A recessed trench drain with a U-shaped trough is cast into the concrete floor slab adjacent to an expansion joint assembly. The slab is supported by steel framing members below at Level 12, elevation 145 feet 1 inch. Precise dimensional string callouts indicate spacings of 1 inch 5/8, 4 inches 4 and 1/2, 1 inch 5/8, 9 inches 7, and 4 inches 11 and 1/4 across the drainage and expansion joint zone. The trench opening measures 1 foot 10 inches wide.
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