Jackson Lumber Catalog
Commercial Rough Opening & Handing
LUMBER & MILLWORK
Hollow Metal Frames: Knocked Down Drywall Frame
Width: Height:
Nominal Opening Size + 2" Nominal Opening Size + 1"
Welded Frame in Block or Concrete Wall 2" Head Height
Width: Height:
Nominal Opening Size + 4 3/8" Nominal Opening Size + 2 3/8"
4" Head Height
Width: Height:
Nominal Opening Size + 4 3/8" Nominal Opening Size + 4 3/8"
March 2018
131
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