Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

162 Chapter Five
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Accessory
Safety
Factor Type of Construction
Form tie 2.0 All applications
Form anchor 2.0
3.0
Formwork supporting form weight
and concrete pressures only
Formwork supporting weight of
forms, concrete, construction live
loads, and impact
Form hangers 2.0 All applications
Anchoring inserts
used as form ties
2.0 Precast concrete panels when used
as formwork
Notes:
1. Reprinted from ACI Committee 347, Guide to Formwork for Concrete, American
Concrete Institute.
2. Safety factors are based on ultimate strength of accessory.
TABLE 5-10
Minimum Safety Factors for Formwork Accessories
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References
1. “National Design Specification for Wood Construction,” ANSI/AF&PA NDS-
2005, American Forest & Paper Association, Washington, DC, 2005.
2. “Design Values for Wood Construction,” Supplement to the National Design
Specification, American Forest & Paper Association, Washington, DC, 2005.
3. “Concrete Forming,” APA—The Engineered Wood Association, Tacoma, WA,
2005.
4. “Plywood Design Specification,” APA—The Engineered Wood Association,
Tacoma, WA, 1997.
5. “Formwork for Concrete,” Special Publication No. 4, American Concrete
Institute, Detroit, MI.
6. “Guide to Formwork for Concrete,” ACI Committee 347-04, American Concrete
Institute, Detroit, MI, 2004.
7. “Timber Construction Manual,” 5th Edition, American Institute of Timber
Construction, John Wiley & Sons, Hoboken, NJ, 2005.
8. “Design of Wood Structures,” 6th Edition, The McGraw-Hill Companies, New
York, NY, 2007
9. “Minimum Design Loads for Buildings and Other Structures,” SEI/ASCE 7-02,
American Society of Civil Engineers, Reston, VA, 2003.
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