A 115# to 132# compromise weld will have a ________" offset on the gauge side of the base.

In thermite welding, the offset is an important measurement that ensures proper alignment and fusion of the materials being welded. The specified range of a 115# to 132# compromise weld indicates that it requires a certain offset to achieve the desired welding characteristics, specifically in managing the spacing between the rail or base materials being joined.

An offset of 1/8 inch is the standard for this type of weld because it provides a good balance between allowing for adequate penetration of the thermite reaction and maintaining structural integrity. This smaller offset is critical for ensuring that the heat generated during the thermite process is effective at melting the base metals without creating excessive distance between the pieces, which could lead to incomplete fusion or weak welds.

Choosing the correct offset is crucial in achieving optimal welding results, as different offsets could lead to issues like undercutting or poor joint strength. Hence, the 1/8 inch offset is aligned with established practices for ensuring a strong and effective thermite weld in the given weight range.