This Online Learning Seminar is
available through a professional
courtesy provided by:
Commercial Upward-Acting Sectional Doors
Clopay Corporation
8585 Duke Blvd
Mason, OH 45040
Tel: 800-282-2260
Fax: 513-770-3519
Email: [email protected]
Web: www.clopay.com
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© 2004 Clopay Building Products. The material contained in this course was researched, assembled, and
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content of this course should be directed to the program instructor.
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Slide 1 of 67
• About the Instructor
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Commercial Upward-Acting Sectional Doors
Commercial Upward-Acting Sectional Doors
Presented By:
Clopay Corporation
8585 Duke Blvd.
Mason, OH 45040
Description:
Provides an overview of commercial upward-acting sectional
doors, including conventional ribbed-steel doors, insulated
thermally-broken doors and full-view doors, their
characteristics and benefits, as well as various mounting,
track and opener options available on the market.
AIA/CES Info:
Provider No. J624 – Course No. AEC015; LUs – 1.25
MCE Info:
Contact your respective governmental licensing & regulatory
agency. This program qualifies for HSW credit.
Expiration date:
May 15, 2005
This program is registered with AIA/CES for continuing professional registration. As such, it does not include content that may be deemed
or construed to be an approval or endorsement by the AIA or AEC Daily Corporation of any material or construction or any method or
manner of handling, using, distributing or dealing in any material or product. Questions related to specific materials, methods and
services should be directed to the program instructor.
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Slide 2 of 67
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Commercial Upward-Acting Sectional Doors
How to use this Online Learning Course
•
Read and review the material contained in this seminar.
•
Each slide may contain additional Instructor comments. To view these comments,
double-click on the
icon. Then, click on the comment window to scroll
through the text.
•
To view this presentation, use the previous/next keys on each slide or the up and
down arrow keys on your keyboard.
•
Within this course is a code word that you will be required to enter in order to
proceed with the online examination. Please be sure to write down this code
word so that you have it available for the test.
•
To receive a certificate indicating course completion, refer to the instructions at
the end of the seminar.
•
For additional information and post-seminar assistance, click on any of the logos
and icons within a page or any of the links at the top of each page.
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Slide 3 of 67
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Commercial Upward-Acting Sectional Doors
Learning Objectives
Upon completing this course, you will have a better understanding of:
• The advantages and disadvantages of various types of commercial doors
• Typical uses and applications for upward-acting sectional doors
•
The basic components and types of upward-acting sectional doors
•
Options for customizing sectional doors for specific requirements
•
Safety features and wind load requirements for sectional doors
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Slide 4 of 67
• About the Instructor
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Commercial Upward-Acting Sectional Doors
Commercial Doors
There are five basic types of commercial doors:
•
Swinging Doors
•
Sliding Doors
•
Rolling Doors
•
Bi-fold Doors
•
Sectional Doors
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Slide 5 of 67
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Commercial Upward-Acting Sectional Doors
Commercial Doors
• Swinging Doors
– Swinging doors are primarily used to allow the passage of people
and small objects through openings less than 50 sq. ft.
• Sliding Doors
– Sliding doors can be used for a variety of applications, however they
tend to be heavy and require the use of horizontal tracks and rollers
to help move the doors from side to side.
• Bi-fold Doors
– Bi-fold doors are typically used on very large openings. These doors
raise from the bottom and fold horizontally in the center of the
door. They typically do not use a counterbalance mechanism and are
lifted using cables and motors.
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Slide 6 of 67
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Commercial Upward-Acting Sectional Doors
Commercial Doors
• Rolling Doors
– Rolling doors are typically made of narrow (3”- 4”) slats that roll
upward into a drum over the opening. Some rolling doors are made
of 24” sheet metal that is interlocked to create a continuous sheet
that rolls up above the opening. These doors use springs to provide
counterbalance to help “lift” the doors out of the opening.
• Sectional Doors
– Also called overhead doors, sectional doors are typically divided
into a number of sections, each 24” high or less. These doors are
upward-acting and are balanced throughout the path of door travel.
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Slide 7 of 67
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Commercial Upward-Acting Sectional Doors
Commercial Door Selection Guide
Type of Door
Swinging
Sliding
Rolling
Bi-Fold
Sectional
Swings on
hinges
Rolls side to side
using tracks and
rollers
Rolls upward into a
drum using guides
and springs for
counterbalance
Moves upward and
folds horizontally,
generally motor
operated
Upward-acting,
using tracks and
rollers with springs
for counterbalance
Advantages
Quick, smooth
operation
Economical, easily
matches building
exterior
Durable, versatile
enough to handle
most opening sizes
Versatile enough to
economically handle
large openings
Economical,
durable, adaptable,
many insulation and
window options
Disadvantages
Somewhat
limited by size
and space
requirements
Can be heavy,
more dangerous
to motor operate,
needs routine
maintenance
Initial cost and
maintenance costs
are generally higher,
not as much
flexibility for design
applications
Maintenance is more
costly, relies on
motors and cables for
operation, requires
space inside the
building for operation
Limited slightly by
size requirements,
more prone to wear
due to additional
moving parts
Operation
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Slide 8 of 67
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Commercial Upward-Acting Sectional Doors
Why Choose a Sectional Door?
Why select a sectional door over another type of commercial door?
• Versatility
– There are sectional doors to suit a variety of applications in terms of
both appearance and functionality. Special applications are more
easily accommodated than with other types of doors.
• Durability
– Sectional doors are typically built of steel, wood, or aluminum and
can withstand a variety of opening and closing requirements, as well
as different climatic situations.
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Slide 9 of 67
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Commercial Upward-Acting Sectional Doors
Why Choose a Sectional Door?
Why select a sectional door over another type of commercial door?
• Ease of Operation
– Sectional doors employ a counterbalance system that facilitates
opening and closing and makes them easier to operate than sliding
doors. Many sectional doors are also available with electric motors.
• Cost & Maintenance
– In most cases, sectional doors are more economical. Their initial cost,
as well as the cost of installation and replacement parts, tends to be
lower than other types of commercial doors. In addition, sectional
doors can be insulated to help prevent energy loss and reduce costs.
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Slide 10 of 67
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Commercial Upward-Acting Sectional Doors
Sectional Door Basics
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Slide 11 of 67
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Commercial Upward-Acting Sectional Doors
Sectional Door Basics
Typical Uses & Applications
•
•
•
•
•
•
•
•
•
Commercial Buildings
Industrial Buildings
Institutional Buildings
Government Facilities
Factories/Warehouses
Distribution Facilities
Service Stations
Fire & Municipal Buildings
Any other buildings requiring
access larger than a typical
walk-through door system
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Slide 12 of 67
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Commercial Upward-Acting Sectional Doors
Sectional Door Basics
Basic Terms
•
Window Lite
–
•
Sections
–
•
Steel panels reinforced with stiles interconnected
with hinges and rollers
Bottom Bracket
–
•
Glazed section with various types of glass or clear
acrylic to allow for light and visibility
A structured support that provides a point of
attachment for lifting cables
Cable Drum
–
Grooved drums on the torsion spring shaft that
lifting cables wind around when door is opening
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Slide 13 of 67
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Commercial Upward-Acting Sectional Doors
Sectional Door Basics
Basic Terms Cont’d…
•
Torsion Springs
–
•
Extension
–
•
Extends along both horizontal tracks
Rear Hanger Track
–
•
Provide the means to raise and lower the door
via cable winding on drums
Often constructed of punched angle iron, laterally
braced, these hangers attach the end of the
horizontal track to the ceiling
Track
–
Consists of vertical, radius, and horizontal
components, together which provide a guide for
the sections when the door is raised or lowered
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Slide 14 of 67
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Commercial Upward-Acting Sectional Doors
Sectional Door Basics
Critical Dimensions
Backroom
•
The required clearance from the face of the header to
any obstruction to the rear of the horizontal track
Headroom
•
A measurement from the top of the door opening
upward to the lowest building obstruction on the
inside of the header wall. Use this measurement for
vertical clearance all the way back to the end of the
horizontal track
Side Room
•
A horizontal measurement from each side of the
door opening outward along the wall to the nearest
obstruction within the building
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Slide 15 of 67
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Commercial Upward-Acting Sectional Doors
Sectional Door Basics
There are three basic types of sectional doors:
Conventional
Ribbed-Steel
Insulated ThermallyBroken Steel
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Full-Vision
Aluminum
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Slide 16 of 67
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Commercial Upward-Acting Sectional Doors
Conventional
Ribbed-Steel Doors
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Slide 17 of 67
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Commercial Upward-Acting Sectional Doors
Conventional Ribbed-Steel Doors
Introduction
Ribbed-steel doors are sometimes called “pan doors”
because they basically consist of a roll-formed hollow
steel pan.
These pans are typically reinforced with vertical stiles
that strengthen the section, making it more rigid and
more durable, and also providing a location for hinge
and reinforcing strut placement.
Ribbed-steel doors can be insulated by friction fitting
polystyrene or polyurethane foam into the open “pan”
between the stiles.
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Slide 18 of 67
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Commercial Upward-Acting Sectional Doors
Conventional Ribbed-Steel Doors
Typical Uses & Applications
•
•
•
•
•
•
•
•
•
Factories/Warehouses
Service Stations
Maintenance Buildings
Loading/Shipping Docks
Fire & Municipal Buildings
RV/Boat Storage Facilities
Trucking/Distribution Centers
Apartment Buildings/Condos
Any other buildings where
economy and durability are
required
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Slide 19 of 67
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Commercial Upward-Acting Sectional Doors
Conventional Ribbed-Steel Doors
Characteristics
The majority of conventional steel doors are made up of roll-formed steel sections
that form a 2” thick panel. The additional steel of the end stiles brings the thickness
of each section to 2-1/8”. End stiles are generally 18 or 16 gauge steel construction.
The outside of the panel can be a ribbed or flush design.
Door sections can be non-insulated or insulated using friction fit polystyrene or
urethane board type insulation. Sections are typically constructed from 25 gauge
(.019” minimum), 24 gauge (.023” minimum), 20 gauge (.034” minimum), or 16
gauge (.060” minimum) steel.
The best doors in this category use steel that is hot-dipped galvanized and prepainted inside and out, providing a durable, maintenance-free finish.
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Slide 20 of 67
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Commercial Upward-Acting Sectional Doors
Conventional Ribbed-Steel Doors
Characteristics Cont’d…
Stiles (the vertical supports in the sections) can
be attached to the roll-formed sections using
rivets, spot welds or proprietary joining systems.
This is an example of a proprietary joining
system, where two metals are joined together
without puncturing the metal or exposing bare
metal. This process allows manufacturers to
provide longer warranties against rust-through
by minimizing exposed metal surfaces.
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Slide 21 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Conventional Ribbed-Steel Doors
Materials & Finishes
Conventional ribbed-steel doors can be specified in 25, 24, and 20 gauge hot-dipped
galvanized ribbed steel or 16 gauge hot-dipped galvanized flush steel. Doors can be
insulated using polystyrene insulation with 24 or 30 gauge steel, hardboard, or vinyl
back covers. Steel gauge should always be specified by decimal thickness rather than
by gauge to ensure the supplier’s adherence to design criteria.
Many manufacturers uses a combination of minor and deep grooves on a smooth
steel face. These grooves give strength to the door as well as adding aesthetics. Some
manufacturers use a stucco or wood-grain finish on the steel to reduce the visibility
of minor scratches and dents that may occur during the life of the door. A white or
brown painted finish is offered as standard by most manufacturers and various
warranties against rust-through are available.
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Slide 22 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Conventional Ribbed-Steel Doors
Glazing
Glazing options for conventional ribbed-steel doors will vary by manufacturer.
Rectangular framed windows are available. Some manufacturers offer window lites
that are oval-shaped and are held in place using neoprene gaskets. However, there is
a trend to change these windows to a plastic frame and retainer.
Full-vision sections are aluminum sash sections, which provide more area for glass.
SSB and DSB window glass are typical options. Plexiglas, 1/4” wire glass, tempered or
1/2” insulated glass are also common options.
It is important to be aware of local building code requirements. Some local building
codes may dictate the minimum glass requirements for a particular application. For
example, there may be a minimum requirement for 1/8” tempered glass in a
particular location and for a particular application.
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Slide 23 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Conventional Ribbed-Steel Doors
These are some examples of the types of
windows that are typically available with
conventional ribbed-steel doors.
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Slide 24 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Conventional Ribbed-Steel Doors
Options: Pass Doors
•
For sectional doors that have a lot of
pedestrian traffic, a pass door option
is available on some models.
•
Pass doors are walk-through doors
that are built into the overhead
door, allowing for pedestrian travel
while the sectional door is closed,
without raising and lowering it.
•
There are restrictions on the size and
availability of this type of door.
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Slide 25 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Conventional Ribbed-Steel Doors
Options: Removable Mullions
•
For openings wider than standard door
width, consider using a carry-away, rollaway, or swing-up mullion that enables
the use of two or more doors to form
one larger “finished” opening
•
This type of application will require at
least 24” of headroom. This option may
afford more wind load resistance for
wider openings than if one very wide
door is used to fill the opening.
Removable Center Mullion
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Slide 26 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Conventional Ribbed-Steel Doors
Options: Locking Mechanisms
•
Doors are available with various
locking options, such as inside slide
locks or cylinder locks.
•
To prevent damage to doors with
electric openers, there should be an
electronic interlock switch that
prevents operation of the door
when the manual lock is engaged.
Be sure to specify electronic or mechanical interlock on all motor-operated doors!
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Slide 27 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Conventional Ribbed-Steel Doors
Practical Limitations
•
Conventional ribbed steel doors are available to satisfy size requirements of up to
28‘-2” in width and 24‘-0” in height.
•
Doors will typically satisfy a DASMA (Door & Access Systems Manufacturers
Association) standard wind load of 15 PSF or 65 MPH in the fully closed position,
however higher wind load requirements can be met.
•
Hardware and wind-resistance are not typically designed for doors with total
areas greater than 560 sq. ft.
Please remember the word HARDWARE. You will be required to enter it in order to
proceed with the online examination.
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Slide 28 of 67
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Commercial Upward-Acting Sectional Doors
Thermally-Broken
Insulated Steel Doors
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Slide 29 of 67
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Commercial Upward-Acting Sectional Doors
Insulated Thermally-Broken Steel Doors
Introduction
Insulated thermally-broken doors are designed for
applications requiring durable and energy-efficient
door systems. Insulated doors are usually formed using
a steel/insulation/steel sandwich type of construction
with a thermal break between the steel “skins” that
inhibits the transmission of heat or cold.
Thermally-broken doors incorporate many of the
features of conventional steel upward-acting doors, in
addition to higher installed “R” values. The sandwich
construction also provides the door with added
strength and durability.
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Slide 30 of 67
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Commercial Upward-Acting Sectional Doors
Insulated Thermally-Broken Steel Doors
Typical Uses & Applications
•
•
•
•
•
•
•
•
•
•
•
Factories/Warehouses
Service Stations
Maintenance Buildings
Loading/Shipping Docks
Fire & Municipal Buildings
RV/Boat Storage Facilities
Trucking/Distribution Centers
Recreational Facilities
Multipurpose Buildings
Cold-Storage Facilities
Any other facilities with energy
or temperature considerations
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Slide 31 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Insulated Thermally-Broken Steel Doors
Materials & Finishes
Insulated steel doors can be specified with 27 gauge
(.016” min), 25 gauge (.019” min), 24 gauge (.023” min)
or 20 gauge (.034” min.) hot-dipped galvanized steel.
The strength of the sandwich construction allows door
manufacturers to use lighter gauge steel to form the
door panels. Some manufacturers use 30 gauge (.010”
min.) steel for the insulating steel “skins”.
Insulated steel doors are available in standard white or
brown, with various rust-through and delamination
warranties available.
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Slide 32 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Insulated Thermally-Broken Steel Doors
Glazing
Insulated steel doors are available with
gasketed and framed lites or full-vision
sections. The sizes of available glazing
will vary by manufacturer. Available
glazing options include SSB, DSB,
Plexiglas, 1/4” wired-glass, tempered
glass, and 1/2” insulated glass.
Glazing options are similar to those
of conventional ribbed-steel doors,
however many thermally-broken doors
use screws to secure plastic window
frames.
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Slide 33 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Insulated Thermally-Broken Steel Doors
Options
Pass-Doors
•
Insulated doors are also available with passdoors that allow pedestrian traffic through
a closed sectional door
Removable Mullions
•
Removable mullions allow two or more
insulated doors to be combined to create
one larger “finished” insulated door
Locking Mechanisms
•
Both inside slide locks and outside cylinder
locks are available with insulated doors
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Slide 34 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Insulated Thermally-Broken Steel Doors
Practical Limitations
•
Insulated thermally-broken steel doors are available to satisfy size requirements
of up to 28‘-2” in width and 24‘-0” in height.
•
Doors will typically satisfy a DASMA (Door & Access Systems Manufacturers
Association) standard wind load of 15 PSF or 65 MPH in the fully closed position,
however higher wind load requirements can be met.
•
The sandwich construction of insulated steel doors results in added strength and
stability. For example, in wind load tests, a typical 2” thick sandwich door is twice
as durable as a 16 gauge steel “pan” door.
•
As with conventional ribbed steel doors, hardware and wind-resistance are not
typically designed for doors with total areas greater than 560 sq. ft.
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Slide 35 of 67
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Commercial Upward-Acting Sectional Doors
Full-View
Aluminum Doors
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Slide 36 of 67
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Commercial Upward-Acting Sectional Doors
Full-View Aluminum Doors
Introduction
Full-view aluminum doors are designed for
commercial, industrial, institutional, and
governmental facilities requiring a durable,
aesthetically pleasing door that allows for
high light transmission and visibility.
Sometimes referred to as service station
doors, full-view or full-vision doors typically
consist of aluminum frames with glass or
plastic window panels. The bottom sections
of these types of door are typically specified
as solid aluminum panels in order to provide
added safety and durability.
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Slide 37 of 67
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Commercial Upward-Acting Sectional Doors
Full-View Aluminum Doors
Typical Uses & Applications
•
•
•
•
•
•
•
•
•
•
Car Washes
Factories/Warehouses
Service Stations
Maintenance Buildings
Fire & Municipal Buildings
RV/Boat Storage Facilities
Recreational Facilities
Multipurpose Buildings
Airports
Any other facilities where light or
aesthetics are important, or where
corrosive environments exist
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Slide 38 of 67
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Commercial Upward-Acting Sectional Doors
Full-View Aluminum Doors
Additional Applications
Full-view aluminum doors are
especially suited to exterior and
interior “partitioned” applications.
In restaurants, for example, fullview doors are often used with
great success. The door can function
as a “window wall” in inclement
weather or can be raised when the
weather is nice, to create an open
air atmosphere or provide access to
an outdoor patio.
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Slide 39 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Full-View Aluminum Doors
Materials & Finishes
Full-view doors are typically constructed using lightweight anodized aluminum
frames in order to provide durability and longevity. Alloys 6063-T5 and 6063-T6 are
commonly used because of their tensile strength and ability to be extruded.
Some full-view doors incorporate rails with built-in reinforcing fins or struts. This
modification is preferable because the fins provide the door with added strength
against wind loads.
Full-view doors are available in a variety of finishes, which can be achieved by color
anodizing (e.g. bronze anodized) or through the application of custom paint colors.
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Slide 40 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Full-View Aluminum Doors
Glazing
Full-view aluminum doors are
available with a variety of full-vision
sections.
Available glazing options include
DSB, Plexiglas, 1/4” wired-glass,
tempered glass, and 1/2” insulated
glass.
The construction of the glass panels
is similar to the full vision sections
that are used with steel doors.
Remember to refer to local code requirements for glazing limitations!
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Slide 41 of 67
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Commercial Upward-Acting Sectional Doors
Specifying Full-View Aluminum Doors
Practical Limitations
•
Full-view doors are available to satisfy size
requirements of up to 24‘-2” in width and
24‘-0” in height, although there may be
some restrictions in glazing material
depending on the size of the door.
•
Doors will typically satisfy a DASMA
(Door & Access Systems Manufacturers
Association) standard wind load of 15 PSF
or 65 MPH in the fully closed position,
however higher wind load requirements
can be met.
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Slide 42 of 67
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• Seminar Discussion Forum
Commercial Upward-Acting Sectional Doors
Upward-Acting
Sectional Door Options
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Slide 43 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Mounting Options
Sectional doors can be mounted on either steel, wood or masonry jambs.
It is important to understand the jamb conditions for the job application!
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Slide 44 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Wood Door Jambs
When sectional doors are mounted to
wood jambs, the door is typically ordered
in the same size as the finished opening.
This allows attachment of the track with
either jamb brackets or continuous angles
with a “leg out” configuration as shown.
This provides a good point of attachment
to the construction material, and also
allows the use of a typical lag screw for
jamb attachment. The door stop mold
seals the door against air infiltration.
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Slide 45 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Steel Door Jambs
With steel door jambs, there is usually
less surface available to mount the
vertical mounting angle. The angle is
typically welded or bolted to the steel
jamb with a “leg in” configuration as
shown.
Because this sets the track into the
opening further, doors are typically
ordered 2” wider than the actual
opening. This allows the door jamb to
actually form part of the weather seal.
Additional jamb seal can be applied to
the vertical track mounting angle.
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Slide 46 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Track Options
Depending upon the headroom
available, the upper portion of the
track can be specified in one of
following five basic configurations:
•
•
•
•
•
Standard Headroom
Low Headroom
Vertical Lift
High Lift
Follow-the-Roof
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Slide 47 of 67
• About the Sponsor
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Standard Headroom
Standard radius track is the typical
installation of the upward acting
sectional door.
Commercial doors employ track
with a 15” radius, which requires
16” of unobstructed headroom.
If the available headroom is less
than 16”, some manufacturers offer
12” radius horizontal track. This
reduces the required headroom to
approximately 14-1/2”.
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Slide 48 of 67
• About the Sponsor
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Low Headroom
Low headroom track options are
available for applications where
there is between 4-1/2” and 14-1/2”
of headroom available.
This application is functional, but
the door does not operate quite as
smoothly because the top section
does not roll into the radius track
at the same angle.
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Slide 49 of 67
• About the Sponsor
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
High Lift
In applications where there is ample
headroom, the horizontal track can
be raised to increase headroom in
the interior of the building.
This application enables the door to
pass between the wall and any
obstructions in the interior of the
building.
The counterbalance mechanism
requires 12” above the bottom of
the horizontal track, which means
the track will need to hang 12”
below the headroom ceiling.
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Slide 50 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Vertical Lift
If the available headroom is equal
to or greater than the height of the
sectional door, the track can be
positioned to allow the sectional
doors to be raised into a vertical lift
position.
This track option provides a clean
look on the interior of the building.
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Slide 51 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Follow-the-Roof
Follow-the-roof commercial track is a
combination high-lift and vertical-lift
track. It is typically used for buildings
with pitched roofs.
The door travels up the side of the wall
and back, following the pitch of the
roof. The building ceiling must be free
from obstructions to allow the door to
travel freely. Jackshaft motor operators
are available for this type of track.
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Slide 52 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Door Operators
Manual Operation
Sectional doors can be operated manually, however because of the height of the opening for
typical commercial applications, either a chain hoist or motor operation is recommended.
Chain Hoists
Chain hoists typically consist of a 3:1 reduced-drive. This gear reduction helps reduce the amount
of force required to raise the door. It also functions to slow the operation of the door, preventing
potential damage to the mechanism.
Motor Operators
Motor operators can be either trolley-type, which pulls and pushes the door open and closed, or
jackshaft-type, which actually rotates the counterbalance shaft assembly enabling the door to
move up and down. Trolley operators are typically used on standard lift type doors. Jackshaft
operators are used on doors which have a minimum of two feet of hi-lift or vertical lift.
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Slide 53 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Door Operators: Trolley
Trolley-type operators feature the motor
unit mounted between, above and to
the rear of the “L-rail” horizontal tracks.
The trolley drive provides continuous
contact with the door.
Trolley-type operators should be used
with standard lift or low headroom
doors. Typically, trolley operators require
an additional 4” of headroom space for
the operator motor and control box.
Multiple trolleys can be used for wider
doors.
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A typical trolley-type electric opener. These
openers can be either belt driven, as shown
here, or gear driven.
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Slide 54 of 67
• About the Instructor
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
Door Operators: Jackshaft
Jackshaft openers operate the door by rotating
the counterbalance shaft. These operators can
also be belt driven or gear driven.
Some openers are “universal”, meaning that they
can be mounted in any position, while others have
a drive shaft specifically designed for either righthanded or left-handed operation.
It is important to specify the mounting location
desired for the opener because there may be side
room or headroom restrictions imposed by the
various mounting positions of the opener.
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Jackshaft openers should only
be used in hi-lift or vertical lift
applications. Use on standard
lift applications may result in
door failure.
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Slide 55 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Options
High-Cycle Springs
Doors that will be operated many times
a day can be equipped with high-cycle
springs. This option involves using a
larger diameter spring wire, larger
diameter coils, and/or longer springs, in
order to increase the longevity of the
counterbalance mechanism.
Sectional door springs can be specified to
have a 10,000, 25,000, 50,000 or 100,000
cycle life. A cycle is defined as one
complete opening and closing of the
door. These springs tend to be difficult,
dangerous, and costly to repair.
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Slide 56 of 67
• About the Instructor
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Commercial Upward-Acting Sectional Doors
Upward-Acting
Sectional Door Safety
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Slide 57 of 67
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Commercial Upward-Acting Sectional Doors
Sectional Door Safety
Safety Drop Bottom Brackets
Safety drop brackets will stop a sectional door
from falling in the unlikely event of cable
failure. These safety drop bottom brackets are
available for high-lift and vertical lift doors
with either 2" or 3" track. Safety brackets are
not available for low headroom applications,
and are not recommended for standard lift
applications.
Slowdown Kits
Slowdown kits are available for oversize
sectional doors and are highly recommended.
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Slide 58 of 67
• About the Sponsor
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Commercial Upward-Acting Sectional Doors
Sectional Door Safety
Break-Away Bottom Sections
Break-away bottom sections are available for
high traffic areas where equipment (e.g.
forklifts) often passes through the opening
and may strike the door. This section can be
reset in seconds, maintaining the function of
the door and reducing costly service calls.
Sensing Edges
Sensing edges attach to the bottom of the
door and function to prevent the door from
closing on individuals or objects. Sensing
edges can be electric, electric fail safe or
pneumatic, and can be customized to stop
and/or reverse the motion of the door.
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Slide 59 of 67
• About the Sponsor
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Commercial Upward-Acting Sectional Doors
Sectional Door Safety
Wind Resistance
With the damage caused by hurricanes, tropical storms and tornadoes, there is a
growing concern by homeowners, contractors, insurance companies and building
code officials regarding the structural integrity of the building materials used in
commercial applications.
Certain regions of the country, especially coastal areas, have building code
requirements that call for doors that are able to withstand higher wind loads. Wind
load refers to the force transferred to the surface area of the door by wind and is
usually measured in pounds per square foot or PSF.
When selecting a sectional door where high winds are a concern, first determine the
wind speed requirements of the building code in your area and then consult with
your manufacturer to determine the appropriate door for your application.
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Slide 60 of 67
• About the Instructor
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Commercial Upward-Acting Sectional Doors
Upward-Acting
Sectional Door Summary
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Slide 61 of 67
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Summary
Summary
•
Sectional doors represent a versatile, durable, and economical option for
applications where larger than normal door access is required.
•
Sectional doors are available as conventional ribbed-steel doors, insulated
thermally-broken doors and full-view aluminum doors, with a variety of finish
and glazing options.
•
Sectional doors can also be equipped with pass doors, removable mullions and
locking mechanisms, and can be configured with different track, spring,
mounting and operator options to suit the unique requirements of your project.
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Slide 62 of 67
• About the Sponsor
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Summary
Typical Uses & Applications
•
•
•
•
•
•
•
•
•
Commercial Buildings
Industrial Buildings
Institutional Buildings
Government Facilities
Factories/Warehouses
Distribution Facilities
Service Stations
Fire & Municipal Buildings
Any other buildings requiring
access larger than a typical
walk-through door system
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Slide 63 of 67
• About the Instructor
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Summary
Specification Do’s and Don’ts
•
Always Check Headroom & Side Room
–
•
Specify Doors Using Gauge & Decimal Thickness of Metal
–
•
Door travel and installation can be affected by HVAC equipment. For instance, heating
units that are positioned too close to an insulated door can melt the insulation.
Some manufacturers use “nominal” designations for steel gauges. You may not get
the durability that you expect if you do not specify the decimal thickness of the steel.
Be Aware of Local Building Codes
–
Be sure to include the wind load requirements (PSF) of the local building code in the
door specification. Also remember to check the local building code requirements for
full vision doors. Some areas require glass below 4’ to be tempered.
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Slide 64 of 67
• About the Instructor
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Summary
Specification Do’s and Don’ts Cont’d…
•
Specify an Appropriate Operator
–
•
Although gear-driven (oil bath) openers are stronger units, if a sectional door is
balanced properly, the counterbalance should do the work to open the door. Gear
driven openers typically start and stop with a jolt, causing premature wear of the
system. A belt-driven opener is usually a better application with sectional doors.
Don’t Forget the Safety Devices
–
If the door is very large, a solenoid brake is recommended to stop and hold the door
when it is partially open or closed. It is also important to specify a safety sensing edge
when specifying openers. Drop safety devices are also available that will stop the
downward travel of the door if the cables happen to get cut, torn, or wear through.
In most cases, only one cable will be affected, however the possibility does exist that
both cables will fail at the same time.
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Slide 65 of 67
• About the Instructor
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Commercial Upward-Acting Sectional Doors
Upward-Acting Sectional Door Summary
Industry Associations
Many manufacturers of upward-acting sectional doors are members of DASMA
(Door and Access System Manufacturers Association). This group provides standards
for the manufacturing, installation, and operation of these types of products.
Door and Access Systems
Manufacturers Association
www.dasma.com
International Door Association
www.doors.org
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Slide 66 of 67
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Commercial Upward-Acting Sectional Doors
Conclusion of This Program
•
AEC Daily Corporation is a Registered provider with the
AIA Continuing Education Systems. Credit earned upon
completion of this program will be reported to CES
Records for AIA members.
•
If you desire AIA/CES, CSI and/or state licensing continuing
education credits, please click on the button below to
commence your online examination. Upon successful (80%
or better) completion of the exam, please print your
Certificate of Completion.
•
For additional knowledge and post-seminar assistance,
please visit the Seminar Discussion Forum (click on the link
above and bookmark it in your browser).
•
If you have colleagues that might benefit from this
seminar, please let them know. Feel free to revisit the AEC
Daily web site to download additional programs from the
Online Learning Center.
©2004 Clopay Building Products. The
material contained in this course was
researched, assembled, and produced by
Clopay Building Products and remains their
property. Questions or concerns about this
course should be directed to the instructor.
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