Material Specifications
While Steel
is the most common material, Wonder Buildings are also available
in stainless steel and aluminum for special jobs. Steel buildings
are available in the following commercial coatings: galvanized,
galvalume, galvaneal, or pre-painted material. Arches and accessories
are also available in uncoated or copper-bearing G-210 galvanized
steel for specialized jobs. This page discusses steel specifications
and use considerations, and includes information on galvalume
and galvanized coated steel.
American Shelter buys certified, structural quality steel and
retains all steel certificates on file. All steel is bought
by purchase order to minimum specifications as dictated by
the engineering.
All material produced by American Shelter maintains
a one year manufacturer's limited warranty. Copies of this
warranty are available from American Shelter, free of charge.
Galvalume™ is a registered trademark of BIEC International
and carries a 20-year mill warranty against perforation and
failure caused by corrosion.
Standard Purchasing Specifications
Commercially Coated Steel
The following
are the standard specifications on commercially coated steel.
Steel purchased by American Shelter must be certified to meet
these minimum standards. All steel certificates are kept on
file.
Galvanized Coated Steel:
ASTM A653,
G-90 coated Galvanized Steel, Grade 40, Structural Quality.
Galvanealed Coated Steel:
ASTM A653,
G-90 coated Galvanealed Steel, Grade 40, Structural Quality.
Galvalume™ Coated Steel:
ASTM A792,
AZ 55 (metric=AZ 180) coated Galvalume Steel, Grade 40, Structural
Quality. Galvalume is a registered trademark of BIEC International.
All steel is quoted and purchased to a minimum decimal thickness.
What Type of Coating is Appropriate for My
Building or Project?
Galvalume vs. Galvanized
Since the 1950s,
steel coating technology has brought many improvements to the
building market. If properly designed, installed, and maintained,
your Wonder Building can bring you a long service life. Part
of proper design is choosing the right material and coating
for your building.
Choice of coating should include factors such as compatibility
of other building materials, end use of building, and foundation
type among other factors. Your Wonder Building representative
can discuss the options further with you. The following information
is intended to clarify information about the types of steel
coatings and provide you with general coating information.
Galvalume™ Coated Steel
American Shelter
would like to acknowledge the technical assistance
given by Bethlehem Steel in the process of developing the Galvalume
coated arch building products and standards. Galvalume coated
steel was developed by Bethlehem Steel to combine the corrosion
resistance of aluminum and the sacrificial edge superiority
of zinc coated (galvanized steel). Galvalume coating consists
of an aluminum-zinc alloy (aluminum, zinc and silicon) applied
by a continuous hot dip process. Galvalume coated steel can
provide a superior corrosion resistance under many building
situations. If properly designed, erected, and maintained, your
Galvalume Wonder Arch Building can provide superior building
performance.
Advantages of Galvalume
-20-Year Mill
Warranty
-Superior Corrosion Resistance to Galvanized Coating Under Normal
Atmospheric Exposure.
-Cost is comparable to bare Galvanized Sheet.
-Available for Arch Buildings in thicknesses from .026 (24 gauge.)
to .074 (light 14 gauge).
-Better corrosion resistance at sheared edges than aluminum-coated
sheet steel.
Galvanized Coated Steel
Galvanized
Steel has provided Wonder Building customers with quality buildings
since the early 1950s. While Galvalume has superior corrosion
resistance under normal atmospheric conditions, galvanized is
often the preferable choice for certain building applications
or when galvalume is not compatible with other building materials.
Advantages
of Galvanized Steel
-For
livestock applications such as cattle or pig confinement buildings,
galvanized is recommended over galvalume.
-When the arch building is to be grouted into a keyway or otherwise
in contact with wet concrete.
-When the building is in contact with copper or lead.
-When steel thickness greater than .074 (light 14 gauge) is
required.
-When field painting of the building.
Pre-painted
Galvalume vs. Pre-painted Galvanized
The
corrosion resistance of pre-painted galvalume and pre-painted
galvanized is equivalent.
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