Cantilevered expansion finger joint apparatus

An expansion joint apparatus comprising one or more finger joints with each finger joint comprising

• a) a support for anchoring to a surface of a supporting structure;
• b) a finger unit comprising a finger unit body and one or more fingers extending from a distal end of the finger unit body;
• c) a pivot mechanism pivotally coupling the finger unit to the support and allowing rotation about a pivot axis on a sliding plane parallel to a top surface of the support, and comprising a pivot bore extending through the finger unit body along the pivot axis;
• and
• d) a cantilever mechanism contacting the finger unit to provide cantilever support to the one or more fingers, wherein rotation within the sliding plane is allowed but rotation out of the sliding plane is prevented, and comprising a rigid collar slidably seated in the pivot bore and fastened to the support such that the finger unit is rotatable relative to the collar about the pivot axis but fixed relative to the collar about any other axis.