| 摘要 |
A universal door frame for semitrailers, vans, and other large over the road cargo vehicles, provides a single frame configuration for use with either side hinged doors or an overhead door, as desired. The present door frame does not require the fabrication of different door frame configurations for each type of door, as is the case with prior art door frames. The present universal door frame is also formed of a relatively few components, requiring only a single component for each side post and a single component for the header of the frame. This saves considerable labor, and thus cost, over prior art frames in which the corresponding components are formed of a series of stock metal sections. The present universal door frame may also include a motor and spool installed within the header, for powered lifting of an overhead door installed with the present door frame.
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