Box roof roof beam convenient to drainage

The utility model relates to a box roof roof beam convenient to drainage installs between the wallboard and roof in box room, and for the deformed channel steel of horizontal installation, the box room of its notch orientation is inboard, and the last ledge in groove is longer than lower ledge, and its tip is buckled and is formed sunken tye, and the tye is close to box room inboard following than outside height, and follow on the tip wall that supports the roof in box room and rather than welded fastening the inboard, the tip of the lower ledge of deformed channel steel is also upwards buckled, forms to articulate the hem with wallboard outside wall and the fixed =-shaped of top plane subsides fastening. The utility model discloses simple structure, the preparation is convenient, has improved the back timber structure in box room, when guaranteeing the intensity of box roof roof beam own, more is favorable to the drainage, ingenious solution the drainage difficult problem in box room.