A lattice structure, in particular a steel lattice structure, includes at least one longitudinal element and includes at least one edge element which runs perpendicularly or obliquely with respect to the longitudinal element, is embodied as a single wire, rod, wire strand, tube or profile and forms in particular at least a portion of a lattice edge, wherein the longitudinal element is wound multiple times around the edge element for its fastening to the edge element in a fastening region of the edge element.

A lattice structure, in particular a steel lattice structure, includes at least one longitudinal element and includes at least one edge element which runs perpendicularly or obliquely with respect to the longitudinal element, is embodied as a single wire, rod, wire strand, tube or profile and forms in particular at least a portion of a lattice edge, wherein the longitudinal element is wound multiple times around the edge element for its fastening to the edge element in a fastening region of the edge element.

A wind turbine foundation comprising a concrete support slab having a horizontal rebar grid therein, a concrete pedestal integral with the support slab and having vertical post tensioning elements therein and a plurality of concrete ribs on top of and integral with the support slab and integral with the pedestal, the ribs having rebar therein and extend outwardly from the pedestal, the pedestal, slab and ribs are connected to each other to form a monolithic foundation. The foundation design reduces the weight and volume of materials used, reduces cost, and improves heat dissipation conditions during construction by having a small ratio of concrete mass to surface area thus eliminating the risk of thermal cracking due to heat of hydration.

A fixture for setting rebar at a predetermined distance from the rim of an excavated pit includes elongated first and second legs each having a proximal end and a distal end, the first and second legs rigidly joined at their mutual proximal ends to form an L-shape; an angle adjustment device carried by the first leg, comprising a foot movable towards or away from the first leg along an axis generally parallel to the second leg; a support bracket carried by the first leg at a predetermined offset distance from the proximal end thereof; and a hook extending from the distal end of the second leg, generally parallel to the first leg.

A fixture for setting rebar at a predetermined distance from the rim of an excavated pit includes elongated first and second legs each having a proximal end and a distal end, the first and second legs rigidly joined at their mutual proximal ends to form an L-shape; an angle adjustment device carried by the first leg, comprising a foot movable towards or away from the first leg along an axis generally parallel to the second leg; a support bracket carried by the first leg at a predetermined offset distance from the proximal end thereof; and a hook extending from the distal end of the second leg, generally parallel to the first leg.

A fatigue resistant gravity based spread footing under heavy multi-axial cyclical loading of a wind tower. The foundation having a central vertical pedestal, a substantially horizontal continuous bottom support slab, a plurality of radial reinforcing ribs extending radially outward from the pedestal. The pedestal, ribs and slab forming a continuous monolithic structure. The foundation may have a three-dimensional network of post-tensioning elements that keep the structural elements under heavy multi-axial post compression with a specific eccentricity intended to reduce stress amplitudes and deflections and allows the foundation to have a desirable combination of high stiffness and superior fatigue resistance. The foundation design reduces the weight and volume of materials used, reduces cost, and improves heat dissipation conditions during construction by having a small ratio of concrete mass to surface area thus eliminating the risk of thermal cracking due to heat of hydration.

A panel includes structural studs, each of the structural studs includes a central longitudinal axis, a baseplate, and a sidewall extending from the baseplate, and tabs punched out of the sidewall, each of the tabs including a tab leg that is connected to the sidewall at one end of the tab leg, and that projects outwardly from the sidewall, and a tab foot extending from the tab leg and curving in a direction that is toward a plane extending perpendicular to the central longitudinal axis through the one end of the tab leg, and away from a hole in the sidewall created by the tab being punched out of the sidewall, wherein the hole is defined by a base side and a top side, the base side has a greater length than the top side, and the tab leg the extends from the base side.

A panel includes structural studs, each of the structural studs includes a central longitudinal axis, a baseplate, and a sidewall extending from the baseplate, and tabs punched out of the sidewall, each of the tabs including a tab leg that is connected to the sidewall at one end of the tab leg, and that projects outwardly from the sidewall, and a tab foot extending from the tab leg and curving in a direction that is toward a plane extending perpendicular to the central longitudinal axis through the one end of the tab leg, and away from a hole in the sidewall created by the tab being punched out of the sidewall, wherein the hole is defined by a base side and a top side, the base side has a greater length than the top side, and the tab leg the extends from the base side.

A wind turbine foundation comprising a concrete support slab having a horizontal rebar grid therein, a concrete pedestal integral with the support slab and having vertical post tensioning elements therein and a plurality of concrete ribs on top of and integral with the support slab and integral with the pedestal, the ribs having rebar therein and extend outwardly from the pedestal, the pedestal, slab and ribs are connected to each other to form a monolithic foundation. The foundation design reduces the weight and volume of materials used, reduces cost, and improves heat dissipation conditions during construction by having a small ratio of concrete mass to surface area thus eliminating the risk of thermal cracking due to heat of hydration.

A steel-fiber reinforced polymer (FRP) composite material reinforced concrete column comprises an inner steel pipe arranged in the center, wherein the inner steel pipe is internally provided with an unbonded steel strand; the outside of the inner steel pipe is provided with an outer steel pipe, concrete is poured between the inner steel pipe and the outer steel pipe, a plurality of additional small steel pipes are evenly arranged outside the outer steel pipe, and each of the additional small steel pipes is internally provided with an additional unbonded steel strand. A composite bar cage coaxial with the outer steel pipe and arranged on the outside thereof is also provided, wherein both the outer steel pipe and the composite bar cage are covered by high-ductility concrete, and at a core area, the outside of the high-ductility concrete is wrapped with an anti-spalling layer.