Node, apparatus, system and method regarding a frame support for solar mirrors
A node for a solar frame including an elongate portion having a channel extending through it in which a structural element is disposed or a solid elongate portion on to which a structural element is disposed. The node comprises a fin extending radially outward from the elongate portion where at least 5% of the volume of the fin is replaced by at least a single void extending essentially in parallel with the channel or the extrusion direction of the solid elongate portion. An apparatus for transmitting torque in a solar frame having structural elements and a support. A system for solar mirrors. A node for a solar frame. A method for connecting a structural element with a strut having a strut end piece of a solar mirror support frame. A method for producing a node for solar mirror frame.
1. A node for a solar frame comprising:
an elongate portion having ends and having a fastener hole at each end and to which structural elements are attached with fasteners to the elongate portion at either end and which extend from either end in alignment with the elongate portion's central axis; and
a plurality of fins, each fin to which a strut end piece of a strut is attached having a rectangular shape with a variable thickness extending radially outward from the elongate portion, the fin supporting at least 200 lbs. of load, the elongate portion and the fins having a circle diameter of less than 12 inches and having an extrusion weight of less than 12 lbs./ft., each fin having a maximum deflection of less than 0.100″ and maximum equivalent stress of less than 21 ksi for loads of 750 lbs. normal to the fin and 1300 lbs. along the fin's axis, all force vectors through the fins from the strut end pieces attached to the fins converge at a common point within the elongate portion, the ends of the elongate portion extending beyond the fin's ends.
2. The node as described in claim 1 wherein the elongate portion is solid.
3. The node as described in claim 2 wherein the elongate portion has a rectangular cross section.
4. A node for a solar frame comprising:
a solid elongate portion having ends and having fastener holes at either end to which a structural element is attached with fasteners to the elongate portion at either end and which extend from either end in alignment with the elongate portion's central axis, the ends of the elongate portion extending beyond the fin's ends; and
a plurality of fins, each fin extending outward from the elongate portion, each fin to which a strut end piece of a strut is attached, the elongate portion and the fins having a circle diameter of less than 12 inches, each fin supporting at least 200 lbs. of load, the elongate portion and the fins having an extrusion weight of less than 12 lbs./ft., each fin having a maximum deflection of less than 0.100″ and maximum equivalent stress of less than 21 ksi for loads of 750 lbs. normal to the fin and 1300 lbs. along the fin's axis.
5. The node of claim 4 wherein all force vectors through the fins from the strut end pieces attached to the fins converge at a common point within the elongate portion.