1
Maher K Tadros, Amin Einea, Mohsen Saleh: Prestressed concrete joist. Board of Regents University of Nebraska Lincoln, Suiter & Associates PC, September 30, 1997: US05671573 (29 worldwide citation)

A precast, prestressed concrete joist having web openings through which mechanical and electrical equipment may pass. In an exemplary embodiment, the joist comprises generally horizontal opposite top and bottom concrete members with a concrete web interposed between them. This web may have openings ...


2
Maher K Tadros, Amin Einea, Mohsen Saleh: Method for manufacturing an improved prestressed concrete joist. Board of Regents University of Nebraska Lincoln, Suiter & Associates PC, March 14, 2000: US06036906 (2 worldwide citation)

A precast, prestressed concrete joist having web openings through which mechanical and electrical equipment may pass. In an exemplary embodiment, the joist comprises generally horizontal opposite top and bottom concrete members with a concrete web interposed between them. This web may have openings ...