| CPC F16B 7/182 (2013.01) [E04H 9/14 (2013.01); E04H 9/027 (2013.01); Y02A 50/00 (2018.01)] | 24 Claims |

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1. A coupler, comprising:
a) a single body having a first end and a second end;
b) the single body including a first hole extending from the first end and a second hole extending from the second end, the first hole including a side wall, the first hole for receiving an end portion of a first rod and the second hole for receiving an end portion of a second rod;
c) the single body including a longitudinal first cutout extending into the side wall to expose the end portion of the first rod to be welded to the single body, the single body being single before the first rod to be welded is inserted into the first hole; and
d) the first cutout including a longitudinal first side wall surface and a longitudinal second side wall surface, the first side wall surface being transverse to the second side wall surface.
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