Method of attaching a hanger to a deck

A method of attaching a hanger to the underside of a metal decking said method comprising:

• providing the hanger and the decking, where the hanger includes a body having an adjustable length between a first end and a second end, where said first end includes surfaces which intersect at an acute angle to form an edge, where the edge is perpendicular to the length of the body, where the metal decking has a depth extending between upper flutes and lower flutes, and ribs each connecting one upper flute to one lower flute, and where the metal decking includes at least one downwards facing trough including a first upper flute, and a first rib having a first surface including a first groove generally parallel to a length of the metal decking and a second rib having a second surface including a second groove generally parallel to the length of the metal decking, where the first rib and second rib are each attached to the first upper flute, and where said first groove is facing said second groove,
• contacting the edge of the first end of the body with the first groove of the first rib of the metal decking;
• contacting the second end of the body with the second groove of the second rib of the metal decking;
• and
• increasing an adjustable length of the body without piercing either the first groove of the first rib of the metal decking or the second groove of the second rib of the metal decking,
• such that the body between the edge of first end and the second end is in compression between the first surface of the first groove and the second surface of the second groove.