GENERAL: Doors shall be S-24 Series as
manufactured by Mid-America Door Company.
RELATED WORK: Opening preparation, miscellaneous or
structural metal work, access panels, finish or field painting, are
in the scope of work or other trades.
DOOR SECTIONS: Sections will be 24 gauge steel and
have a nominal 2” thickness. Sections will have a tongue and groove
meeting rail to provide a weather tight seal between sections. Center
and end stiles will be 18 gauge steel formed, fastened, and bonded as
integral structures of the section.
TRACK: Galvanized steel track systems shall be 2"
or 3" depending on door size and will be bracket or angle mounted
depending upon application.
HARDWARE: Hinges and brackets to be made from galvanized
steel. Each roller shall have ¼" hardened steel balls per
roller (2”), or adequate for design requirements.
SPRING COUNTERBALANCE: Springs shall be oil tempered,
helical wound and stress relieved torsion type. Springs will be mounted
on a continuous cross header steel shaft supported by bearing brackets.
Long life springs of 25-50-100 thousand cycles may be specified and
are recommended for high usage doors. Cables are 7 x 19 strand galvanized
aircraft type with a minimum safety factor of 8 to 1.
FINISH: Paint will be baked on polyester coating.
WEATHER-STRIP: Bottom rail of section to include U'd
vinyl astragal held in place by retainer to provide additional reinforcement.
Additional weather-stripping available for full width of header and
jambs assisting in preventing air infiltration.
LOCK: Lock will be interior mount slide lock. (Optional
cylinder lock available)
VISION SECTIONS: Full section glazing can be provided
with mill finish aluminum frames and DSB glass to allow maximum light
or vision, or 25 x 5 vinyl frames, or rubber grommet glazes with DSB
glass.
INSULATION: Insulation may be specified for the S-24
series. Door sections shall be furnished with minumum 1½” thick
polystyrene insulation. Back covers shall be 26 gauge steel, or vinyl
backed.
