Molding members for movable partition systems and header structures and components thereof, and related methods of installation

A molding member for a movable partition system including a track and a soffit along a lateral edge of the track, the molding member comprising:

• an at least substantially flat base portion having a first end and a second opposite end;
• an at least substantially flat back portion extending at least substantially perpendicular to the at least substantially flat base portion and connected to the first end of the at least substantially flat base portion;
• and
• a lever extending from proximate the at least substantially flat back portion toward the second opposite end of the at least substantially flat base portion, a portion of the lever configured to be proximate the second opposite end of the at least substantially flat base portion, the lever and the at least substantially flat base portion configured to exert a resilient force toward each other and to movably couple and grip the soffit of the movable partition system, such that the molding member grips the soffit when the molding member and the soffit move relative to one another;
• wherein the molding member is configured to abut the at least substantially flat back portion of the molding member against a wall of a building in which the movable partition system is to be installed, and to remain abutted against the wall without attaching or fastening the molding member to the wall.