| 摘要 |
The invention is a prefabricated door assembly for installation in a rough-i n door frame. The assembly includes a pair of vertically extending door jambs having inter - engaging casings and a header unit spanning the upper ends of the door jambs. The header unit includes a header board or jamb having inter-engaging horizontal casings. Both horizontal and vertical casings have pin nails protruding from their tongue portions which engage the jambs lightly during transport and installation prior to final nailing in place. The assembly als o includes L-shaped brackets affixed to the upper outer corners which join and fasten the vertic al and horizontal jambs together. The assembly may be packaged as a kit, which may include hinges, shins and/or shimming hardware.
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