[35] percent net-free opening. Weld or tenon louver blades to continuous
channel frame and weld assembly to door to form watertight assembly. Form
louvers of hot-dip galvanized steel of same gage as door facings. Louvers
shall have steel-framed [insect] [bird] screens secured to room side and
readily removable. Provide [aluminum wire cloth, 7 by 7 per 10 mm or 7 by
6 per 10 mm 18 by 18 or 18 by 16 inch mesh, for insect screens] [galvanized
steel, 13 by 13 mm 1/2 by 1/2 inch mesh hardware cloth, for bird screens].
Net-free louver area to be before screening.
2.5.3
Astragals
For pairs of exterior steel doors which will not have aluminum astragals or
removable mullions, as specified in Section 08710 DOOR HARDWARE, provide
overlapping steel astragals with the doors. [For interior pairs of [fire
rated] [and] [smoke control] doors, provide stainless steel astragals
complying with NFPA 80 for fire rated assemblies] [and] [NFPA 105 for smoke
control assemblies].
2.5.4
Moldings
Provide moldings around glass of interior and exterior doors and louvers of
interior doors. Provide nonremovable moldings on outside of exterior doors
and on corridor side of interior doors. Other moldings may be stationary
or removable. Secure inside moldings to stationary moldings, or provide
snap-on moldings. Muntins shall interlock at intersections and shall be
fitted and welded to stationary moldings.
2.6
INSULATION CORES
Insulated cores shall be of type specified, and provide an apparent
U-factor of .48 in accordance with SDI 113 and shall conform to:
a.
Rigid Polyurethane Foam: ASTM C 59/C 59M1, Type 1 or 2,
foamed-in-place or in board form, with oxygen index of not less
than 22 percent when tested in accordance with ASTM D 2863; or
b.
Rigid Polystyrene Foam Board:
ASTM C 578, Type I or II; or
c.
Mineral board:
ASTM C 612, Type I.
2.7
STANDARD STEEL FRAMES
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NOTE: Designate whether frames are to be welded or
knock-down field-assembled type. Welded frames must
be built in. Slip-on drywall frames must be
knock-down type. When both types are required for
the project, modify paragraph to specify both types
and locations where required.
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SDI A250.8, except as otherwise specified. Form frames to sizes and shapes
indicated, with [welded corners] [or] [knock-down field-assembled corners].
Provide steel frames for doors, [transoms,] [sidelights,] [mullions,]
[cased openings,] [and] [interior glazed panels,] unless otherwise
indicated.
SECTION 08110
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