What is the acceptable range of actual depths for a welded built-up beam with a specified depth of 10 inches?

The acceptable range of actual depths for a welded built-up beam is critical to ensure that the beam meets structural integrity and design specifications. When considering the specified depth of 10 inches, a tolerance is applied to account for variations in manufacturing and assembly processes.

The correct answer indicates that the acceptable tolerance is 10 inches plus or minus 1/8 inch. This means the beam can measure anywhere from 9.875 inches to 10.125 inches. A tolerance of 1/8 inch is practical, as it allows for minor discrepancies that can occur without compromising the performance of the beam in its intended application.

Using a tolerance that's too tight, such as 1/16 inch, may not be feasible in real-world applications due to the inherent imperfections in material and fabrication processes. Conversely, a larger tolerance like 1/2 inch would be excessive and could lead to structural issues or failures if the beam were undersized or oversized compared to design intentions.

By allowing a margin of 1/8 inch, engineers ensure a balance between precision in construction and the realities of fabrication, which is essential in maintaining both safety and functionality in welded constructions.