Pipe racks

A structure comprising:

• at least one foundation defining an aperture on an upper surface of the at least one foundation;
• two legs, one of the two legs being supported by the at least one foundation, a lower surface of each of the two legs defining at least one aperture;
• a horizontal support having two ends, a first end disposed in an aperture defined in a first leg of the two legs and a second end of the horizontal support disposed in an aperture defined in a second leg of the two legs;
• a first rod forming a joint between the at least one foundation and one of the two legs, the first rod disposed in the aperture in the upper surface of the at least one foundation and in the aperture defined by the lower surface of said one of the two legs;
• a second rod disposed within the aperture defined in the lower surface of one of the two legs, wherein the second rod defines a hollow space and receives the first rod within the hollow space;
• and
• a passage defined through a side of the one of the two legs and through a hole in the second rod, the passage being threaded such that a distal end of a threaded bolt can be advanced into the passage to contact a side of the first rod within the hollow space of the second rod and move the first rod relative to the second rod.