Method and apparatus for production of precision precast concrete flights of stairs
(10) US 2017/0239838 Al
(22) 19.02.2016
(43) 24.08.2017
(57) 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.
(71) Richard J. Eggleston, II, Asotin, WA
