Reductive factor by which an observed or estimated no observed adverse effect level (NOAEL) concentration or dose is divided to arrive at a criterion or standard that is considered safe or without appreciable risk.
The ultimate strength of the material divided by the allowable working load. the element of safety needed to make certain that there will be no structural failures.
A number intended to provide a margin of safety and account for the inherent uncertainty in projecting the results of animal toxicology tests to humans. EPA toxicologists usually use a safety factor of 100, representing the difference in sensitivity between human and test animals (one factor of 10) and the difference in sensitivity among different people (a second factor of 10). Safety factors from 10 to 1,000 may be used.
A number that the tensile strength is divided by in order to determine the safe working load (for new rope in good condition with proper splices).
is a multiple of safety greater than 1 that is applied to the design load carrying capacity of a pile. Engineers and codes may specify the factor of safety depending on the structure that is being supported. Most codes require a safety factor of 2. This is sometimes increased depending on the amount of information available about the site.
The ratio of the maximum strength of a piece of material or a part to the probably maximum load to be applied to it. If a maximum of 2,000 pounds can be tolerated, a load of 500 pounds will have a 4 to one factor of safety.
The ratio of ultimate stress to allowable stress, or some similar ratio of units expressing this intent.
Also called Uncertainty Factor. When scientists don't have enough information to decide if an exposure will cause harm to people, they use "safety factors" and formulas in place of the information that is not known. These factors and formulas can help determine the amount of a chemical that is not likely to cause harm to people.
Also referred to has a Service Factor, it is an industry standard requiring the FIBC to handle five or six times its Safe Working Load, (SWL), normally written as a ratio, "5:1 or 6:1 SF".
This refers to a numerical factor by which the No Effect Level is divided in order to specify an Acceptable Daily Intake. This is an arbitary figure, but the textbooks recommend that normally a figure of 100 should be chosen.
A ratio used to establish the working pressure of a hose based upon the burst pressure.
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.