Turn to Clause 4.6 (Undercfloor Raceways). The PDF specifies minimum cover (2 inches of concrete), sweeping bends (no hard 90-degree elbows without pull boxes), and separation from power lines.
ANSI/TIA-569-E: Telecommunications Pathways and Spaces - TIA FOTC tia569e pdf work
If you are involved in a construction or retrofit project, working with the digital PDF version of TIA-569-E offers distinct advantages over a printed binder: Turn to Clause 4