Which option correctly lists the three primary load types to consider in bridge design?

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Multiple Choice

Which option correctly lists the three primary load types to consider in bridge design?

Explanation:
In bridge design, you think in three main kinds of forces: the weight of the structure itself (dead load), the loads from use and traffic (live load), and environmental forces from nature such as wind and earthquakes (environmental loads). The option that lists dead load, live load, and environmental loads (wind and seismic) matches these categories, which is why it’s the best choice. Thermal expansion matters for design features like joints and material selection, but it isn’t treated as one of the three primary load categories in this context. The other options mix in or omit these standard groups, so they don’t align with how bridges are typically analyzed.

In bridge design, you think in three main kinds of forces: the weight of the structure itself (dead load), the loads from use and traffic (live load), and environmental forces from nature such as wind and earthquakes (environmental loads). The option that lists dead load, live load, and environmental loads (wind and seismic) matches these categories, which is why it’s the best choice. Thermal expansion matters for design features like joints and material selection, but it isn’t treated as one of the three primary load categories in this context. The other options mix in or omit these standard groups, so they don’t align with how bridges are typically analyzed.

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