When a weight of the maximum load is applied to the datum load center of the shuttle, how much should the stress value generated by the shuttle be below the yield strength value of the shuttle steel?

When determining how much the stress value generated by the shuttle should be below the yield strength value of the shuttle steel, it is essential to consider safety factors in the design and operation of equipment like forklifts.

The choice indicating that the stress should be at or below 1/3 of the yield strength is correct because this establishes a buffer that helps ensure structural integrity and safety during operation. The yield strength is the maximum stress that a material can withstand without permanent deformation. If the stress approaches this limit too closely, there is a heightened risk of failure or unexpected behavior under load.

Maintaining the working stress below 1/3 of the yield strength means that there is a substantial safety margin, which is critical for ensuring that the shuttle can handle the maximum load conditions without leading to structural issues. This aligns with engineering best practices which often require a safety factor to account for various uncertainties, such as load variations and material imperfections.

In contrast, the other options suggest ratios that may not provide adequate safety margins. For instance, options like 1/2 or 2/3 might not sufficiently ensure that the shuttle remains safely under its maximum load conditions, significantly increasing the risk of structural failure. Staying within the 1/3 limit reflects a more cautious