CPC E02D 5/526 (2013.01) [E02D 5/56 (2013.01); E02D 2600/20 (2013.01)] | 15 Claims |
1. A coupler comprising:
a first square tube including a first wall defining a first interior recess, a first pair of through holes, and a second pair of through holes, wherein the first interior recess extends through the first square tube, wherein the first interior recess is of a first inner width for receiving a square bar stock of a helical pile system;
a second square tube including a second wall defining a second interior recess, a third pair of through holes, and a fourth pair of through holes, wherein the second interior recess extends through the second square tube, wherein the second interior recess is of a second inner width for receiving the first square tube, the first square tube and the second square tube are a substantially similar length;
wherein the first square tube is received within the second interior recess and is affixed to the second square tube by a plug weld between the first square tube and the second square tube, the plug weld is located at or near a midpoint of a length of the first square tube and the second square tube, wherein the first pair of through holes and the third pair of through holes are aligned for receiving a first bolt; wherein the second pair of through holes and the fourth pair of through holes are aligned for receiving a second bolt, wherein the first pair of through holes and the second pair of through holes are disposed on a first face and a second face opposite to the first face, wherein the plug weld is on a face adjacent to the first face and the second face.
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