An apparatus and method for precision forming a precast concrete flight of stairs is disclosed and where precision cut form components provide plural tread supports, plural sideboards, plural tread/riser combinations and a center tread support that upon assembly, the form components, automatically square and align treads and risers with upper and lower landings for installation to provide access between vertically spaced apart floors of a structure.

An assembly for constructing concrete stairways and stairs that includes siderails that are configured to the attached to the walls on either side of an area where a stairway is to be constructed. A plurality of riser brackets and tread brackets are pivotally and slidably coupled to the siderails and pivotally and slidably connected to one another so as to allow for height, length and level adjustment of the individual riser brackets and tread brackets. The configuration further allows the riser brackets and trend brackets to fold up and be linearly aligned with the siderails for transportation and storage.

A prefabricated stair modular assembly mold comprises a base, a step standard module, an upside module of a lower platform, an underside rotating module of a lower platform, an upside module of an upper platform, an underside rotating module of an upper platform, an underside common module, and an underside adjustment modules. Prefabricated stair molds of different dimensions are formed by means of locating holes provided in the assembling modules, and are then fixed by means of sliding holes at two ends. Further disclosed is a mounting method for said assembly mold. Said assembly mold has high positioning accuracy, and small accumulated error, improving the mounting efficiency of the prefabricated staircase mold.

A prefabricated stair modular assembly mold comprises a base, a step standard module, an upside module of a lower platform, an underside rotating module of a lower platform, an upside module of an upper platform, an underside rotating module of an upper platform, an underside common module, and an underside adjustment modules. Prefabricated stair molds of different dimensions are formed by means of locating holes provided in the assembling modules, and are then fixed by means of sliding holes at two ends. Further disclosed is a mounting method for said assembly mold. Said assembly mold has high positioning accuracy, and small accumulated error, improving the mounting efficiency of the prefabricated staircase mold.

An apparatus and method for precision forming a precast concrete flight of stairs is disclosed and where precision cut form components provide plural tread supports, plural sideboards, plural tread/riser combinations and a center tread support that upon assembly, the form components, automatically square and align treads and risers with upper and lower landings for installation to provide access between vertically spaced apart floors of a structure.

The present invention provides a stair edging component or nosing assembly comprising a plurality of elongate inserts, each insert comprising a main body portion having a tread surface and a coupling interface to couple the insert to the stair, and an opening extending through the length thereof, a locating spacer located between each pair of inserts, and a tensioning means extending through the opening in each insert and along the length of the stair edging component.