American Duro Span FAQ's Section
What are American Duro Span
buildings made of?
Our Arch style buildings are made of all AZ60 SUPER GALVALUME PLUS
coated steel. A special alloy containing Zinc, Aluminum and
How long does it
take to get my building after I've ordered?
Duro Span buildings deliver in about 3 weeks. Prior to receiving
your building we will provide you with an easy to read erection
and foundation manual. With a little planning ahead on your part,
you can set concrete footing and site location.
Can I get any size
building I want?
Yes. American Duro Span buildings are available in widths from 10 feet to
100 feet and any length you require. Duro Span can deliver
whatever size building you need. However we recommend you keep
your building width in 10 ft increments and your length in 20-25
ft increments, you'll save a lot more money.
How do I know my
Duro Span building will meet my local building codes?
Every American Duro Span building is designed to local building codes and
in fact, we can provide you with stamped engineered drawings from
a registered engineer who is licensed in your state.
Why should I buy
from American Duro Span
With over 20 years of experience in the metal buildings
industry, Duro Span has the experience, quality and reputation you
need when making a major, long-term capital expenditure.
What type of foundation is
A simple, easy to lay, pre-drilled foundation connector makes
building withus easy. Our unique nut-and-bolt assembly
provides strong, accurate, long lasting construction. For more
information on the various types of foundations available, see the
section of our site on construction.
Can I insulate a Duro Steel
Duro’s clear span, trussless design ensures that your building
will easily accept any form of conventional insulation methods:
spray on, fiberglass rolls or rigid foam. Installing ducting for
heating and air conditioning is also very easy.
What about heat and noise factors?
The high aluminum content in our Galvalume actually helps keep the
building cooler inside. The deep corrugation of the panel (which
makes it uniquely 3-sided) leaves less exposed surface area which,
along with our thick gauge steel, dramatically reduces noise.
What type of ventilation system is
Duro understands the importance of ventilation to our customer.
Our clear span buildings offer unobstructed airflow and superior
temperature consistency. We offer two types of ventilation systems
for our buildings—gravity and turbine—or you can install a custom
But isn’t a steel building an
That’s a common misconception. To start with, Duro buildings are
easy to install. That results in lower assembly and building
costs. Our buildings are virtually indestructible and maintenance
free. Look at lower insurance costs and less overall maintenance
over the years and you’ve got a winner.
How long till I receive my Duro
We can ship most buildings within 2-3 weeks from when you place
your order with us.
Can I add on to the length of my
building in the future?
Duro buildings use 2’ x 10’ panels fastened together with a single
sized nut and bolt system. Since this construction method is
uniform throughout the building process, adding more arches to
your building for additional length is no problem at all.
Can I raise up the sides?
Raising the sides of your Duro building can be done by
constructing your foundation to include concrete sidewalls.
Customers usually use this method to increase the sidewall height
by 2' to 4'. Also, depending on the building model, higher
sidewalls may be available as a customized option.
Can I put the building on a
concrete or wood wall?
Need to get more side wall height? Duro buildings can be
constructed on a wide range of foundations, including one with
high walls. Whether you build the side walls of concrete or of
wood, the Duro foundation base plate allows you to construct your
building the exact same way.
Can I run electrical wiring through
Running electrical wiring is no problem at all with a Duro
building. If you don’t know how yourself, you’ll likely want to
get an electrician to do the work, but many of our customers have
installed lights and power outlets, not to mention machinery
Can I put in a partition?
Once your building is up, customizing the inside is no problem. A
partition is only one of thousands of ideas to best use the space
available in our trussless, clear span designs. Be it partitions,
walls or even cubicles for office space, you’ll find you have
plenty of room for all your needs.
Can I add a mezzanine in my
Several of our customers have added mezzanines to their buildings
to provide themselves with even more storage space. Garages are an
excellent example: put in a mezzanine over the large front door to
give yourself some storage space for Christmas ornaments,
gardening supplies, car maintenance materials, or anything you
Can I put in stalls for my horses?
Horses, cows, pigs—whatever animals you care for, adding stalls
and pens in your Duro building is easy. Without support posts to
build around, you can add as many stalls as you need and make them
as large as you want.
Can I install heating and air
Builders constantly praise the easy access provided by our clear
span, trussless designs for installation not only of heating and
air conditioning systems, but other systems as well including
electrical wiring, plumbing, drywall, false ceilings and
Can I use my building for bulk
Bulk storage is one of thousands of possible applications for your
Duro building. Whether you’re storing grain, machinery, widgets or
anything else, you’ll find that a Duro building provides you the
space, protection and expandability you need.
Where should skylights be placed?
Skylights should be staggered from side to side to maintain
maximum building strength. Skylights are easy to install since our
skylight panels use the same single nut-and-bolt fastening system
as our steel panels. And, with a number of color options, you even
have control over the natural light coming into your building.
Can I put my own ends and doors in?
When you need to match or complement existing structures or extend
and customize your building, a wide range of endwall options—and
our user-friendly endwall adapters—make it convenient to complete
your project consistently and economically. Similarly, you can
install a frame to accept any custom door.
Can I bury my building underground?
No. Burying the building underground means that it is under
constant weight, pressure and stress from the earth in which it is
buried. Duro buildings are not engineered for this kind of use.
Can I add any weight to the roof of
Adding weight to the roof of a Duro building should be done with
care. Duro buildings, once constructed can take a great deal of
weight and stress. However, adding weight directly to the roof (a
catwalk, for example) should be done only after consulting your
dealer or an engineer.
Are side entrances available?
Side entrances can be built into any of the Duro Steel models.
Your side entrance can feature a service door, sliding door or
overhead door. As with end doors, you can use Duro doors or
install a frame for any custom door.
What if pieces of my building are
missing or damaged?
Duro Steel buildings are inspected on three separate occasions
prior to shipment to ensure complete satisfaction. In the unlikely
event that something is missing or damaged, simply call your
dealer to report the problem. Replacement pieces will be shipped
to you as soon as possible.
How long has Duro manufactured steel
Since 1998, the Duro Steel name has been synonymous with clear
span, trussless, self-supporting arch style steel buildings. Duro
Steel is a leading edge manufacturer and worldwide exporter of
dependable, steel building solutions. Specialized in-house
engineering facilities and our years of experience and expertise
enable us to successfully design and create steel buildings for
virtually any application.
Are there installation crews
available if needed?
Yes, we are able to offer installation services on all our
building virtually anywhere!
Do I need a building permit?
Every city, town, region and county has its own by-laws regarding
building and the kinds of permits and documentation required. Ask
your dealer about by-laws in your area or where to find out about
them. Should you need a permit, we can supply engineer’s
blueprints or anything else you may need to secure one.
What will prevent condensation in
Condensation is not unique to steel buildings. All types of
buildings create condensation if proper ventilation is not
installed. If condensation is a problem, you may need to add more
ventilators to your building.
Who do I contact for assistance, if
Chances are you’ll have questions about your steel building at
some point. While we’ve tried to answer as many as possible here,
you may have additional questions. Contact
Us with any additional questions. We are here to help!
How do I get the building off the
You have a few options: if you have access to a forklift or
front-end loader, either make it very easy to unload your
building. If neither is available to you, round up some friends to
help unload. The driver will give you a hand, but the more people
there to help, the faster the unloading will go.
Can I paint my steel building?
You can paint your steel building as you would any other type of
building. For more information on how and what types of paint you
can use, visit our pages on painting your Duro Steel building.
What types of warranties do you
offer on Duro buildings?
There are two warranties on your building. There is a 30-year
warranty on the Galvalume steel panels against corrosion as well
as a 12-month warranty against any manufacturing defects.
What prevents my building from
collapsing under snow or due to high winds?
Different gauges of steel provide varying degrees of protection
from such forces as snow and wind. In an area of heavy snowfall or
high winds, a thicker gauge steel will provide the strength and
stability required to withstand these stresses. You dealer will
recommend a metal thickness suitable for your region.
What prevents my building from
Duro buildings are engineered to prevent leaking. Once
constructed, each panel overlaps the next one down by 9”.
Furthermore, each arch overlaps the next by 3”. Just follow the
instructions in your construction manual and your building should
be virtually free of any leaks.
Will my building rust?
We know that a rusted steel building is an eyesore, which is why
we manufacture all of our buildings from AZ180 Galvalume Plus ™
steel, which carries a 30-year warranty against corrosion. Your
building should remain eye-pleasing for years and years.
How many people will I need to help
put up my building?
More than 75% of Duro customers erect their buildings themselves.
Construction of a Duro building requires only four (4) people.
Construction can be done with fewer or more people, but four
people can get the job done, depending on the size of the
building, in a matter of days.
How thick is the steel?
Steel thickness is measured in ‘gauge’. The lower the gauge number
the greater the thickness. Duro uses 14 to 22-gauge Galvalume Plus
™ steel. We’ll recommend a lower gauge steel to someone
constructing their building in an area of heavy snowfall or high
winds. The thicker steel provides additional protection from such
How long can the building be
outside before construction begins?
If it is necessary to store your Duro building outside for a
significant length of time, precautions must be taken. It is
insufficient to simply cover the shipment with tarps; in fact,
this is probably the worst thing to do.
Cut the strapping and separate all
arch panels with small pieces of dry wood to allow air circulation
between all sheets.
The endwall bundles must be
totally separated so that no two sheets are in contact with each
All parts should be separated and
stored on dry wood blocking up off the ground.
If Galvalume steel, stored outside for
a significant amount of time, is allowed to become damp while in
contact with other pieces, it may develop a white or dark grey
deposit known as ‘wet storage stain’. If you follow the
recommendations listed above, this staining will not occur.
Can I recess the endwall and have
Whether you use our endwall or your own custom option, it is
possible to recess the wall to have an overhang above.