Lattice tower

A lattice tower (10) for supporting loads comprising:

• a) three metallic legs (11) arranged in a triangular configuration around a vertical axis (12) of the lattice tower (10), wherein
• each metallic leg (11) has a closed cross-section profile,
• a distance between centers (16) of metallic legs (11) in a bottom portion (17b) of the tower is greater than 4 meters,
• an angle of inclination of a central longitudinal axis of each metallic leg (11) in relation to the vertical axis of the tower (12) is between −1.7 degree and +1.7 degrees, and
• a height of the lattice tower (10) is greater than 60 meters;
• b) a plurality of bracing members;
• and
• c) a support platform (14) disposed at a top portion of the tower (17a);
• wherein said tower (10) is vertically divided in three portions, each portion comprising at least one module (20), and wherein the three portions comprise:
• a first portion (21a) comprising three first legs (21b), at least one of the first legs (21b) having a frustoconical cross-section and a bottom portion (30b) having a larger diameter than a top portion (30c);
• a second portion (22a) comprising three second legs (22b), each second leg (22b) linearly aligned with and coupled to a corresponding first leg (21b) of the first portion (21a);
• and
• a third portion (23a) comprising three third legs (23b), each third leg (23b) linearly aligned with and coupled to a corresponding second leg (22b) of the second portion (22a), at least one of the third legs (23b) having a frustoconical cross-section and a top portion (31b) having a larger diameter than a bottom portion (31c).

A lattice tower (10) for supporting loads comprising:

• a) three metallic legs (11) arranged in a triangular configuration around a vertical axis (12) of the lattice tower (10), wherein
• each metallic leg (11) has a closed cross-section profile,
• a distance between centers (16) of metallic legs (11) in a bottom portion (17b) of the tower is greater than 4 meters,
• an angle of inclination of a central longitudinal axis of each metallic leg (11) in relation to the vertical axis of the tower (12) is between −1.7 degree and +1.7 degrees, and
• a height of the lattice tower (10) is greater than 60 meters;
• b) a plurality of bracing members;
• c) a support platform (14) disposed at a top portion of the tower (17a);
• and
• a yaw mechanism support structure (43) to support a wind energy turbine with an elongated nacelle (56) having a plurality of rotor blades (44) operatively coupled to an electric generator (45), said yaw mechanism support structure (43) comprising:
• a support platform having a body (46), an upper surface (47), and a lower surface (48);
• a circular track (49) defined close to the perimeter of the upper surface (47) of the said yaw mechanism support structure (43);
• a turbine longeron support frame (52) having a first end (53) and a second end (54) spaced apart from the first end (53) by a distance of at least one radius of the circular track (49), the turbine longeron support frame (52) being pivotally coupled to the yaw mechanism support structure (43) that is perpendicular to the first axis (51) and parallel to the upper surface (47) of the yaw mechanism support structure (43), the turbine longeron support frame (52) being configured to support at least a weight of the plurality of rotor blades (44) and the electric generator (45) of the wind energy turbine with the elongated nacelle (56) mounted thereto;
• and
• at least an interface (61) disposed proximate the second end of the turbine longeron support frame (54) and between the turbine longeron support frame (52) and the circular track (49), the at least an interface (61) being configured to provide for the second end of the turbine support frame (54) to move along the circular track (49) to provide adequate yaw to the wind direction (60).

A lattice tower (10) for supporting loads comprising:

• a) three metallic legs (11) arranged in a triangular configuration around a vertical axis (12) of the lattice tower (10), wherein
• each metallic leg (11) has a closed cross-section profile,
• a distance between centers (16) of metallic legs (11) in a bottom portion (17b) of the tower is greater than 4 meters,
• an angle of inclination of a central longitudinal axis of each metallic leg (11) in relation to the vertical axis of the tower (12) is between −1.7 degree and +1.7 degrees, and
• a height of the lattice tower (10) is greater than 60 meters;
• b) a plurality of bracing members;
• and
• c) a support platform (14) disposed at a top portion of the tower (17a);
• wherein said tower (10) is vertically divided in three portions, each portion comprising at least one module (20), and wherein the three portions comprise:
• a first portion (21a) comprising three first legs (21b);
• a second portion (22a) comprising three second legs (22b), each second leg (22b) linearly aligned with and coupled to a corresponding first leg (21b) of the first portion (21a);
• and
• a third portion (23a) comprising three third legs (23b), each third leg (23b) linearly aligned with and coupled to a corresponding second leg (22b) of the second portion (22a), wherein a diameter of each respective third leg (23b) of the third portion (23a) is larger than a diameter of each respective second leg (22b) in the second portion (22a).

A lattice tower (10) for supporting loads comprising:

• a) three metallic legs (11) arranged in a triangular configuration around a vertical axis (12) of the lattice tower (10), wherein
• each metallic leg (11) has a closed cross-section profile,
• a distance between centers (16) of metallic legs (11) in a bottom portion (17b) of the tower is greater than 4 meters,
• an angle of inclination of a central longitudinal axis of each metallic leg (11) in relation to the vertical axis of the tower (12) is between −1.7 degree and +1.7 degrees,
• and
• a height of the lattice tower (10) is greater than 60 meters;
• b) a plurality of bracing members;
• c) a support platform (14) disposed at a top portion of the tower (17a);
• and
• d) auxiliary bracing members (13a), wherein the bracing members (13) or the auxiliary bracing members (13a) comprise at least one metallic bracing member (13) or at least one auxiliary bracing member (13a) with a closed cross-section filled with concrete.