The examples and perspective in this article may not represent a worldwide view of the subject. (April 2012) |
A proof test is a form of stress test to demonstrate the fitness of a load-bearing or impact-experiencing structure. An individual proof test may apply only to the unit tested, or to its design in general for mass-produced items. Such a structure is often subjected to loads above those expected in actual use, demonstrating safety and design margin. Proof testing is nominally a nondestructive test,[1] particularly if both design margins and test levels are well-chosen. However, unit failures are by definition considered to have been destroyed for their originally-intended use and load levels.
Proof tests may be performed before a new design or unit is allowed to enter service, or perform additional uses,[2] or to verify that an existing unit is still functional as intended.[3]