Sign up for ProSoundWeb newsletters
Subscribe today!

Forums Presented By: 
Everything Breaks: Rigging Components & Vital Safety Factors
+- Print Email Share RSS RSS

See our gallery for more examples of rigging component fatigue.
Rigging Risks Exposed (16 photos)
Do you have a rigging safety plan in place? Does your rigging exhibit any of these signs critical signs? Click through to find out!
Related Tags
  Rigging And Stagecraft, Ken Deloria

SIDEBAR: Fatigue Properties
The mechanical properties of steel when a load is repeatedly applied is known as its fatigue strength.

Fatigue testing determines the ability of a material to withstand repeated applications of a load.

The load by itself may be too small to produce a failure.

There are three factors involved when considering fatigue strength:
1) The number of cycles at which a crack initiates;
2) The number of cycles at which the crack starts to grow;
3) The number of cycles at which the fitting fails.

One accepted method of fatigue rating fittings is to test them to one and a half (1-1/2 times the working load limit for 20,000 cycles, without failure.

This standard test is accepted as indicating indefinite life when used within the working load limit under normal circumstances.

Commenting is not available in this weblog entry.