[At the option of the Contractor, insulated steel doors and frames may be
provided in lieu of Grade I standard steel doors and frames. Door size(s),
design, and material shall be as specified for standard steel doors.]
Insulated steel doors shall have a core of polyurethane foam and an R
factor of 10.0 or more (based on a k value of 0.16); face sheets, edges,
and frames of galvanized steel not lighter than 0.7 mm thick 23 gage, 1.5
mm thick 16 gage, and 1.5 mm 16 gage respectively; magnetic
weatherstripping; nonremovable-pin hinges; thermal-break aluminum
threshold; and vinyl door bottom. Doors and frames shall receive phosphate
treatment, rust-inhibitive primer, and baked acrylic enamel finish. Doors
shall have been tested in accordance with ANSI A250.4 and shall have met
the requirements for Level C. Prepare doors to receive hardware specified
in Section 08710 DOOR HARDWARE. Doors shall be 44.5 mm 1 3/4 inches thick.
[Provide insulated steel doors and frames [at entrances to dwelling units]
[where shown] [_____].]
2.4
SOUND RATED STEEL DOORS
Doors shall be of the sound classification scheduled.
2.5
ACCESSORIES
2.5.1
Shelves for Dutch Doors
SDI 111-B. Fabricate shelves of steel not lighter than 1.5 mm thick 16 gage,
[[_____] mm inches wide] [of the size indicated]. Brackets shall be stock
type fabricated of the same metal used to fabricate shelves.
2.5.2
Louvers
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NOTE: Interior and exterior louvers are applied to
steel doors differently. Interior door louvers are
removable on side by molding flange and exterior
door louver frames are permanently welded to the
door and provided with removable bird screen or
insect screen.
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2.5.2.1
Interior Louvers
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NOTE: Lightproof louvers are used when light
transmission must be avoided. However, these
provide a minimal free air flow.
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SDI 111-C, Louvers shall be stationary [sightproof] [and lightproof] type
[where scheduled]. [Louvers for lightproof doors shall not transmit
light.] Detachable moldings on room or non security side of door; on
security side of door, moldings to be integral part of louver. Form louver
frames of 0.9 mm thick 20 gage steel and louver blades of a minimum 0.6 mm
24 gage. [Louvers for lightproof doors shall have minimum of 20 percent
net-free opening.] [Sightproof louvers to be inverted ["V" blade design
with minimum 55] [and] [inverted "Y" blade design with minimum40] percent
net-free opening.]
2.5.2.2
Exterior Louvers
Louvers shall be inverted ["Y"] ["V"] ["Z"] type with minimum of [30] [55]
SECTION 08110
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