Ground screw adaptor for solar panel support structure
An adaptor for connecting a ground screw to an upright beam of a solar panel support assembly includes (a) a cylindrical connector having an open ground-screw receiving bottom end and a top end, the cylindrical connector having an inner circumferential surface with a diameter slightly larger than that of the ground screw and at least two sets of bolt holes, each set of bolt holes including at least three bolt holes uniformly distributed circumferentially about the cylindrical connector at an axial level, and the at least two sets of bolt holes being axially distanced from one another; (b) an intermediate plate having a top surface and a bottom surface fixed to the top end of the cylindrical connector; and (c) an upright beam connector fixed to the top surface of the intermediate plate and extending upward from the intermediate plate.
1. An adaptor for connecting a ground screw to an upright beam of a solar panel support assembly, comprising:
a cylindrical connector having an open ground-screw receiving bottom end and a top end, the cylindrical connector having an inner circumferential surface with a diameter larger by about ½ inch than that of a cylindrical top end of a ground screw and having at least two bolt hole sets, each bolt hole set including at least three bolt holes uniformly distributed circumferentially about the cylindrical connector at an axial level, and the at least two bolt hole sets being axially distanced from one another by an axial distance of at least 2 inches, and positioned to align with the cylindrical top end of the ground screw when the adaptor is installed in a telescoping fashion over the cylindrical top end of the ground screw;
an intermediate plate having a top surface and a bottom surface fixed to the top end of the cylindrical connector, wherein the bottom surface of the intermediate plate abuts a top surface of the cylindrical top end of the ground screw when the ground screw is inserted into the cylindrical connector; and
an upright beam connector fixed to the top surface of the intermediate plate, extending upward from the intermediate plate, and being configured to connect to an upright beam and retain the upright beam in a fixed direction;
wherein the axial distance causes a connection between the adaptor and the ground screw to have greater development length that enables adequate transfer of bending moments from the upright beam to the ground screw;
wherein the diameter of the inner circumferential surface of the cylindrical connector is sufficiently larger than an outer diameter of the cylindrical top end of the ground screw to permit gimballing and rotation between the cylindrical connector and the ground screw during installation; and
wherein the axial distance and the diameter of the inner circumferential surface of the cylindrical connector permit the at least two bolt hole sets to adjust a tilt direction of the upright beam connector when the adapter is secured to the ground screw.
2. The adaptor of claim 1 , wherein each bolt hole set includes three bolt holes distributed 120° apart about the circumference of the cylindrical connector.
3. The adaptor of claim 2 , wherein the axial distance between the at least two bolt hole sets is at least about 3 inches.
4. The adaptor of claim 3 , wherein the axial distance between the at least two bolt hole sets is at least about 5 inches.
5. The adaptor of claim 1 , wherein the upright beam connector includes a box-channel bracket including a plurality of bolt holes.
6. An adaptor for connecting an anchor to an upright beam of a racking assembly subject to upward forces, downward forces and moment forces, comprising:
a hollow connector having an open anchor receiving bottom end and a top end, the hollow connector having an inner surface that is shaped complementary to an outer surface of a top end of the anchor with dimensions larger by about ½ inch than that of the top end of the anchor so that the top end of the anchor may be received in the bottom end of the hollow connector in a telescoping fashion, and at least two bolt hole sets, each bolt hole set including at least three bolt holes distributed about a perimeter of the hollow connector at a level, and the at least two bolt hole sets being distanced from one another by a distance of at least 2 inches, and positioned to align with a continuous portion of the top end of the anchor when the adaptor is installed in a telescoping fashion over the top end of the anchor;
an intermediate base having a top surface and a bottom surface fixed to the top end of the hollow connector, wherein the bottom surface of the intermediate base abuts a top surface of the top end of the anchor when the anchor is inserted into the hollow connector; and
an upright beam connector extending upward from the intermediate base and being configured to connect to an upright beam and retain the upright beam in a fixed direction;
wherein the distance causes a connection between the adaptor and the anchor to have greater development length that enables adequate transfer of bending moments from the upright beam to the anchor;
wherein the inner surface of the hollow connector has dimensions that are sufficiently larger than outer dimensions of the top end of the anchor to permit gimballing between the hollow connector and the anchor during installation; and
wherein the distance and the dimensions of the inner surface of the hollow connecter permit the at least two bolt hole sets to adjust a tilt direction of the upright beam connector when the adapter is secured to the anchor.
7. The adaptor of claim 6 , wherein each bolt hole set includes three bolt holes uniformly distributed 120° apart about the perimeter of the hollow connector.
8. The adaptor of claim 7 , wherein the distance between the at least two bolt hole sets is at least about 3 inches.
9. The adaptor of claim 8 , wherein the distance between the at least two bolt hole sets is at least about 5 inches.
10. The adaptor of claim 6 , wherein the upright beam connector includes a box-channel bracket including a plurality of bolt holes.
11. The adaptor of claim 6 , wherein the distance between the at least two bolt hole sets is from about 3 inches to about 5 inches.