margin of safety

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margin of safety

[′mär·jən əv ′sāf·tē]
(design engineering)
A design criterion, usually the ratio between the load that would cause failure of a member or structure and the load that is imposed upon it in service.

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.

margin of safety

The safety factor, expressed either in a percentage or a ratio, by which the ultimate failing load of components exceeds the design limit load.
References in periodicals archive ?
The amount of resources expended on maintaining a well-trained Safety staff is usually much less but it informs every term in the safety margin equation above.
where Z--the random safety margin by Eq (1) and Eq (3); H > 0--the event of visual and nondestructive inspection results showing a successful opposition of members to unforeseen extreme action effects.
As Table 1 shows, half the safety margins in the severe bend condition were 0 or less (the median safety margin was 0).
Even with modern biphasic ICDs, inadequate safety margin (>10 J) has been reported in up to 6.
Environmental Protection Agency-established thresholds of methylmercury exposure that were set with extremely conservative safety margins.
In view of the small safety margin associated with the resection of mesenchymal tumors and the potential of malignant mesenchymal soft-tissue tumors for local recurrence, the primary tumor site was irradiated with a total dose of 70 Gy (2 Gy in five treatments per week over 7 weeks).
Sight-Rite[TM] is ideal for applications where visual inspection is critical and liquid output is required in a safety margin.
MANITOWOC, WIS The company's Sight-Rite flow indicator is specifically for applications where visual inspection is critical and liquid output is required in a safety margin.
These active safety systems provide a wider safety margin without diluting the car's handling.
As Martin-Lof notes, "This is a safety margin which we consider integral to our acquisition strategy.
However, a smaller safety margin also calls for (larger) amounts to be reserved below the expenditure ceiling, in order to maintain both a smooth budgeting process as well as and the priorities set for the medium term in the coalition agreement.