What should be used to cut openings for pipe in solid masonry structures when power tools are unavailable?

Using a star drill and hammer is an effective method for cutting openings for pipes in solid masonry structures, especially when power tools are not available. The star drill is designed specifically for drilling into hard materials like masonry and concrete. Its unique star shape provides stability and allows for effective penetration into solid surfaces.

When using a star drill, a hammer is employed to strike the drill, driving it into the masonry. This technique is particularly useful in situations where precision is needed for pipe openings but power equipment is impractical or unavailable.

While other options like a chisel, masonry saw, or regular drill might seem viable, they would not be as effective or appropriate for this specific task. A chisel requires a lot more manual effort and skill to achieve clean, precise openings. A masonry saw is a power tool, which goes against the premise of working without power tools. A regular drill lacks the necessary design and power to drill effectively into masonry without potentially damaging the surface. Hence, the combination of a star drill and hammer stands out as the correct choice for cutting openings in solid masonry without power tools.