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Installation Guide

ManualsBrandsL.I.F Industries,Inc ManualsCommercial Doors36 in. x 84 in. Gray Flush Exit with 10 in. x 10 in. VL Left-Hand Fireproof Steel Commercial Door with Knockdown Frame
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PG.2
ROUGH OPENING
FOR WELDED FRAME
Rough opening size, Welded Frame (Masonry Wall): Take the nominal door width
and add 4 1/4" and the nominal door height and add 2 1/4". Keep in mind that on
a 36x80 door, the nominal measurements are 36" x 80" while the actual measurements
are 35- 3/4" x 79". Using a 36”x 80” door as an example, the rough opening size for a
welded frame would be 40- 1/4" x 82- 1/4". Since the standard face on a hollow metal
frame is 2", the outside dimensions of a 36x80 frame will be 40" x 82" so this RO
dimension will give you 1/4" of "play".
If you are installing a welded frame into a fire rated stud wall, remember that the drywall
will have to extend at least 1/2" into the frame so you cannot simply butt the drywall up
to the frame at fire rated openings. On non-rated openings you can run the drywall down
to the frame or caulk the seam if it is going into block.