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Topic: Factor of safety

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	Factor of safety - Definition, explanation
		Factor of safety (FoS), also known as Safety Factor, is a multiplier applied to the calculated maximum load (force, torque, bending moment or a combination) to which a component or assembly will be subjected.
		Prime considerations are the accuracy of load and wear estimates, the consequences of failure, and the cost of overengineering the component to achieve that factor of safety.
		This low safety factor is why aerospace parts and materials are subject to more stringent testing and quality control.
	www.calsky.com /lexikon/en/txt/f/fa/factor_of_safety.php (367 words)

	Safety Factor (Site not responding. Last check: 2007-10-24)
		Safety factor is the structural strength divided by the minimum structural strength required.
		Generally, the greater the safety factor, the lower the cost of crafting, designing, handling and testing the structure; but, this is a vague relationship which is not modeled in these scripts.
		The safety factor is used to calculate the effective tensile.
	members.axion.net /~enrique/safetyfactor.html (157 words)

	Factor of safety - Wikipedia, the free encyclopedia
		Factor of safety (FoS), also known as safety factor, is a multiplier applied to the calculated maximum load (force, torque, bending moment or a combination) to which a component or assembly will be subjected.
		An appropriate factor of safety is chosen based on several considerations.
		Prime considerations are the accuracy of load and wear estimates, the consequences of failure, and the cost of overengineering the component to achieve that factor of safety.
	en.wikipedia.org /wiki/Factor_of_safety (292 words)

	Factor of safety
		Factor of safety, also known as Safety Factor, is a multiplier applied to the calculated maximum stress to which a component will be subjected.
		Typically, for components whose failure could result in substantial financial loss, or serious injury or death, a safety factor of at least four (4) is used.
		Safety factors are needed to account for imperfections in materials, flaws in assembly, material degradation, and unexpected stresses.
	www.teachtime.com /en/wikipedia/f/fa/factor_of_safety.html (103 words)

	Factor of safety Summary
		Safety factors are used to obtain a safety reserve, a margin between actual conditions and those that would lead to failure.
		A safety factor is most commonly expressed as the ratio between a measure of the maximal load not leading to the specified type of failure and a corresponding measure of the applied load.
		a 50% Margin of Safety is equivalent to a factor of safety of 1.5.
	www.bookrags.com /Factor_of_safety (1016 words)

	Safety factor - Information from Reference.com
		Factor of safety (FoS) can mean either the fraction of structural capability over that required, or a multiplier applied to the maximum expected load (force, torque, bending moment or a combination) to which a component or assembly will be subjected.
		Careful engineers refer to the first sense as a factor of safety, or, to be explicit, a realized factor of safety, and the second sense as a design factor, but usage is inconsistent and confusing, so engineers need to be aware of both.
		The factor of safety used in steam boilers is usually between 8 and 10.
	www.reference.com /search?q=Safety+factor (579 words)

	Factor of Safety - Search Results - MSN Encarta (Site not responding. Last check: 2007-10-24)
		Factor of Safety, in engineering, the ratio of the calculated strength of a member or piece of material to the predicted structural demand that will...
		The causes of accidents are extensively investigated, and it is usually found that a sequence of events precedes a catastrophe.
		Research studies in the United Kingdom, Australia, and the United States have shown that human factors contribute to 95 per cent of accidents, road...
	uk.encarta.msn.com /Factor_of_Safety.html (119 words)

	Calculating Factors of Safety for Package Burst and Creep Test Fixtures (MDDI archive, Jan 98)
		An indication of a stress factor of safety of 2.0 is shown in Figure 4.
		By decreasing the allowable stress from the expected yield stress of 42,000 psi to 21,000 psi, the plate thickness is increased for the factor of safety.
		By decreasing the allowable stress from 42,000 psi to 21,000 psi, the plate thickness is increased for a factor of safety.
	www.devicelink.com /mddi/archive/98/01/028.html (2700 words)

	Factors of Safety
		The factor of safety also known as Safety Factor, is used to provide a design margin over the theoretical design capacity to allow for uncertainty in the design process.
		The selection of the appropriate factor of safety to be used in design of components is essentially a compromise between the associated additional cost and weight and the benefit of increased safety and/or reliability.
		The higher factors of safety given above (2.5 to 4) may be used but based on stress levels calculated based on the resulting dissipated energy at impact.
	www.roymech.co.uk /Useful_Tables/ARM/Safety_Factors.html (730 words)

	How to Determine the Factor of Safety
		To display factor of safety contours, choose the "Factor of Safety" command in the "Results Options" menu of the Superview IV Results environment of FEMPRO (see Figure 1).
		A factor of safety of 1 represents that the stress is at the allowable limit.
		A factor of safety of greater than 1 represents how much the stress is within the allowable limit.
	www.algor.com /service_support/hints_tips/factorofsafety.asp (457 words)

	RESULTS CALCULATE SAFETY Loadcase_name [Step_number]
		The minimum safety factor is then calculated and stored for each node in the current subset of the model.
		For each pair of principal stresses the Factor of Safety (FOS) is calculated as defined in the Appendix H of the User Manual Appendices.
		The minimum Factor of Safety is stored along with the direction cosines of the pair of stresses that caused it.
	www.princeton.edu /~dynaflow/femgv/manuals/userman/node291.htm (320 words)

	FACTOR OF SAFETY - USAF DESIGN PRACTICE
		A review of the historical development of the 1.5 structural factor of safety for airplanes, the 1.4 factor for manned space vehicles, and the 1.25 factor for missiles is presented from an Air Force perspective.
		Several variations and experimental applications of the factor of safety design concept and reliability based design concepts are also reviewed to show their interaction.
		There is, however, a tendency among engineers to both challenge the continued application of factors of safety for efficient airframe design, and yet to avoid any changes that would challenge the confidence of future designs.
	quanterion.com /Documents/Documents.asp?ArgVal=74 (189 words)

	Factor of Safety
		Why mention this, because some people use factor of safety to take short cuts or improperly apply this determine in there reasoning to allow a pressure vessel to operate even though common sense would suggest otherwise.
		Factors of Safety are used because no manufacture can guarantee 100% quality.
		Putting this in another way, a factor of safety compensate for imperfections in the pressure vessel; therefore, every pressure vessel should be treated the same regardless of the factor of safety.
	www.accidents-inspections.com /Tutorials/factor_of_safety.htm (151 words)

	Finite Element Analysis engineering - Regarding Factor of Safety
		factor of safety..depends the structure..and the application..also on the rigidity of the structure..probably FS of 2 to 4 is recommended..
		Considering all of above a factor of safety of 1.5 or higher may be accpetable.
		But generally when deciding the factor of safety prior experience with the type of equipment if avialable should be considered.
	www.eng-tips.com /viewthread.cfm?qid=155206&page=1 (1096 words)

	Slope stability engineering - how to get factor of safety of slope based on finite element analysis
		The factor of safety is the strength reduction factor for failure, i.e.
		The factor of safety is generally defined as the available resisting force divided by the driving force.
		We are tasked with estimating the current Factor of Safety or capacity and the future Factor of Safety or capacity with various changes in load conditions.
	www.eng-tips.com /viewthread.cfm?qid=98639&page=1 (3932 words)

	Safety Factor (Site not responding. Last check: 2007-10-24)
		Factor of Safety is a traditional approach to judging adequacy of design and is normally based on our experience.
		The same value of safety factor is often applied to conditions that involve widely varying degrees of uncertainty.
		I prefer to approach adequacy of design in terms of both safety factor and reliability.
	www.pantechnica.com /resources/newsletters/2002/august/FactorSafety.htm (431 words)

	Broadband High Protection Factor Laser Safety Eyewear
		The KB-AL style laser safety eyewear from Laser 2000 delivers high protection across a broad operating wavelength range.
		In addition, the goggles are of sufficient size to allow standard prescription spectacles to be worn under them.
		For assistance in choosing the most appropriate laser safety eyewear for a given hazard, please contact Laser 2000.
	www.laser2000.co.uk /lasers/accsry/kbal.htm (254 words)

	Changes in the factor of safety within the superstructure of a dicot tree -- Niklas 86 (5): 688 -- American Journal of ...
		Changes in the factor of safety within the superstructure of a dicot tree -- Niklas 86 (5): 688 -- American Journal of Botany
		Changes in the factor of safety within the superstructure of a dicot tree
		of safety was plotted as a function of stem age.
	www.amjbot.org /cgi/content/abstract/86/5/688 (573 words)

	Safety Factor
		Rockwell Laser Industries : Safety Recommendations of Laser Pointers These factors will be discussed and safety recommendations for laser pointers will be presented..
		We also estimated the mechanical safety factor for maximum tree height and for buckling.
		Deterministic landslide hazard zonation The Safety Factor formula as presented above will be transformed into a user-defined function FS.
	www.safetyfactor.info (322 words)

	Safety Factor Our Pride - Buddha Air
		To maintain the impeccable safety record of the company, BA operates in only six fully navigational aid equipped asphalt airports with more than 3700 feet runway length and end all flights at TIA, Kathmandu.
		BA has invested heavily in maintaining the safety of the aircraft.
		The pilots are under strict instructions to maintain the highest level of safety even at the cost of aborting or canceling flights.
	www.buddhaair.com /safety.php (417 words)

	A cellular automaton for the factor of safety field in landslides modeling
		A cellular automaton for the factor of safety field in landslides modeling
		To understand these distributions, we consider a cellular automaton model based on a dissipative dynamical variable associated to a time and position dependent factor of safety.
		Citation: Piegari, E. Cataudella, R. Di Maio, L. Milano, and M. Nicodemi (2006), A cellular automaton for the factor of safety field in landslides modeling, Geophys.
	www.agu.org /pubs/crossref/2006/2005GL024759.shtml (426 words)

	WCB Standards - WCB Standard: WPL 3-2004 Safety Factor and Minimum Breaking Strength for Suspended Work Platforms and ...
		"Safety Factor" means the theoretical reserve capability of a product, determined by dividing the breaking strength by the rated working load unless otherwise noted.
		(3) A hanger or stirrup used for supporting a swing stage must have a safety factor of at least 10.
		(6) A suspended work platform must have a safety factor of at least 4 based on the ratio of the ultimate load carrying capacity of the work platform to the rated load.
	www2.worksafebc.com /Publications/OHSRegulation/WCBStandards.asp?ReportID=33453 (597 words)

	TECH:Safety Factor (Gen) (Site not responding. Last check: 2007-10-24)
		Student will learn general safety rules and will learn how to safely use tools and Facilities to create diagnose, adjust, and repair items through watching and processing a video.
		Students who pass the safety evaluation will be able to use designated facilities and equipment.
		Conduct a discussion after the video about safety and review the necessary points for students to remember.
	www.uen.org /Lessonplan/preview?LPid=351 (115 words)

	How high must the factor of safety be to avoid failure? (Site not responding. Last check: 2007-10-24)
		How high must the factor of safety be to avoid failure?
		This is the basis of a factor-of-safety approach.
		Figure 2 illustrates the factor of safety concept.
	www.public.iastate.edu /~liquid/fos.htm (550 words)

	Materials & Factor of Safety - Boat Design Forums
		Incidentally, the same aerospace industry takes a simpler approach to safety factors than we do: They place limits on G-loads, gust velocities and forward speed, among others.
		There is a reason for seemingly inconsistent answers to questions about factors of safety.
		Much of sailing is self governed and relies on personal judgment for when to sacrafice speed for safety (judgement commently known as seamanship).
	www.boatdesign.net /Forums/showthread.php?t=6092 (1337 words)

	Deflection Limits and Factor of Safety (Site not responding. Last check: 2007-10-24)
		The L/D limits and Factors of Safety applied in the following Load/Span tables are appropriate for FRP roofing and siding panels according to ASTM D-3841, Standard specification for glass reinforced plastic panels.
		To ensure quality performance, panel specifications should include these deflection limits (L/D) and Factors of Safety as minimum standards for acceptable performance.
		In other words, for siding applications span limits defined by L/20 have to be reduced by 15% to equal span limits calculated at L/30.
	www.grahamfrp.com /fx050016.htm (460 words)

	Amazon.com: AO Safety XF303 X-Factor Eyewear Safety Glasses with Blue Lenses: Tools & Hardware (Site not responding. Last check: 2007-10-24)
		MSA Safety Works 10020586 Custom Fit Safety Glasses with Blue Mirror Lens MSA Safety Works
		AOSafety 15200 Professional Safety Glasses with Clear Lenses (Lexa) AO Safety
		If you are looking for a comfortable set of safety glasses that you can wear all day (everyone thinks I've got regular sunglasses on) buy a set of these.
	www.amazon.com /exec/obidos/tg/detail/-/B00009LI4H?v=glance (741 words)

	The Safety Factor
		When window covering cords are accessible to small children, these seemingly harmless products may become strangulation hazards.
		This is especially important with older window coverings that may not meet the latest national standards for safety.
		Our traversing drapery hardware, which uses looped cords have those cords anchored to a tension pulley.
	www.springcrestsalem.com /safety.htm (274 words)

	MWWCORP.COM - Scared by Code: Commentary on the State of Software Engineering
		You see, during my mechanical engineering years, when I designed a mechanical part, I would analyze all the stress concentrators (weak points in the design) and build in a factor of safety that was in many cases a simple process of adding a multiplier to the appropriate parts of my equations.
		This was magical, since the new equations would output the new dimensions of the part, which subsequently would fortify the part to withstand the stresses to be exerted on it.
		This means that when I started programming, I was scared to death because there were no apparent methods to “ensure” or gauge how “safe” my code was, let alone provide me with a factor of safety in case the code was used improperly.
	www.mwwcorp.com /programming/codescare.html (947 words)

	Factor of Safety Encyclopedia @ DirtyArt.com (Dirty Art) (Site not responding. Last check: 2007-10-24)
		Factor of Safety Encyclopedia @ DirtyArt.com (Dirty Art)
		Find More Information about "Factor of safety" in DirtyArt.com's:
		"Factor of safety" results in these other popular encyclopedia sites:
	dirtyart.com /encyclopedia/Factor_of_safety (400 words)

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