Service Doors/Heavy Duty
The Heavy Service Duty door provides high security
and durability offering years of maintenance free performance. Many options are offered with this model from perforated slat to the inclusion of a pass door or grille section.
All doors are designed to withstand up to 80 mph winds and can be upgraded for more severe weather conditions. Curtains can be ordered in standard grey or in tan with contrasting black guides and footpiece.
A galvanized steel finish is also offered providing the look and protection of stainless steel without the cost.
Heavy Duty Steel Roll-up Service Door Features
* Steel Angel Guides
* Steel Angel Footpiece
* 22 gauge steel curtain up to 16' wide - gauge upgrade available
* 24 gauge hood - upgrades of gauge available
* Designed to withstand 20PSF or 80MPH winds
Heavy Duty Steal Coiling Service Door Options
Increased Windload Capacity: curtain designs to withstand windloads exceeding 20PSF
High Cycle Construction: designs to provide up to 150,000 operating cycles or maximum possible in design
Perforated Slats: 3/64" diameter holes on 5/64" staggered centers in type 25 slats provide 30% open area for ventilation and visibility throughout the curtain
Extruded Aluminum Curtain Type 24ET: Optional thick-line, 11 gage extruded aluminum slat for exceptional corrosion resistance, durability, strength, and beauty. Available in standard mill finish or optional anodized clear or bronze for architectural needs.
Extruded Aluminum Curtain Type 24ES: Optional slim-line, 15 gage extruded aluminum slat for exceptional corrosion resistance, durability, and beauty. Lightweight design for use on service doors up to 16; wide. Available in standard mill finish or optional anodized clear or bronze for architectural needs.
Vision Lites: single or multiple 3" wide cutouts, open for ventilation or covered with acrylic
Intermediate Grille: partial grille curtain connecting type 30 slats above and below
Sloped or Stepped Footpiece: for special sill conditions
Cylinder Locks: on footpiece or guide
Pass Door: 3'-0" x 6'-8" holllow metal door in a steel frame for access through the curtain when closed; frame is hinged to guide and swings clear to allow use of entire door opening when curtain is raised;
handicap option, custom sizes, window and special hardware available
Galvanized Finish: on footpiece, guides, brackets and barrel
Safety Bearing: This unique safety device functions as both a bearing and inertia brake for motorized service doors and grilles. The safety bearing is designed to prevent the curtain from free-falling if there is damage to or failure of the motor operator, drive chain or spring assembly. If a malfunction occurs and the downward speed increases to an unsafe rate, the inertia brake absorbs the added energy and safely stops the load.
Powdercoat Finish: a durable and decorative finish for steel or aluminum surfaces. It provides longer life and requires less maintenance than a standard finish. Powder coating is available in a variety of colors for use on many products. Consult factory for color selection, applications and limitations.
Heavy Duty Steel Door Model Designations
By Method of Operation - Face of Wall Mount
DFP - Push-Up
DFC - Chain
DFT - Thru-wall chain
DFA - Awning Crank
DFB - Crank Box
DFM - Motor
For Between-Jamb Mount, change letter 'F' to 'J'.
Heavy Duty Steel Door Slat Options
Type 30 Large Curved Slat
Type 25 Large Flat Slat
Standard curved slat for use on all
service doors where strength and
durability are a consideration. Available
in 24, 22, 20, or 18 gage galvanized steel.
Also for use on all fire doors. 
Standard flat slat for use on all service doors where environmental conditions are a consideration. Available in 24, 22, 20, or 18 gage galvanized steel. Also for use on all fire doors, especially those requiring gasketing.
Type 20 Small Curved Slat
Type 18 Small Flat Slat
Optional curved slat for use on service
doors to 16' wide. Available in 22 or 20 gage galvanized steel. Also for use in fire doors
to 15' wide.
Optional flat slat for use on service doors to 16' wide. Available in 22 or 20 gage galvanized steel or 22 gage stainless steel. Also for use on fire doors to 15' wide, counter fire doors and counter doors.
Type 24ET Aluminum Extruded Slat
Type 24ES Aluminum Extruded Slat
Optional thick-line, 11 gage extruded aluminum
slat for exceptional corrosion resistance, durability, strength, and beauty. Available in standard
mill finish or optional anodized clear or bronze
for architectural needs.
Optional slim-line, 15 gage extruded aluminum slat for exceptional corrosion resistance, durability, and beauty. Lightweight design for use on service doors up to 16; wide. Available in standard mill finish or optional anodized clear or bronze for architectural needs.
Steel slats are galvanized per ASTM standards,treated for paint adhesion and pre-finished before forming with a prime coat and baked-on grey or tan polyester top coat.
Heavy Duty Service Door Mounting Details
Large Flat Slat # 25
Large Curved Slat # 30
HEAD ROOM REQUIREMENTS
Area Z" V"
A 20 16 3/4
B 22 17
C 23 1/2 18 1/2
D 25 1/2 20 1/2
E 29 1/2 24 1/2
F Consult Factory
Reduce 'Z' by 2" with top hood
flange turned down
SIDE ROOM REQUIREMENTS
Opening Width
'W'
Thru 15' 6 8
Over 15' Thru 24' 7 9
R/H chain operation as
shown - reverse 'X' & 'Y' for L/H
Heavy Duty Steel Rolling Service Doors
US. OVERHEAD DOOR CO., INC.
COMMERCIAL & RESIDENTIAL
Corporate Office: 972 Blossom Drive, Brentwood, CA 94513
San Francisco(415)222-6141 ● Hayward(510)481-1627 ● Brentwood Ph(926)516-1814 ● fax (925)516-1233 KITCHEN & BATH REMODEL DIVISION (925) 516-1649
email us: overheadco@yahoo.com
