Doors built the old fashioned way - with Quality

1-800-364-3667

1001 West Hartford Avenue

Ponca City, OK 74601

SN-24 Series

The SN-24 Series offers nominal 24 gauge steel on the exterior, 26 gauge steel or vinyl on the interior, with optional money-saving, highly effective insulation in between. The SN-24 Series is also available with windows and Full View.

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Standards

• REVERSE ANGLE: Door overlaps jamb approximately 1" against continuous angle of track support system (angle foot toward door). May be used with wood or steel jambs. The door closes against the base flange of the continuous angle.
• BRACKET MOUNTED TRACK: Use with wood or steel jambs. Door closes against stop molding.
• GENERAL: Doors shall be SN-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 25 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, 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 SN-24 series. Door sections shall be furnished with minumum 1½” thick polystyrene insulation. Back covers shall be 26 gauge steel, or vinyl backed.

Panel & Sections

Panels Wide		Sections High
Width	Number of Panels	Height	Number of Sections
Thru 9'2"	1	Thru 8'0"	4
9'3" to 12'2"	2	8'3 to 10'	5
12'3" to 16'2"	3	10'3" to 12'	6
16'3" to 20'2"	4	12'3" to 14'	7
20'3" to 24'2"	5	14'3" to 16'	8

Clearance and Mounting Requirements

	Clear Headroom		Sideroom		Depth Into Room		Centerline of Springs
	2" Track	3" Track	2" Track	3" Track	2" & 3" Track		2" Track	3" Track
Standard Lift Manual 12"	12½"	21"	4½"	5½"	Door Height + 18"		Door Height + 13½"	Door Height + 15½"
Standard Lift Motor Operated	19"	22½"			Door Height + 66"
Standard Lift Manual 15"	16½"	21"	4½"	5½"	Door Height + 18"		Door Height + 13½"	Door Height + 15½"
Standard Lift Motor Operated	19"	22½"			Door Height + 66"
High Lift Manual	High Lift + 12"		4½"	5½"	Door Height Less Lift + 30"		Door Height + Lift + 6½"	Door Height + Lift + 7½"
High Lift Motor Operated	High Lift + 12"		24" One Side		Door Height Less Lift + 30"
Vertical Lift Manual	Door Height + 8"		4½"	5½"	18"		Double Door Height + 2"
Vertical Lift Motor Operated			24" One Side		18"
Low Headroom Manual	6½"	11"	6"	9"	Door Height + 30"		Does Not Apply
Low Headroom Motor Operated	9"	13½"			Door Height + 30"

Headroom Selection

The SN-24 Series is available with several headroom configurations to help fit your site requirements.

Optional Insulation

The SN-24 Series offers optional insulation. Minimum 1½" thick polystyrene with 26 gauge steel or vinyl backing increases the energy efficiency of your door.