Where are wedges permitted according to thermite welding guidelines?

Wedges are permitted in switch areas according to thermite welding guidelines due to their specific function in the alignment and stabilization of components during the welding process. Switch areas require precision and stability to ensure that the welded joints maintain their integrity and functionality within the railway or track system. Wedges help to securely hold the pieces in place, preventing any unwanted movement that could lead to misalignment or a weak weld.

Utilizing wedges in other environments, such as straight areas, repair sections, or storage locations, is generally not aligned with the intended use and requirements for thermite welding. These scenarios often involve different stabilization methods and do not necessitate the specific use of wedges that are crucial in switch areas for proper alignment and support during the welding operation.