cfs + composite slab

1. Construction Technology III
Steel Framing System
[ Cold-Form Structures + Composite Floor Slab ]
Tan Shen Sin ( 0324602 )
Thasia (0329051 )
Wong Sher Sheng ( 0329950 )

2. Cold-formed Structure

3. ● "Skeleton Frame" of
vertical steel columns and
horizontal I-beams
● Provides excellent design
flexibility due to the high
strength to weight ratio of
steel

4. ● Used in high rise building,
industrial building, residential
building and temporary structures.
● Components include steel beams
and columns, portal frames and
roof trusses

5. How cold-form steel is manufactured ?

6. 1. Cold-formed steel starts with the production
of raw steel, which is made by combining iron
ore or steel scrap with small amounts of
carbon in a Basic Oxygen Furnace (BOF) or
Electric Arc Furnace (EAF)
1. Molten steel is poured into slabs that are
reduced into thinner strips of steel, called “hot
band.”

7. 3. In the steel finishing process, the hot band is
reduced once again into “cold rolled steel.” A
protective coating of zinc is then added through
the galvanization process. The final product is
called a “coil.”
4. To convert coils into cold-formed steel framing
members, they are first slit into widths that match
the intended dimensions of the final product.

8. 5. The slit coils of cold-formed steel are formed
into C-sections and other shapes usually by roll
forming the steel through a series of dies. No heat
is required to form the shape. A variety of steel
thickness is available to meet a wide range of
structural and non-structural applications.
6. The cold-formed steel framing materials are
then either used to build wall and floor panels,
and roof trusses, or delivered to the job site in
bundles.

9. Advantages of cold form structures
High Strength Durable Non-combustible
Sustainable Cost-effective Light Weight
- Provides greater
flexibility, allowing
difficult design.
- Protective layer of zinc
provide hundred years of
durability
- Can be easily design to
meet code fire rating
requirements
- The only material that is
infinitely recyclable.
- Lower insurance cost for
builders and owners
- Easy to transport and erect

10. Disadvantages of cold form structure
Low fire resistance
Careful requirements
when assembling
Difficult connecting
Require thermal &
sound insulation

11. Composite Floor Slab

14. Advantages of composite slab
Versatility
Resistance/weight ratio
Quick Installation
Cost reduction
Safe
Strength
Easy on site handling
Can be adapted to many practical cases and a multitude
solutions
Greater resistance with less weight
Concreting can be done in more than one floor
Less concrete is used
Easy cleaning and stock-piling
Lighter and stronger than most conventional slab.
Transported to site in pre cut lengths, and in pre-packaged
bundle.

15. Disadvantages of composite floor slab
1. Composite are more brittle than metal
2. Most of the slab will crack
3. Temperature sensitive
4. Might cause overloading
5. Damaged or faded material must be replaced

16. Case Study

17. ● A seven story hotel built by Brackett Builders of Troy, Ohio.
● Project Completed in 2009.
● General contractor has estimated cost savings of $10/square feet.
Embassy Suites ,Columbus, OH
Project Owner : Airport Core Hotel, David Patel
Project Architect : Bird Houk Collaboration
Project Engineer : Jezerinac Geers
General Contractor : Brackett Builders
Steel Framing Manufacturer : Worthington Mid-Rise
Construction

18. ● CFS framing was used for interior and
exterior load-bearing and non load-bearing
walls, and floor and roof joists.

19. ● Largest cold-formed steel (CFS) load-bearing framing project in California
● Project completed 6 months sooner than original schedule.
● a LEED ( Leadership in Energy & Environment Design) Gold project
Poly Canyon Village Student Housing
Project Owner : California Polytechnic State University
Project Architect : Ed Palmer, Niles Bolton Architects
Steel Framing Installer : KHS&S

20. ● Comprised of nine buildings, each with a 4 or 5 story CFS structure on a
slab foundation.
● Floor framing was accomplished with CFS floor joists with 9/16 inch of
shallow metal decking
● Roof framing consisted of steel trusses

21. Thank You