As with other stations built as part of the original IRT, the tunnel is covered by a "U"-shaped trough that contains utility pipes and wires. The bottom of this trough contains a foundation of concrete no less than thick. The lowest sections of the trough's outer walls are composed of transverse arches wide. Each platform consists of concrete slabs, beneath which are located drainage basins. Columns between the tracks, placed atop the transverse arches, support the jack-arched concrete station roofs. Unlike in most original IRT stations, the majority of these columns are not built-up I-beams. Along the northern end of the platforms there are dense clusters of I-beam columns, while the remainder of the platform contains circular, cast-iron Doric-style columns spaced every . The ceiling is about above platform level; the section of the ceiling north of the fare control area is smooth, and the section south of fare control is composed of segmental vaults supported by the center columns. There is a gap between the trough wall and the platform walls, which are made of -thick brick covered over by a tiled finish.