Therma-Tru Multi-Family Pre-Hung - Manual (Page 8)

Door Construction Detail
8
Security
Therma-Tru now offers added security with new impact
rated products, including opaque fiberglass impact
rated doors and new impact rated glass, available with
either our new lip-lite frame or flush-glazed into the
door panel. Therma-Tru impact rated products provide
safety and security against burglary and forced entry.
Fire Rating
All of our fire-rated steel doors offer
additional security with up to a 90-minute
positive pressure fire rating available and
certified by Warnock Hersey. A 20-minute
smoke rating and the option of a triple bore is
also available.
www.thermatru.com
Advanced Lock Reinforcing
Latching and deadlocking hardware is supported
with an advanced injection-molded composite lock
reinforcement with superior screw-holding power.
Advanced door avoids the problem of “telegraphing”
of the lock reinforcement typical with
wood blocks. Design also allows
for uniform foam flow for a flatter
door face at lock area.
Lock Machining
Lock preparations include 2 1 /
8
"
face bores at both 2 3 /
4
" and 2 3 /
8
"
backsets. Edge preps for cylindrical
preps shall feature 1
1 /
8
" x 2 1 /
4
".
Deadlock edge prep located at multiple center options
to latching edge prep. Deadlock cross bore optional.
Mortise lock preps available for card reader and other
commercial applications.
Heavy Duty
Steel face sheets will be 24-gauge,
galvanized tension-leveled steel for superior
flatness and enhanced corrosion resistance.
22-gauge steel face sheets optional on
Therma-Tru pre-hung units for added
strength and durability.
Rugged Construction
The door edges will be mechanically overlapped the
full height on both sides of door and adhered with
foamed-in-place polyurethane. The door will be
stiffened with integrally-formed top and bottom rails
securely welded at the top and bottom of door with
two welds each.
Insulated
Doors will be foamed-in-place, stiffened and
structurally reinforced with environmentally friendly
polyurethane at a density of 2 lbs/ft
3 . The insulating
value of the core will be R-11.
Hinge Prep
Door will have 4" high template hinge preps
machined, reinforced for secure anchoring of
hinges as follows:
• Standard Pre-Hung –18 gauge plate
reinforcements to receive 10-24 screws.
• 12-24 TR Series –10 gauge plates tapped
to receive 12-24 screws.
• ProEdge ™ Adjustable Hinge –16 gauge
plates countersunk, extruded and tapped
to 10 gauge equivalent to receive
10-24 screws.
Performance
Screw-applied bottom sweep for
enhanced water and air infiltration
resistance.
Paint Finish
Doors will come with a factory
prime finish for added rust
inhibition. Primed surface will be
suitable for maximum adhesion of
finish top coat.