What does a tautly-drawn wire or string help to determine during container inspections?

A tautly-drawn wire or string during container inspections is primarily used to assess the structural integrity of the container. By extending a line across the surface of the container, inspectors can visually determine if there are any irregularities in the shape, such as if the container is racked (leaning or out of alignment) or bowed (curved outward). This technique enables a quick and effective evaluation of any deformations that could affect the safe transport of goods.

Other options, such as determining the color, weight capacity, or manufacturing date of the container, do not relate to the primary function of using a taut line. Color is a visible characteristic, weight capacity is a specification that does not necessitate physical inspection with a taut line, and the manufacturing date is typically marked on the container itself and can be verified through documentation rather than through this inspection method. The focus of using a tautly-drawn wire or string is specifically to identify structural issues, making it a valuable tool in assessing the condition of containers prior to loading.