The door system of the present invention includes a mounting frame assembly and a tilt-up door pivotally and slidably mounted within the mounting frame assembly. The door system is installed in a door rough opening as an integral unit, simplifying installation. At least one hydraulic cylinder is utilized to actuate the door between its open and closed positions. A stabilizer including a door component secured to the tilt-up door and a door component secured to the frame assembly are used to stabilize the door when it is in its open position.

The door system of the present invention includes a mounting frame assembly and a tilt-up door pivotally and slidably mounted within the mounting frame assembly. The door system is installed in a door rough opening as an integral unit, simplifying installation. At least one hydraulic cylinder is utilized to actuate the door between its open and closed positions. A stabilizer including a door component secured to the tilt-up door and a door component secured to the frame assembly are used to stabilize the door when it is in its open position.

A door operation system opens and closes an opening with a door. A drive unit mounted on the door and having at least one motor moves the door from the closed (C) position to the open (O) position and vice versa. An elongated transmission member extends along a side of the opening. The drive unit includes a driven transmission member in driving connection with the motor that is movably connected to the elongated transmission member and arranged to interplay with said elongated transmission member and to be driven along the elongated transmission member. The elongated transmission member at least partially wraps around the driven transmission member. At least one guide member with a sliding surface with a curvature is mounted to the door to interplay with the elongated transmission member to guide the elongated transmission member into contact with the driven transmission member. The elongated transmission member is configured to slide along the curvature to urge the elongated transmission member to flex and follow the curvature.