In what scenarios can wood structural panels be used without restriction?

The correct answer pertains to the conditions under which wood structural panels can be employed without restriction, specifically at a mean height of 45 feet or less when the wind velocity (V(asd)) is up to 140 mph. This scenario meets the criteria outlined in building codes and design standards, which regulate the use of materials based on structural integrity under various environmental conditions.

Wood structural panels must be designed to withstand both vertical and lateral loads, including those from high winds. The specified mean height of 45 feet sets a practical limit for using wood panels without additional reinforcements or considerations. The wind speed of 140 mph reflects a high-performance standard, typically allowing buildings to maintain safety and stability in severe weather conditions.

This means that using wood structural panels in this context aligns with engineering principles that ensure safety and compliance with specific code requirements. Higher wind speeds or mean heights may necessitate further examination and possibly the use of different materials or structural strategies to ensure that the building can withstand such conditions effectively.

In contrast, conditions outside of this specific scenario either exceed safe wind levels or height limitations, prompting restrictions or alternative designs.