The treads, which are made from millstone grit, which is a particularly strong sandstone, are basically rectangular in section with carved soffits and a small rebate.
Common interior applications include lobby walls, soffits, column facings, and interior walls of elevator cabs.
Inside are visible the tranverse and axial beams plain chamfered except in the service end with joists lathed and plastered to soffits.
The first-floor entry lobby, while reduced in size from its original configuration, retains its 16ft m ceiling, featuring a cast-plaster cornice, moldings, soffits, and modillions.
A simple cornice adorns the soffits on the north and south eaves.
The soffits of the panels have a smooth uniform finish as a result of casting them in polished steel molds.
Further work was carried out in the 1960s to repair the underside soffits of all three arches.
The bottoms of these tiers of windows, located at the second floor of the building, feature terra cotta soffits; the building's cornice is also terra cotta.
