Fire resistive joint cover system

A joint cover system operable to span a gap between two building members, each building member including a planar first side surface and a planar end surface, wherein the end surface of the first building member faces and intersects the first side surface of the second building member, the joint cover system comprising:

• a first base member positioned on the first side surface of the first building member, the first base member including a lower wall and a spaced-apart upper wall, such that the lower wall is coupled to the first side surface of the first building member;
• a second base member positioned on the first side surface of the second building member, the second base member including a lower wall and a spaced-apart upper wall, such that the lower wall is coupled to the first side surface of the second building member, wherein the lower wall and upper wall of the second base member are oriented at a right angle with respect to the lower wall and upper wall of the first base member;
• an intumescent sheet with a first edge positioned between the first base member and the first side surface of the first building member and a second edge positioned on the first side surface of the second building member;
• a first fastener penetrating a portion of the first base member, the first edge of the intumescent sheet, and the first side surface of the first building member;
• a second fastener penetrating a portion of the second base member and the first side surface of the second building member;
• and
• a third fastener penetrating the second edge of the intumescent sheet and the first side surface of the second building member.