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Charlotte Motor Speedway high-def video board to be topped out

The steel frame for what Charlotte Motor Speedway calls the world’s largest high-definition video board is going up.

An event to “top out” the frame is set for Thursday at the speedway’s backstretch.

When a construction project is topped out, it means the highest point of a project has been built.

The final, 40-foot beam is slated to be placed on top of the 500,000-pound steel structure.

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