Which tool is used to align bolt holes during construction?

The tool used to align bolt holes during construction is the bull pin. This tool is specifically designed for driving a pin through oversized or misaligned bolt holes, allowing the bolts to be inserted easily. The bull pin has a tapered end that helps guide the alignment and ensure that holes can be matched up correctly to facilitate the bolting process.

Using a bull pin is essential in scenarios where precision is key, and maintaining proper alignment is critical to the structural integrity and safety of the construction project. By effectively aligning the holes, ironworkers can ensure that the components fit together as intended, which is crucial when assembling large structures.

In contrast, clamps primarily serve to hold materials together, drills are used for creating holes rather than aligning them, and measuring tapes are utilized for verifying distances and dimensions, but none provide the specific function of aligning bolt holes like the bull pin does.