Steel—Doing It Right®: Metal Framing Has Many ...

Cold-formed steel (CFS) framing is often used for non-structural applications such as interior partitions. But it can also be used as the main structural framing element of a building, and that may require a whole new set of knowledge for owners, project managers, estimators, foremen, superintendents, code officials, and architects.

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The Association of Walls and Ceilings Industry (AWCI) has developed a program called Steel—Doing It Right® to provide a thorough introduction to the information a contractor needs to effectively estimate, plan, and deliver on a project where CFS is used in structural systems.

Thanks to AWCI, highlights of this course will be included in articles and social posts through BuildSteel.org.

By taking this course, participants can learn about cold-formed steel construction best practices, tap into market opportunities for CFS framing, and increase their potential for business growth.

While the course is not a certification program, each seminar participant receives a certificate of attendance. Attending engineers are eligible for 9 Professional Development hours, and 9 LU hours are available for AIA credit via the AIA “Self-Report” option.

The Steel—Doing It Right course promises a solid return on investment. “This seminar will keep the attorneys away and provide information to increase the contractor’s bottom line,” one attendee says.

In this first Steel—Doing It Right series post, we’ll highlight two main points:

1. The advantages of using CFS framing in buildings
2. The sustainable attributes of building with metal framing

Steel: A Material with Many Advantages

Steel—Doing It Right, Segment 1.1, covers the advantages of using steel framing in buildings and the potential markets developing for steel framing resulting from the adoption of new model building codes.

If someone were to ask you, what are some of the advantages of metal framing, how many could you list?

Cold-Formed Steel Is ...

• Strong
• Light
• Made with consistent quality
• Efficient
• Dimensionally stable
• Isotropic
• Uniform
• Noncombustible
• Resistant to mold and termites

CFS steel framing is strong and light. In fact, it has the highest strength-to-weight ratio of any common structural building material. CFS stud, joist, and track products provide the greatest material efficiency and flexibility in design compared with other framing options, the Steel—Doing It Right online course says.

CFS framing is dimensionally stable, meaning that it will not warp, crack, rot, split, swell, or shrink no matter what the humidity level. The shrinkage of a framing material can cause problems, such as nail pops, squeaks, bowed walls, and sloping floors. This is not an issue with steel.

Steel Advantage: Dimensional Stability

AWCI’s Steel—Doing It Right® course notes that some builders prefer cold-formed steel (CFS) framed buildings because steel often results in lower construction defects.

When wood frame construction is used in high seismic zones, for example, shrinkage control is required. That’s because wood gets shorter when it shrinks. Shrinkage take-up devices must be added to maintain the stability of the structure. Steel framing does not face the same problem.

Being isotropic, steel is uniform in all directions. You don’t have a different design value for steel as you do with wood, where the installer was to frame either parallel or perpendicular to the wood grain, depending on the application. Instead, CFS studs, joists, and track have uniform flat surfaces, which makes it easy for contractors to install attachments to the framing system.

More and more building construction is concerned with safety issues and is opting for non-combustible products. Millions of dollars in claims and hundreds of lives are lost every year in building fires. Many of these could have been prevented, or losses drastically reduced if steel framing had been used.

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Because cold-formed steel is an inorganic product, it does not support the growth of mold which can be a huge issue with wood structures. Concrete and masonry construction brings thousands of gallons of potable water into structures which, if not permitted to dry out properly, can support mold growth.

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Finally, steel can be engineered to meet the most stringent code requirements in the highest wind and seismic loads. All these advantages can lead to reduced insurance costs.

Cold-Formed Steel is Green

Steel—Doing It Right, Segment 1.3, provides background on the sustainable attributes of building with cold-formed steel framing.

Cold-formed steel is environmentally responsible. Steel is 100% recyclable.

Unlike fiber-based products like paper and wood or petroleum-based products like vinyl and plastic, the Steel—Doing It Right course teaches steel is infinitely recyclable, meaning that when steel scrap is recycled into new steel, the new steel can be as strong as or stronger than the original steel in the scrap. This is because the recycling process breaks the steel down to the molecular level, which does not depend upon the length of fibers for its strength and durability.

All steel products including steel framing and steel roofing contain recycled steel. Steel framing contains a minimum of 25% steel scrap, and using recycled steel takes the pressure off renewable resources.

• A 2,000 square foot home constructed with steel framing would use the scrap metal from six old cars
• That same home built with wood would require 40 to 50 trees

Because steel scrap is needed for its manufacture, steel is the most recycled product on the planet. More steel is recycled than paper, plastic, and aluminum combined.

The U.S. Green Building Council, which evaluates buildings and accredits professionals, established Leadership and Energy and Environmental Design or LEED requirements. And cold-formed steel is a perfect fit with LEED. It is also a perfect fit with the green building guidelines established by the National Association of Homebuilders.

Building Code Height and Area Limitations

AWCI’s Steel—Doing It Right® course notes that potential markets for cold-formed steel (CFS) framed buildings are everywhere as owners, architects, and general contractors seek cost-efficient, high-quality construction.

One market sector seeing a resurgence is central city districts. Mid-rise structures located here — hotels, condominiums, and apartments — benefit from CFS-framed construction because steel is lightweight, resistant to mold, fire, and termites, generally involves a reduced installed labor cost, and can help builders meet local height and area limitations.

The height and area limitations in building codes typically include requirements for offsets from the street, offsets from adjacent buildings, and how tall a building can be. In turn, the materials used have a bearing.

Using a non-combustible system like steel framing allows designers and builders to add more space and more units compared with concrete masonry. For an example of this, see the article, Urban Infill Project Saves $1.7 Million with Steel Framing.

CFS: A Key Load-Bearing Element

The AWCI Steel—Doing It Right course, Module 1, says that CFS framing is gaining ground as a load-bearing element.

Cold-formed steel is the material of choice for mid-rise load-bearing construction because it’s lightweight, non-combustible, strong, and straight. It can easily and economically be used for structures from three stories to 13 stories, the Steel—Doing It Right course says.

Really, metal framing can be used in virtually every application within a structure. That includes floors, exterior walls, interior walls, roofs, and single-family residential construction, “wherever the owner values the high-quality, high-performance attributes of cold-formed steel framing,” the Steel—Doing It Right course says.

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Eco-friendliness

Light gauge steel frame buildings are an eco-friendly option too. Steel is the world's most recycled product, and both energy use and CO2 emissions have been reduced in the steel industry over the last few decades. Steel buildings can provide excellent energy efficiency too, especially when combined with other solutions. Airtight connections between steel parts create a completely sealed envelope for the building.

The benefits of light steel framing in construction make steel the ideal choice for construction companies and developers that want to save time and money and build durable buildings.

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