular concrete saw is their usage and the pattern they make. A random-crack saw is specifically designed to follow the natural contours or 'cracks' in concrete. It is used to create joints or to follow the random paths of cracks for repair purposes.
On the other hand, a regular concrete saw is typically used for making straight, predetermined cuts in concrete surfaces. The pattern of mudcracks, being wider at the top and narrower at the bottom, informs the way a random-crack saw may be operated to best address the concrete's natural cracking, while a regular saw would not account for this pattern.
Understanding the difference between 'packing' and 'cracking' is crucial when deciding when to use each type of concrete saw. 'Packing' refers to filling in the cracks or joints in concrete, which might be done after cutting, whereas 'cracking' refers to the natural formation of cracks in the concrete, which is what the random-crack saw is designed to follow.