Freestanding Partial Canopy Mobile

Freestanding - Partial
Canopy

Flexibility:
Our freestanding partial canopy hangar
door systems are available in many
configurations to meet your specific
requirements. Freestanding partial
canopy door systems can be placed
nearly anywhere in relation to your door
opening. The only requirement is for
roughly two feet of additional headroom
above the opening height behind the door
support framing. Having built partial
canopy door systems over 35' tall and
over 120 feet in width, with wind loads
(while closed) up to 200mph, we are
confident that we can build a system that
will meet your requirements and your
imagination.

Design:
Doors are designed using CAD and
structural engineering software. Door
frame structure and connection designs
are certified by an independent engineer.
Door frames are engineered using
structural steel and cold formed members
per AISC and AISI codes. Wind loads are
calculated using your location and
building size for the most accurate
structural loading possible. We don't
make an assumption on the wind load by
using an arbitrary standard, we verify
every time.

Construction:
Door components are manufactured to
the highest standards and designed to be
completely bolt together, avoiding costly
delays due to welding inspections and the
availability of certified welders in the field.
Door components are also designed to
have as few connections as possible,
simplifying and increasing assembly
speed on the job. This lowers the total
installed cost for your door system.

Lift System:
There are three systems available for
lifting. The premiere design we use for
lifting doors is the hydraulic lifting unit. By
utilizing a hydraulic cylinder to control door
movement a large safety factor is gained.
Hydraulic fail safe valves are used to lock
the cylinder in place if a control valve
should fail or a hydraulic line is ruptured or
damaged. (We became real believers in
this system and the components we use
after another company's careless
employee ran a piece of equipment into
the hydraulic lines of a large canopy door
while the door was open and construction
personnel were working directly
underneath it. Other than some hydraulic
oil that spilled out of the broken pipe there
was no further damage to the door system
and more imporantly the door didn't fall.
So no one got hurt, or worse. This
particular door weighs over 14,000 lbs.
After settling about 1", which is the fluid
volume necessary to activate the fail safe
valve, the door maintained it's position for
over a week before we were contacted
and repairs could be made). The closing
speed can be easily tuned by adjusting
the factory installed speed control valve.
The lifting winch system offers simplicity in
design and installation. The lifting winches
are directly mounted to the door frame, so
no lift unit is necessary. No pulleys need
to be added to the building and no
compressive force is exterted on the
header. All this adds up to very few
moving parts, which equates to lower
maintenance costs over the life of the
door. The third lift system available is the
tried and true counterweight system. The
counterweight system has been used on
countless doors for as long as doors have
been built. The main drawback with this
system is the space required for the
counterweight tower and the cost of the
counterweight material.

Supporting Cables:
Partial Canopy doors are supported by
galvanized cables using a safety factor of
at least 5-1, stainless steel cables
available upon request.

Door Supporting System:
The cables are supported by solid steel
pulleys that are machined in house and
installed with roller bearings for a long
service life. Pulley axles are drilled and
tapped for grease fittings for ease of
maintenance.

Weatherstrip:
Weatherstrip is 1/8" cloth inserted epdm.
Weatherstrip meets military specifications
for durometer, UV resistance and
incidental exposure to paint thinners.
Retainer bar is fastened by zinc coated
self drilling screws every 8" for a secure
seal without oil canning of retainer bar.
Retainer bar is easily removed for
replacement of weatherstripping if it
becomes necessary. Leading edge
bubble seals alow for 4" of compression.

Electrical Controls:
Door control panels are manufactured in
house using only the highest quality UL
listed components. Door control systems
utilize electromechanical relays that are
highly resistant to electrical interference
and have no programming that can
become corrupted requiring service. Door
control systems also utilize solid state
proximity sensors for limiting door travel.
These sensors are water proof and have
no moving parts to wear out. Door control
systems can be supplied ranging from
12VDC to 600VAC. Variable frequency
drives are available for custom tuning or
varying of door operating speed. Variable
frequency drives come with variable
speed buttons with 3 adjustable speed
settings standard, 5 speeds as an option.

Standard options:
Timer delay with safety noisemaker
and/or strobe light, safety edge with delay
and/or auto reverse, personnel door
frames and safety interlock sensors,
explosion proof drive system, air drive
operating system, hydraulic drive
operating system, 12VDC backup
hydraulic pump system, engine driven
backup hydraulic pump system. Door
drive motors and control panels are fully
assembled, wired and tested at our
facility prior to shipping.

Please call with your custom option
requirements, we are here to create the
system that meets your needs and your
imagination.