US 9,290,959 B1
Site-cast coupled prestressed concrete wind tower
Maher K. Tadros, Omaha, NE (US); and Chuanbing Sun, Omaha, NE (US)
Assigned to e.Construct.USA, LLC, Omaha, NE (US)
Filed by e.Construct.USA, LLC, Omaha, NE (US)
Filed on Mar. 12, 2015, as Appl. No. 14/656,572.
Claims priority of provisional application 61/952,030, filed on Mar. 12, 2014.
Claims priority of provisional application 61/973,661, filed on Apr. 1, 2014.
Int. Cl. E04H 12/00 (2006.01); E04H 12/12 (2006.01); E04H 12/16 (2006.01); E04H 12/34 (2006.01); F03D 11/04 (2006.01)
CPC E04H 12/12 (2013.01) [E04H 12/16 (2013.01); E04H 12/342 (2013.01); F03D 11/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A tower, comprising:
a plurality of vertically stackable modular units, each modular unit of the plurality of modular units comprising:
three generally hexagonal columns; and three concrete panels coupled to the three hexagonal columns, wherein the three concrete panels and the three hexagonal columns jointly form a equilateral triangular prism; wherein the modular units are vertically stacked to form the tower without post-tensioning.