What is the maximum allowable deviation from a plumb line for a single-column shipping piece?

The maximum allowable deviation from a plumb line for a single-column shipping piece is typically set at 1/1500. This value ensures that the structure maintains its integrity and alignment during the shipping and installation processes. A plumb line is used to achieve vertical alignment; deviations beyond the specified limit can lead to structural issues, affecting the overall stability and strength of the structure when it is erected.

The choice of 1/1500 indicates a balance between practical manufacturability and ensuring sufficient precision to meet engineering standards. Stricter tolerances, such as those indicated in other choices, may not be necessary for all applications and could lead to increased production costs or difficulties in achieving those tolerances consistently on the job site. Maintaining this deviation limit helps ensure that the structures built are safe, efficient, and function as intended without compromising their structural performance.