Single Storeyed Building to SE of Octagonal Building at Bersham Ironworks Site.

Roughly 8-sided or near-circular brick and rubble structure, with pyramidal roof (the slates removed at time of inspection, July 1995). The roof is supported by pentagonal brick piers at each angle. Between the piers, the NW, E, and S walls appear to be contemporary brickwork. The S wall has relieving arch with later rubble infil below; the upper part of the elevation is open. There is a similar blocked arched opening in the E wall, which provided access to the adjacent 'fettling shop'. The NW wall is bowed out in its central section. The W side is open, while the SW elevation, which is brick above a rubble base, was probably infilled at a later date, and has a small ventilation slit. The N elevation has brick infil on a rubble plinth, with stone sill to open upper section. Blind brick infilled NE elevation. Single storeyed attached range has been extensively rebuilt (probably in the late C19-early C20), but incorporates earlier work between and below the windows in its N elevation. 5-light windows have concrete sills and lintels. In the E bay (probably a later extension), the roof is supported on cast-iron Wilkinson pipes. A-frame timber truss exposed in E gable. Lean-to extensions to S.

Although the building is now a single space internally, excavation in 1987 revealed traces of internal walls parallel to the external walls. These were probably removed to enable the building's reuse. Braced king-post roof, the king-post at the intersection of massive cross tie-beams. In the centre of the underside of the post, a cast-iron bracket has a central hole, probably associated with C19 agricultural machinery.