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Elements
of Green Building
Elements of Green
Building : Structural
Elements : Steel Framing
Steel Framing
What is
it? –
Imagine the wood framing of a traditionally
built home, but where there are 2x4s, 2x6s, etc., there are steel studs. The studs themselves start out as large steel
sheets. These sheets are passed through
a series or rollers, none of which use heat, to bend the steel to make more
useful shapes for buildings, like the flanges, web, and lips of a stud or
C-shape. Steel studs come in various
shapes and sizes, much like those that builders are accustomed to seeing in
dimensional lumber, including 2x4, 2x6, 2x8, 2x10, etc. The lengths are custom cut in the steel
plant. And, since there is no heat used
to shape the steel, no integrity or strength is lost. The shape makes the studs stronger than the
original steel sheet. The steel studs
can either be sold as is or placed into configurations to be sold as wall panels.

Applications
–
Since steel is so strong, durable, versatile, and
affordable, it can be used as framing for a great variety of situations, from
superstructures like skyscrapers, bridges, and high-rises to lower-scale
building projects like commercial shopping centers and residential homes. Since steel’s strength-to-weight ratio is so
high, it is ideal for situations that require long spans. For example, steel opens up possibilities for
wide, open living spaces in residences.
Advantages –
Disadvantages
–
“Thermal
bridging” occurs when hot or cold air is drawn to a stud, resulting in heat
loss or gain. In cold climates, thermal
bridging could result in increased heating costs and in hot climates, heat gain
could result in moisture damage. When we
build with steel, we use thermal barrier insulating materials to provide
exceptional heat and cooling loss protection to steel-built homes.
What makes
it “green”?
- Steel
is completely recyclable. In fact, steel
is North America’s most recycled material.
More than 65 million tons of steel scrap is recycled each year. More steel is recycled than paper, aluminum,
glass, and plastic combined. As an end
result, recycling steel scrap also saves landfill space and natural
resources. When the steel framing of a
home has outlived its useful life, it can be recycled into new steel.
- An
average 2,000 square foot steel framed house can generate as little as a cubic
yard of recyclable scrap, diverting material for local landfills. This is partly because steel studs are cut to
exact lengths from steel stud machines so there are no wastes at the
construction site. The wastes in the
steel plant are recycled to make more steel.
- Steel
framing contains at least 28 percent recycled steel and is completely recyclable. Using recycled steel takes the pressure off
renewable resources. For example, a
typical 2,000-square-foot home requires about 40 to 50 trees, about an acre’s
worth. With steel, only the equivalent
of about six scrapped automobiles is needed.
- When
used with thermal barrier materials, there is minimal heating and cooling
loss. Steel framing also results in less
loss around windows and doors as well as foundation and roofing connections
because the steel will not warp and move, ridding concern of gaps and
accompanies energy loss created over the life of the house.
- Steel
framing means less need for lumber.
Today, more than 90 percent of North America’s old-growth forests are
already being harvested. This eases the
strain on these dwindling forests, saving the wildlife that lives in those
forests, as well.
- Steel
is non-toxic and allergy free, which means healthier living for occupants.
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