Patent ID: 6895714

Claim:
A mounting assembly for mounting a movable door panel at an opening of an enclosure between opposite walls of the enclosure, comprising: a horizontal header rail mountable at the opening above the door panel; an adjustable header expansion assembly having a shaft extending longitudinally relative to the rail and a nut in threaded engagement with the shaft, said nut disposed within the header rail such that the shaft and nut can be rotated relative to one another to expand the header expansion assembly and increase the length of the header rail for mounting the header rail to the enclosure by opposing compressive forces acting on the walls; and a curb rail having two rails positioned at opposite ends of a curb expansion assembly for mounting the curb rail to the enclosure beneath the header rail, wherein the curb expansion assembly has a curb shaft and a curb nut in threaded engagement and coupled to the curb rail.