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inspired by double-tee designs that have been used to build railroad platform slabs. The use of double tees with wide flanges allows the use of fewer beams, which stay in place to form the deck, resulting in a shorter construction time. The first design was introduced in 2008, called "NEXT F" with 4 in flange thickness requiring a 4 in topping. This was used for the construction of the Maine State Route 103 bridge that crosses the York River.

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