Method of installing a modular hinge

A method of installing a modular door hinge to a door system, the method comprising:

• assembling a first hinge portion to a second hinge portion using a first cover, wherein the first hinge portion comprises:
• two first leaves, each of the two first leaves comprising:
• a first web;
• and
• a first head with first teeth extending from the first web;
• and
• the first cover operatively coupled to the two first leaves;
• wherein the first cover has a first cover length that is greater than a first hinge length of the first hinge portion;
• and
• wherein the second hinge portion comprises:
• two second leaves, each of the two second leaves comprising:
• a second web;
• and
• a second head with second teeth extending from the second web;
• and
• a second cover operatively coupled to the two second leaves;
• wherein the second cover has a second cover length that is less than a second hinge length of the second hinge portion;
• and
• wherein the first hinge portion is operatively coupled to the second hinge portion by operatively coupling a portion of the first cover to the two second leaves such that the portion of the first cover extends over the second head of each of the two second leaves;
• assembling one of the two first leaves and one of the two second leaves to a door frame;
• and
• assembling another of the two first leaves and another of the two second leaves to a door.