When the weld temperature is less than 400 degrees F, how high shall the weld be left at each end of a 36 inch straight edge?

The question pertains to the guidelines for finishing the ends of a weld when the weld temperature falls below 400 degrees Fahrenheit. In thermite welding, managing the height of the weld is crucial for ensuring structural integrity and quality.

When the weld temperature is maintained below 400 degrees F, the necessary height to be left at each end of a 36-inch straight edge is significant for several reasons. It ensures that the weld can accommodate slight variations or deformations that can occur during cooling. Leaving a higher weld height, such as .015 thousands, provides adequate allowance to help mitigate stress concentrations and achieve a proper connection with the joining pieces.

Additionally, this practice helps in achieving a smooth transition at the weld interface, which is important for load distribution and aesthetic finishes. Proper knowledge of welding specifications and standards informs the choice of .015 thousands, as it reflects industry practices aimed at ensuring the reliability and performance of the welded joint.