The two types of scaffolds used by pipefitters are the Tubular Buck and?

The answer identifies "Pole" as the second type of scaffold used by pipefitters alongside the Tubular Buck. This choice is correct because pole scaffolds are essential for various applications in pipefitting. Pole scaffolds are characterized by the use of vertical poles that provide a framework for supporting platforms and enabling access to different heights when working on piping systems.

Pole scaffolding is often utilized in conjunction with the Tubular Buck, with both types offering stable support and safety for pipefitters when they are installing or repairing pipes. The use of pole scaffolds allows for flexibility in construction as they can be adjusted and arranged to meet the specific requirements of the job at hand. Proper scaffolding is critical in pipefitting to ensure safety and efficiency in operations, especially when dealing with heavy and complex piping systems.

In contrast, the other options do not represent commonly recognized scaffold types within the context of pipefitting. Web, beam, and flange do not correspond to established scaffolding configurations, hence their inapplicability in this scenario. Understanding the distinct roles that various scaffold types play is vital for ensuring safety and compliance with industry standards.