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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved