Factor of safety


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factor of safety

[′fak·tər əv ′sāf·tē]
(mechanics)
The ratio between the breaking load on a member, appliance, or hoisting rope and the safe permissible load on it. Also known as safety factor.

Factor of safety

A factor used in structural design to provide a margin of safety against collapse or serious structural damage. It allows for any inaccurate assumptions in the loading conditions, inadequate control over quality of workmanship, and imperfections in the materials, but not mathematical errors.

factor of safety, safety factor

1. The ratio of the ultimate stress of a structure or pressure vessel to the design working stress.
2. The ratio of the ultimate breaking strength of a member or piece of material or equipment to the actual working stress or safe load when in use.
References in periodicals archive ?
To validate the derived equation and the random search approach, the factor of safety computed by the translational mechanism was compared with the results obtained by Huang et al.
With the factor of safety output plotted as a single distribution, the probability of failure is simply the area under the curve to the left of a factor of safety equal to one.
A larger variation of the factor of safety is due to wide range of variation in the input parameter.
R]) defined herein as the ratio of long-term factor of safety of geosynthetic-reinforced cover slope to that of the unreinforced structure may be as high as 150% for the range of seismic events covered in hazard mitigation programs.
The computed results of the different copulas show insignificant discrepancies for a relatively small factor of safety.
Liquefaction susceptibility is determined on the basis of factor of safety (FOS) computed by taking the ratio of Cyclic Stress Ratio (CSR) and Cyclic Resistance Ratio (CRR).
So, the other possible remedial measure, that is mud level reduction, is necessary to increase the factor of safety up to a value of 1.
L] is determined, assuming a log-normal distribution of the factor of safety.
A custom code, based on the Goodman fatigue method, was used with Marc to evaluate the factor of safety for each element of the model,
5 HP; Control: Pendant Push Button; Length of Pendant Push Button: 7 Metres; Factor of safety of Wire Rope: 5; Control Voltage: 24 Volts; Supply Voltage: 400/440 Volts, 50 c/s AC Supply; Type of Gearbox: Totally Enclosed Oil Splash lubricated all helical fabricated of MS plates; Type of Motor: High Starting Torque Square cage type intermittent duty (S3/S4),Enclosure IP-65 TEFC,Class F Insulation; Efficiency class: Eff2;Type of Wire Rope Drum: Fabricated and Rolled Type with MS Plates; Size of I-Beam for Hoist: 600 X 210 X 12 mm;Description of electrical components as per annexure-A; Along with mandatory spare parts as per Annexure- B
The limit equilibrium method for the estimation of the factor of safety (FS) of the rock slope against plane failure has been widely accepted by the engineers, mainly because of its validity and simplicity.
Keeping the factor of safety and height constant calculated values from the given formulae are plotted on the chart 01 as shown in figure 5 to find the approximate value of slope angle.