What is the bottom steel plate of a bearing anchored to a concrete bridge seat?

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Multiple Choice

What is the bottom steel plate of a bearing anchored to a concrete bridge seat?

Explanation:
The main idea here is that a masonry plate provides a stable, flat, load-distributing surface between the bearing and the concrete bridge seat. This steel plate sits underneath the bearing to spread its vertical load over a larger area of concrete, reducing local crushing and helping align the bearing properly. It also protects anchor bolts from direct contact with rough concrete and accommodates minor surface irregularities so the bearing sits true. The other terms don’t fit the role: nail laminated is a wood construction term, a mandrel is a shaping tool, and PVI refers to a surveying concept rather than a structural plate used at the bearing–seat interface.

The main idea here is that a masonry plate provides a stable, flat, load-distributing surface between the bearing and the concrete bridge seat. This steel plate sits underneath the bearing to spread its vertical load over a larger area of concrete, reducing local crushing and helping align the bearing properly. It also protects anchor bolts from direct contact with rough concrete and accommodates minor surface irregularities so the bearing sits true. The other terms don’t fit the role: nail laminated is a wood construction term, a mandrel is a shaping tool, and PVI refers to a surveying concept rather than a structural plate used at the bearing–seat interface.

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