Intro to Structural Cold Formed Steel (CFS)

Transcription

1 Intro to Structural Cold Formed Steel (CFS) This continuing education program is sponsored and provided to you due to the professional courtesy of: Super Stud Building Products Inc Woodbridge Ave Edison, NJ Phone: (732) Website: AIA-SS0501-W The material contained in this continuing education program belongs to Super Stud Building Products Inc. Questions or concerns about the program content need to be addressed with the program instructor. 1

2 Promotional Statement Slide This course has been design as a structured asynchronous program therefore has been formatted for online use only. Please don t forget to print your AIA/CES Certificate of Completion. Successful completion is scoring 80% or higher on your final exam. If you wish to print later you can access all certificates from you re A-F transcript center. The American Institute of Architects Course No. SS0501-W; LUs This program qualifies for HSW. Architect-Forum is a registered provider with The American Institute Of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates Of Completion for non-aia members available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA.of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. 2

3 Course Description Cold Formed Steel (CFS)is a staple in modern Commercial and Multi-Family building projects. From steel s unbeatable strength and dimensional stability to it s non-combustibility and resistance to mold, rot, or warp, CFS is an ideal building material. In this presentation we will review what CFS is; how to incorporate CFS into your next design project drawings and specifications; and can contribute to and even improve your next building project. 3

4 Learning Objectives At the end of this program, participants will gain a basic understanding of: What is Cold Formed Steel (CFS) Industry Standard Definitions for Structural CFS Framing Building Design with Structural CFS Specification Documents for Structural CFS The Sustainability (Environmental) Benefits of using CFS on your Project The Health Benefits of using CFS on your Project 4

5 Course Outline 1. What is Cold Formed Steel (CFS) A. Basic Attributes of CFS 2. Industry Standards for Structural CFS Framing A. Anatomy of a Stud B. Typical Material Thickness C. CFS Shapes D. Industry Standard Nomenclature E. Labeling and Delivery 3. Building Design with Structural CFS A. Applications for Structural CFS 4. Specification Documents for Structural CFS A. Spec Section B Rust Prevention Coatings C Other Notes 5. The Sustainability Benefits of CFS on your Project A. Be GREEN With CFS 6. The Health and Safety Benefits of CFS on your Project A. Be HEALTHIER With CFS 5

6 What is Cold Formed Steel (CFS)? 1 Section: What is Cold Formed Steel (CFS)?

7 What is Cold Formed Steel (CFS)? Sheet steel comes in huge coils, protected by galvanized coatings and shipped to CFS manufacturers directly form steel mills. The steel is then cold-formed into shapes used to be used in all types of construction applications. Cold-forming is a process where CFS members are manufactured by rolling and shaping the steel coils at ambient temperatures. Hence the product is called Cold Formed Steel, unlike large beams and columns that typically involve a hot process. The cold rolling process makes the steel stronger.

8 Basic Attributes of CFS The steel used to form CFS must comply with ASTM A1003 before it is even rolled into shape. This means that the CFS on your jobsite is guaranteed to be of a certain thickness and strength, and already coated to protect it against rust. 8

9 Basic Attributes of CFS Once the coils are rolled into shape, the finished framing member must comply with ASTM C955. This ASTM testing specification defines minimum standards of acceptable shapes and sizes of framing members. Of course, various shapes and sizes can be independently engineered to perform for your specific project requirements and stress load conditions. 9

10 Section Summary Quiz Q BEFORE steel is rolled into shape, what ASTM must it comply with? View answer A ASTM A 1003 This means that the CFS on your jobsite is guaranteed to be of a certain thickness and strength, and already coated to protect it against rust. 10

11 Section Summary Quiz Q AFTER steel is rolled into shape, what ASTM must it comply with? View answer A ASTM C 955 This ASTM testing specification defines minimum standards of acceptable shapes and sizes of framing members. 11

12 Industry Standards for Structural CFS Framing 2 Section: Basic Product Design and the Different Types of CFS on Jobsites.

13 Anatomy of a Stud Flange Depth Flange Depth (1/1000 in) Return Lip (1/1000 in) Web Depth Web Depth (1/1000 in) 1 3/ / ½ ½ This is the shape and parts of a typical Cee stud. The size of the return lip is always defined by the depth of the flange. 2 ½ / (Non-load bearing or drywall studs use a 1.25 flange.) 13

14 Typical Material Thickness Gauge Reference Mil Thick* Design Thick (in) Min. Thick (in)** Typical FY (KSI) *The safest way to refer to stud thickness is by Mil, or 1/1000 inch. This standard is fairly well recognized as is a quantifiable thickness as opposed to gauge. ** AISI S200-7 allows a delivered material thickness to be a minimum of 95% of Design Thickness 14

15 CFS Shapes CFS can be cold-formed or rolled into a variety of shapes. Remember the acronym STUF. These letters represent the most common shapes in CFS framing. S = Stud T = Track U = U-channel F = Furring 15

16 Industry Standard Nomenclature 600 S Member Depth in 1/100 inches Stud or Joist 1-5/8 Flange in 1/100 inches Min. base metal thickness (.054 = 54 mils) Different manufacturers may use a different nomenclature to define the shape or flange size of their studs. Using this INDUSTRY STANDARD NOMENCLATURE accounts for and eliminates concerns regarding what materials are required by the Specifier and are shipped to the job site.

17 Labeling and Delivery Additionally, every framing member (stud) should be labeled, either with a sticker or an inkjet marking on the inside web of the framing member. This ensures that every framing member is identifiable, even after it is installed. (Pic of Skid) Inside web of ink-jetted stud (partial ID) Studs on skids and ready for shipping 17

18 Labeling and Delivery Steel Studs are typically delivered on pallets or skids. Full skids must be labeled with what material is packaged on the skid. Certain common stud sizes are typically readily available in stock lengths. Example: 600S (6 Stud with 1 5/8 flange in 54 mil) in 12 lengths For other shapes or sizes, you may need to order your items custom, such as studs with a 1 3/8 flange. Even though they are available and considered part of the standard sizing, they are not frequently used. These items may take a few days to deliver. 18

19 Studs and Joists What is the difference between studs and joists? NOTHING. These are the same items; the only difference is in the application. Studs installed vertically and are used for all kinds of walls. Joists lay horizontally and are used for flooring or roofing. 19

20 Section Summary Quiz Q What are the THREE parts of a stud? View answer A Web, Flange, and Return Lip 20

21 Section Summary Quiz Q What is the best way to describe metal thickness (to avoid confusion)? View answer A Mills, or 1000ths of an inch This standard is fairly well recognized as is a quantifiable thickness as opposed to gauge. 21

22 Section Summary Quiz Q Once material is delivered and unpackaged, how can you tell what size stud you re looking at? View answer A Ink-jetting on inside web of the stud will tell you it s size, material thickness and coating. This ensures that every framing member is identifiable, even after it is installed. 22

23 Building Design with Structural CFS 3 Section: Where and How to Use CFS on Your Project

24 Applications for Structural CFS Load Bearing Framing- This is a generic term which typically refers to any application of CFS that bears a gravity or axial load. Always 33+ mil

25 Curtain Wall Curtain Wall Framing- CFS framing used to support exterior cladding such as brick, EIFS, siding, or panels. Typically does not carry gravity loads. Always 33+ mil 25

26 Roofs and Roof Trusses Roofs and Roof Trusses- CFS is easy to cut to size and dimensionally stable, making it an ideal material for roof trusses. 26

27 Floor Systems Floor Systems (Joists)- CFS dimensional stability and consistent load capacities, and noncombustible quality make CFS products ideal structural materials for floor joists in fire-rated assemblies. 27

28 Interior Load Bearing Interior Load Bearing- When building interior load bearing walls, be sure to line up the studs. Notice here the Load-Bearing walls stack up to support the building frame. 28

29 Exterior Load Bearing Exterior Load Bearing- CFS is often used in bypass or balloon framing assemblies. Notice the studs run continuously past the floor deck 29

30 Applications for Structural CFS To determine the correct size and thickness of your framing member, be sure to reference your manufacturer s load tables. These tables cover: Joist loading Curtain wall load and deflection Capacities for load bearing studs 30

31 Section Summary Quiz Q Load Bearing CFS is always what minimum thickness or greater? View answer A 33 mil Load Bearing Framing- This is a generic term which typically refers to any application of CFS that bears a gravity or axial load. Always 33+ mil 31

32 Section Summary Quiz Q What framing limitations are there when using Interior Load Bearing CFS studs? View answer A Load Bearing CFS studs must always stack up, or be installed one directly on top of another. 32

33 05400 Specification Documents for Structural CFS 4 Section: How to Ensure the Steel You Want Is the Steel You Get

34 Spec Section CFS is covered under spec heading Every project should come with a spec book to tell the contractor specifically what kind of steel you want on the job. Specifications are often reused from one project to the next. HOWEVER, spec sections should be reviewed often to ensure up-to-date information and project specific requirements. (Sample spec book cover page)

35 Spec Section All CFS Specifications should include the following information: Building Code and Year Gravity Loads Wind Loads Deflection Criteria (Sample spec page) 35

36 Spec Section You also need to note if your project requires any required inclusions or exclusions, such as: Minimum Thickness Minimum Galvanization Finally, make sure your spec book coordinates with your drawings. This will help your contractors bid the project more competitively, and more accurately. 36

37 Rust Prevention Coatings Galvanization comes in either G60 or G90 weights. G60 is standard for all load-bearing items (33 mil or thicker). G90 provides more protections against rust, but is more expensive. Galvanization is measured by the WEIGHT of the coating over a given SURFACE AREA G60 coatings =.60 OZ Galvanized coating over One Sq. Ft. G90 coatings =.90 OZ Galvanized coating over One Sq. Ft. Rust protection from Galvanized coatings is equal to the amount of coating THEREFORE G90 coatings provides approx. 50% more protection than G60 37

38 Other notes Steel yield strength should be listed as either 33 or 50 KSI gauge will typically be 33 KSI minimum gauge will typically be 50 KSI minimum Minimum delivered thicknesses, according to AISI are 95% of the design thickness. If you must list a minimum thickness for materials in your spec, note the Minimum Delivered thicknesses in 1/1000 s of an inch or Mils. EX- Note either.0538 or 54 Mils instead of 16 gauge. 38

39 Section Summary Quiz Q What are typical galvanization coatings for CFS? View answer A G60 standard, G90 on request G60 coatings =.60 OZ Galvanized coating over One Sq. Ft. G90 coatings =.90 OZ Galvanized coating over One Sq. Ft. Rust protection from Galvanized coatings is equal to the amount of coating 39

40 Section Summary Quiz Q What does AISI S tell us about material thickness? View answer A AISI allows a delivered material thickness to be a minimum of 95% of Design Thickness If you must list a minimum thickness for materials in your spec, note the Minimum Delivered thicknesses in 1/1000 s of an inch or Mils. EX- Note either.0538 or 54 Mils instead of 16 gauge. 40

41 Section Summary Quiz Q What minimum information does your spec book AND drawings need for CFS? View answer A Building Code and Year, Gravity Load, Wind Loads, and Deflection Criteria 41

42 Sustainability Benefits of CFS on Your Project 5 Section: Benefits of Using CFS on Your Project

43 Be GREEN with CFS STEEL is the world s most recycled product; 100% of any recovered material can be totally recycled into new products. Because steel does not loose it s structural characteristics when it is re-milled, steel s lifecycle is remarkably long. CFS contains, on average, a minimum of 25% recycled content Steel produced in Basic Oxygen Furnaces (BOF) contained an average of 36.9% recycled content by weight in 2012 Steel produced in Electric Arc Furnaces (EAF) contained an average of 89.89% recycled content by weight in 2012 (Numbers taken from Steel Takes LEED with Recycled Content published by the Steel Recycling Institute, October 2012) CFS is a LEED recognized product the only product to receive a default 2 POINTS in the program specifications 43

44 Be GREEN with CFS CFS Products can be made to custom lengths, so there is less scrap and waste on the jobsite. Because steel is dimensionally stable, your building envelope remains tight (windows, doors, and other envelope openings), improving the efficacy of insulation and HVAC systems. Steel has a low weight-to-strength ratio, allowing your building to be lighter. 44

45 Section Summary Quiz Q What percentage of steel scrap is recyclable? View answer A 100% STEEL is the world s most recycled product; 100% of any recovered material can be totally recycled into new products. 45

46 Section Summary Quiz Q How many LEED points can CFS on your job help your project earn? View answer A 2 Points CFS is a LEED recognized product the only product to receive a default 2 POINTS in the program specifications. 46

47 Health and Safety Benefits of CFS on Your Project 5 Section: Benefits of Using CFS on Your Project

48 Be HEALTHIER With CFS Steel is an in-organic material, and as such does not support: Rot Mold Pests Insects Fungus Steel does not contain any Volatile Organic Compounds (VOCs) 48

49 Be SAFER With CFS CFS is a non-combustible building material Steel does not burn or contribute fuel to a fire. Steel is often and easily used in UL fire-rated assemblies. 49

50 Section Summary Quiz Q Steel can help make your completed project healthier by NOT containing any: View answer A. Volatile Organic Compounds (VOC s) 50

51 Section Summary Quiz Q Steel is easily used in what type of firerated assemblies? View answer A. UL Rated Assemblies 51

52 Course Summary By now the participants should have gained a basic understanding of: What Cold Formed Steel (CFS) is Industry Standard Definitions for Structural CFS Framing Building Design with Structural CFS Specification Documents for Structural CFS The Sustainability Benefits of using CFS on your Project The Health Benefits of using CFS on your Project 52

53 Questions For The Next Ten Minutes This concludes the course material. The following ten minutes will be for taking a short exam. You must complete the exam with an 80% or higher in order to receive credit. Please make sure and print your certificates of completion either for AIA/CES or for state MCE credit. Remember if you are an AIA member Architect- Forum will report credits to the AIA CES on your behalf. 53

54 INTRO TO STRUCTURAL COLD FORMED STEEL (CFS) This concludes the continuing education program. This continuing education program is sponsored and provided to you due to the professional courtesy of: Super Stud Building Products Inc Woodbridge Ave Edison, NJ Phone: (732) Website: AIA-SS0501-W The material contained in this continuing education program belongs to Super Stud Building Products Inc. Questions or concerns about the program content need to be addressed with the program instructor. 54

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56 Quiz Instructions In order for you to get credit for this program you must successfully complete the following short exam. Pass for this exam is 80% or higher. Please make sure and print your certificates of completion either for AIA/CES or for state MCE credit. Please print your Certificate of Completion upon successful completion. You can print the certificate from your A-F transcript any time after completion. If your colleagues can benefit from this course, please let them know. Feel free to revisit the Architect-Forum LMS elearning System to take additional courses.

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