| 摘要 |
Metal cladding as jamb cover assemblies and mullion cover assemblies, f or door frames and mullions, using extrusions as cladding over substrates. A ja mb cover assembly includes a jamb plate, a nosing, and a nailing fin. The naili ng fin extends from a distal side of the assembly. Accordingly, the frame can be secured in a rough opening of a building with the nosing assembled to the jamb plate , and using the nailing fin for the securement, without any assembly or disassembl y of the frame at the construction site. Regarding the mullion cover assembly, first and second jamb plates are on opposing sides of a mullion substrate. A mullion nosing is assembled to the jamb plates, and bridges the jamb plates to join togethe r the two jamb plates and tire nosing, to provide complete overlayment of the outer surface of the mullion substrate and to space the front panel of the nosing from the outer surface of the substrate.
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